Abstract:
An anastomat for circumcision related to a medical apparatus and instrument for cutting off the excess foreskin of a penis.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority from PCT/CN2009/000406 filed Apr. 16, 2009, which claims priority from Chinese Patent No. 200810115588.X filed Jun. 25, 2008, both of which are incorporated herein by reference. 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH 
     Not applicable. 
     FIELD OF THE INVENTION 
     The present invention relates to a medical apparatus and instrument, particularly to an apparatus and instrument for cutting off the excess foreskin of a male. 
     BACKGROUND OF THE INVENTION 
     The redundant prepuce or phimosis is one of the origins of diseases such as male urinary system disease and sexually transmitted disease, which may results in the chronic prostatitis as well as a series of symptoms such as backache, impotence and premature ejaculation. Therefore, removing the redundant prepuce or phimosis is one of the measures to prevent such diseases mentioned above. 
     Methods for removing the redundant prepuce or phimosis have been innovated for several times since early times of new Country, one of which is to perform a surgical operation. However, an operation inevitably produces bleeding and suffering, and the wound needs to be stitched, the patient needs to take an antiphlogistic or hang an antiphlogistic bottle as well as change dressing every day after the operation. Moreover, the stitches need to be removed after healing, which may result in walking inconvenience. Therefore, such operation is preferred to be performed under hospitalization which costs much for an entire treatment. Another method is the circumcision utilizing laser. Due to the clinical application of laser, the problem of bleeding during an operation was resolved. However, it may burn the skin and cause edema. Furthermore, the stitching of wound requires catgut and costs a longer time. The treatment required mass of antibiotics is expensive for the public. Additionally, obvious scars would occur. 
     There is still another method disclosed in the Chinese Patent No. 200310118525.7, titled “Tubular Anastomat For Circumcision With Bearings”, in which problems such as bleeding, stitching, antiphlogistic requirements and expensive cost, which may occur during a surgical operation for removing the redundant foreskin, were resolved. However, said tubular anastomat for circumcision is arranged as an integrated sleeve equipped with an annular knife therein whose cutting edge is relatively sharp, this causes severely suffering during the operation and healing process. Moreover, since the tubular anastomat for circumcision formed into an integrated configuration whose weight cannot be ignored has to be suspended on the penis for a while after the foreskin cutting process, the patient may feel uncomfortable. Furthermore, it would directly influence the foreskin cutting as well as the postoperative recovery, if the penis becomes hyperemia due to erection. Additionally, when used, the cut deepness to the foreskin is adjusted by a spring arranged at one side of the bearing or stop collar, which is not accurate enough and hard to control. 
     SUMMARY OF THE INVENTION 
     The present invention is intended to overcome drawbacks of existing technology and provide an anastomat for circumcision, which can minimize the possibility of bleeding, suffering, suture and antiphlogistic requirements, and prevent the occurrence of penile erection during the foreskin cutting and postoperative recovery, as well as facilitate the cut deepness control, by utilizing a movable and elevating cutting knife. 
     In one embodiment, the present invention includes an anastomat for circumcision, comprising: i) an inner cutting ring comprising an upper casing pipe, a lower casing pipe and a connecting plate for connecting said upper casing pipe and said lower casing pipe; ii) an outer cutting ring comprising an upper sleeve, an upper circular blocking piece arranged at the upper end of said upper sleeve, a lower sleeve, and a connecting rod for connecting said upper sleeve and said lower sleeve; iii) a connecting ring comprising a casing pipe and a lower annular blocking piece arranged at the lower end of said casing pipe; iv) said upper circular blocking piece is provided with several projecting spots on its internal surface; v) said inner cutting ring is sleeved into said outer cutting ring, said upper casing pipe of the inner cutting ring has an upper end connecting to the inner side of said upper circular blocking piece of the outer cutting ring in a crimped mode, and said lower casing pipe of the inner cutting ring has a lower end connecting to the inner side of said lower annular blocking piece of the connecting ring in a crimped mode; said lower sleeve of the outer cutting ring is detachably connected with said casing pipe of the connecting ring; and vi) clearance is provided between said inner cutting ring and said outer cutting ring for accommodating the foreskin. 
     In another embodiment, the present invention includes an anastomat for circumcision, comprising: i) a tubular inner ring; ii) a tubular outer ring sleeved onto the outer side of said tubular inner ring; iii) an empty cavity for accommodating the foreskin arranged between said tubular inner ring and said tubular outer ring; and iv) said outer ring comprising an outer ring and another outer ring connected with each other, the end of each of the outer ring and the another outer ring being provided with a stop collar respectively, one end of said tubular inner ring being formed as a circumcision end whose external side is provided with a projecting edge, the lower end of said projecting edge being equipped with a binding strip for fastening the foreskin, the other end of said tubular inner ring being fitted with the inner side of said stop collar arranged at the end of the outer ring to axially compress against the tubular inner ring. 
     In yet another embodiment, the present invention includes an anastomat for circumcision, comprising: i) an outer ring for cutting and clamping; and ii) an inner ring for casing the foreskin, the external surface of said inner ring being provided with a recess, the inner side of said outer ring being provided with a knife edge, said knife edge being fitted with said recess to extrude or cut off the foreskin, said outer ring being formed into two semicircular split rings or an integrated flexible split ring having openings, each of said openings having two ends which are provided with an upper knife edge junction and a corresponding lower knife edge junction, respectively, the fringe of each of said upper knife edge junction and said lower knife edge junction being provided with a round corner, each of said upper knife edge and said lower knife edge being a single-layered knife edge or a double-layered knife edge, said double-layered knife edge being provided with a plurality of projecting spots. 
     In yet another embodiment, the present invention includes an anastomat for circumcision, comprising: i) an outer ring for cutting and clamping; and ii) an inner ring for casing the foreskin, the external surface of said inner ring being provided with a recess, the inner side of said outer ring being provided with knife edge, said knife edge being fitted with said recess to extrude or cut off the foreskin, saw teeth being arranged at said knife edge 
     The anastomat for circumcision according to the present invention provides a treatment for curing redundant prepuce or phimosis without suffering, creating wounds, bleeding, stitching, taking medicine and feeling of fear. Particularly, when used, the M-type teeth included will compress the foreskin tightly, and an M-type recess of said M-type allows the analgesic provided therein, so that the whole operation may cost only several minutes. Furthermore, when finished, the patient is able to leave the treatment place immediately and the affected part will be healing in four days without leaving obvious scars, which does not influence normal working and studying. 
     Since its configuration of only arranging an upper casing pipe and a lower casing pipe in the upper part and lower part of the inner cutting ring and outer cutting ring respectively which are connected through a connecting plate or connecting rod, the anastomat for circumcision according to the present invention has reduced entire weight. Furthermore, the upper casing pipe of the inner cutting ring has an upper end face formed into patterns, which significantly relieves the suffering, when compared with known annular knife edge. Moreover, the connecting plate of the inner cutting ring is additionally provided with an anti-erection plate for preventing the penis from erecting, which effectively avoids the suffering due to wound produced by penile erection. Besides, the graduated ruler arranged on the external side of the connecting rod of the outer cutting ring may facilitate adjusting the crimping force produced between the outer cutting ring and connecting ring depending on the thickness of the foreskin, as well as facilitate adjusting the cut deepness of the foreskin when an elevating cutting knife is arranged between the outer cutting ring and the connecting ring. In addition, since either the upper casing pipe or the lower casing pipe of the inner cutting ring may be designed into a splicing ring, the inner diameter of the inner cutting ring may be adjusted according to the requirement of patients. Due to the moveable configuration, the elevating cutting knife may be lifted up and withdrawn back as desired, which provides a flexible operation. Finally, the present anastomat for circumcision is a disposable product which prevents the disease spreading. Therefore, the present invention provides advantages such as small and exquisite, light weight, convenient to use, as well as low cost, which is valuable to be widely popularized in general hospitals. 
     Additional aspects, advantages and embodiments of the invention will become apparent to those skilled in the art from the following description of the various embodiments and related drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention is described below with references to the accompanying drawings in which like elements are referenced with like reference numerals, and in which: 
         FIG. 1  illustrates an exploded assembly view of an anastomat for circumcision according to the present invention. 
         FIG. 2  illustrates another exploded assembly view of an anastomat for circumcision according to the present invention. 
         FIG. 3  illustrates a perspective view of an acute-angled cutting edge of a detachable cutting knife in an anastomat for circumcision according to the present invention. 
         FIG. 4  illustrates a perspective view of a zigzag cutting edge of a detachable cutting knife in an anastomat for circumcision according to the present invention. 
         FIG. 5  illustrates a sectional view of an anastomat for circumcision provided with a rubber washer according to the present invention. 
         FIG. 6  illustrates a sectional view of an anastomat for circumcision without the rubber washer according to the present invention. 
         FIG. 6A  illustrates a projection view of the upper annular blocking piece with projecting spots on the internal surface according to the present invention. 
         FIG. 7  illustrates a sectional view of an anastomat for circumcision provided with the rubber washer, but without the detachable tubular cutting knife according to the present invention. 
         FIG. 8  illustrates a sectional view of the upper end face of a V-typed tooth formed on the section of the upper casing pipe in the inner cutting ring of an anastomat for circumcision according to the present invention. 
         FIG. 9  illustrates a sectional view of the upper end face of an M-typed tooth formed on the section of the upper casing pipe in the inner cutting ring of an anastomat for circumcision according to the present invention. 
         FIG. 10  illustrates a sectional view of the connecting ring in an anastomat for circumcision according to the present invention. 
         FIG. 11  illustrates the detachable casing pipes which are spliced together of the inner cutting ring in an anastomat for circumcision according to the present invention. 
         FIG. 12  illustrates a top view of the end face formed into patterns of the upper casing pipe of the inner cutting ring in an anastomat for circumcision according to the present invention. 
         FIG. 13  illustrates a sectional view showing the assembly configuration of an anastomat for circumcision according to the present invention. 
         FIG. 14  illustrates the assembly configuration of an anastomat for circumcision according to the present invention. 
         FIG. 15  illustrates a sectional view of the tubular inner ring in an anastomat for circumcision according to the present invention. 
         FIG. 16  illustrates a top view of the tubular inner ring in an anastomat for circumcision according to the present invention. 
         FIG. 17  illustrates the configuration of the tubular outer ring A in an anastomat for circumcision according to the present invention. 
         FIG. 18  illustrates the configuration of the tubular outer ring B in an anastomat for circumcision according to the present invention. 
         FIG. 19  is partial view of the snap-fitted configuration of the tubular outer ring A in an anastomat for circumcision according to the present invention. 
         FIG. 20  is partial view of the snap-fitted configuration of the tubular outer ring B in an anastomat for circumcision according to the present invention. 
         FIG. 21  illustrates the assembly configuration of an anastomat for circumcision according to the present invention. 
         FIG. 22-1  illustrates the configuration of the tubular inner ring formed into two semicircles in an anastomat for circumcision according to the present invention. 
         FIG. 22-2  illustrates the configuration of the tubular inner ring formed into a whole in an anastomat for circumcision according to the present invention. 
         FIG. 23  illustrates the configuration of the tubular outer ring in an anastomat for circumcision according to the present invention. 
         FIG. 24  illustrates a sectional view of the tubular outer ring in an anastomat for circumcision along K-K line according to the present invention. 
         FIG. 25  illustrates a sectional view of the tubular inner ring in an anastomat for circumcision along L-L line according to the present invention. 
         FIG. 26A  illustrates the enlarged details of a configuration of part A of the tubular outer ring in an anastomat for circumcision according to the present invention. 
         FIG. 26B  illustrates the enlarged details of another configuration of part A of the tubular outer ring in an anastomat for circumcision according to the present invention. 
         FIG. 26C  illustrates the enlarged details of still another configuration of part A of the tubular outer ring A in an anastomat for circumcision according to the present invention. 
         FIG. 26D  illustrates the enlarged details of further another configuration of part A of the tubular outer ring in an anastomat for circumcision according to the present invention. 
         FIG. 27  illustrates the sectional configuration of the upper and lower single-layered knife edge junctions of an anastomat for circumcision along M-M line according to another example in the present invention. 
         FIG. 28  illustrates the sectional configuration of the upper and lower double-layered knife edge junctions of an anastomat for circumcision along M-M line according to another example in the present invention. 
         FIG. 29  illustrates the configuration of the tubular outer ring of an anastomat for circumcision according still another example in the present invention. 
         FIG. 30  illustrates the enlarged sectional details of part A in  FIG. 29 . 
         FIG. 31  illustrates the configuration of the tubular outer ring formed into an integrated flexible split ring in an anastomat for circumcision according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following embodiments described in details with reference to the appended drawings are illustrated for the purpose of explaining the present invention only, rather than limiting the protection scope thereof. 
     Refer to  FIG. 1 ,  FIG. 8  and  FIG. 9 , the present invention relates to an anastomat for circumcision comprising an inner cutting ring I consisted of an upper casing pipe  1  for tightly compressing the subcutaneous tissue prepuce and vessels in the foreskin to death, a lower casing pipe  2 , and a connecting rod  3  for connecting said upper casing pipe  1  and lower casing pipe  2 ; said upper casing pipe  1  has an upper end face evenly provided with several face teeth  12  in various shapes functioning to compress against said upper casing pipe  1 , each of said face teeth  12  may form into patterns  11  alternated with concave form and convex form (refer to  FIG. 1 ), or form into a A-typed tooth  12   a  (refer to  FIG. 9 ) or M-typed tooth  12   b  (refer to  FIG. 8 ); said inner cutting ring I may be formed into an integrated ring or several parts spliced together; the pipe wall of said upper casing pipe  1  and lower casing pipe  2  of the inner cutting ring I may be further provided with a lacerable strip  27 , through which an axial tear action may be done easily. 
     The anastomat for circumcision according to the present embodiment further comprises a cutting casing pipe  24  for cutting off the excess foreskin which is provided with a helix groove  14  on its pipe wall and a pipe foot  25  at its lower end; said pipe foot  25  is connected with a rotary buckle  26 ; said cutting casing pipe  24 , pipe foot  25  and rotary buckle  26  are connected together to form an elevating tubular cutting knife II which can be lifted up and lowered down. 
     The anastomat for circumcision according to the present embodiment further comprises an upper sleeve  5  for fixing a blocking piece, an upper annular blocking piece  6  arranged at the upper end of said upper sleeve  5  functioning for cooperating with the upper casing pipe  1  of the inner cutting ring I so as to tightly compress the foreskin to death; a lower sleeve  7  connecting to a connecting ring; a connecting rod  8  for connecting the upper sleeve  5  with the lower sleeve  7 ; and an outer cutting ring III consisted of said upper sleeve  5 , lower sleeve  7  and connecting rod  8 . 
     The anastomat for circumcision according to the present embodiment further comprises a connecting ring IV consisted of an casing pipe  9  connecting with said outer cutting ring III and tightly clamping said inner cutting ring I; and a lower annular blocking piece  10  arranged at the lower end of said casing pipe  9 . 
     The anastomat for circumcision according to the present embodiment further comprises a detachable anti-erection plate V arranged at the inner side of the connecting plate  3  of the inner cutting ring I (refer to  FIG. 6 ). 
     As illustrated in  FIGS. 1-12 , the inner cutting ring I is sleeved into the outer cutting ring III in such a manner that the upper end face of the upper casing pipe  1  of the inner cutting ring I can be connected to the inner side of the upper annular blocking piece  6  in the outer cutting ring III in a tightly crimped mode, and the lower end face of the lower casing pipe  2  of the inner cutting ring I can be connected to the inner side of the lower annular blocking piece  10  in the connecting ring IV in a tightly crimped mode; the elevating tubular cutting knife II which can be lifted up and lowered down is arranged between the inner cutting ring I and outer cutting ring III in such a manner that the pipe foot  25  at the lower end of the elevating tubular cutting knife II can pass through an arc groove  16  arranged on the lower annular blocking piece  10  of the connecting IV and then be connected to a rotary buckle  26  arranged on the elevating tubular cutting knife II; wherein, the connection between the lower casing pipe  7  of the outer cutting ring III and the casing pipe  9  of the connecting IV is a detachable connection. 
     Alternatively, as illustrated in  FIGS. 2 ,  7 ,  8 ,  9 , the above-mentioned embodiment may be provided without the elevating tubular cutting knife II. 
     The upper casing pipe  1  of the inner cutting ring I according to the present invention has an end face evenly distributed with a plurality of face teeth  12  formed into patterns  11  alternated with concave form and convex form, or formed into A-typed tooth  12   a  or M-typed tooth  12   b ; A-typed tooth  12   a  or M-typed tooth  12   b  is fitted with the inner side of the upper annular blocking piece  6  in the outer cutting ring III or a rubber washer  4  arranged in the upper annular blocking piece  6 , by the way of tightly compressing against there, which functions to compress the cells, tissues and vessels at the root of the excess foreskin to death. 
     According to the present invention, the connecting plate  3  of the inner cutting ring I is provided with a projecting snap  13  at its external surface which can be fitted with a helix groove  14  arranged on the wall of the cutting casing pipe  24  of the elevating tubular cutting knife II, so as to enable said elevating tubular cutting knife II to be lifted up or lowered down. 
     When used, an anti-erection plate V provided with projecting spots is required to be inserted into the inner side of the connecting plate  3  of the inner cutting ring I during the night, so as to stimulate the external surface of the penis thus to prevent it from erection. 
     In order to accurately control the cutting deepness and compression deepness to the foreskin, the present invention provides a graduated ruler  17  indicating the compression deepness arranged at the outer side of the connecting rod  8  of the outer cutting ring III or arranged on the external wall of the lower casing pipe  7  of the outer cutting ring III is adoptable; moreover, a graduated ruler  15  indicating the cutting deepness to the foreskin arranged on the external wall of the casing pipe  9  of the connecting ring IV along its circumference is also feasible. 
     Refer to  FIG. 3  and  FIG. 4 , according to the present invention, one end of the cutting casing pipe  24  of the elevating tubular cutting knife II may be formed into an acute-angled cutting edge  21  or zigzag cutting edge  21   a . One end of said acute-angled cutting edge  21  or zigzag cutting edge  21   a  is allowed for compressing against the inner side of the upper annular blocking piece  6  of the crimping part so as to cut off the foreskin, or, on the contrary, not compressing against said inner side so as to return back to its original position. Alternatively, the acute-angled cutting edge  21  or zigzag cutting edge  21   a  is allowed for compressing against the rubber washer  4  in the upper annular blocking piece  6  so as to cut off the foreskin, or, on the contrary, not compressing against said rubber washer  4  so as to return back to its original position. 
     According to the present invention, the elevating tubular cutting knife II which can be lifted up and lowered down has a cutting casing pipe  24  whose inner diameter is identical with the outer diameter of the upper casing pipe  1  or lower casing pipe  2  of the inner cutting ring I. 
     According to the present invention, the crimping part and the connecting ring IV can be connected with each other through a thread  22 . 
     According to the present invention, clearance  23  should be remained between each of the upper casing pipe  1 , the lower casing pipe  2 , the connecting plate  3  of the inner cutting ring I and each of the upper sleeve  5 , lower sleeve  7  and connecting rod  8  of the outer cutting ring III, so as to accommodate the foreskin. 
     As illustrated in  FIG. 7  and  FIG. 11 , the present embodiment is distinguished from the first embodiment in that the upper casing pipe  1  and lower casing pipe  2  of the inner cutting ring I may be formed into a detachable casing pipe  18  consisted of four segments of arc plates  19  which are spliced together through snap fasteners  20 . Furthermore, the pipe wall of each of said upper casing pipe  1  and lower casing pipe  2  of the inner cutting ring I is provided with a lacerable strip  27 , through which an axial tear action may be done easily. 
     The present embodiment is distinguished from the first embodiment further in that a snap arranged on the external wall of the crimping part is clamped into a slot arranged on the connecting ring, so that the crimping part can be connected with the connecting ring in a snap-fit mode. 
     The present embodiment is distinguished from the first embodiment still further in that the crimping part is connected with the connecting ring IV in such a manner that a ratchet arranged on the outer cutting ring III and a thread arranged on the connecting IV is fitted with each other; wherein said ratchet is liable to be torn, so that a reuse of those cutting devices which may results in disease transmission would be prevented. Therefore, the whole assembly of those cutting devices becomes a disposable product. 
     When used, said inner cutting ring I, elevating tubular cutting knife II, connecting ring IV are arranged onto the outside of the penis, and the excess foreskin is turned over to be covered onto the outside of the upper casing pipe  1  of the inner cutting ring I, then the outer cutting ring III is connected with said inner cutting ring I through a thread or snap; at this time, the patterns  11  or the A-typed tooth and M-typed tooth on the face teeth  12  is gradually compressed against the inner side of the upper annular blocking piece  6  of the outer cutting ring III or to the rubber washer  4  arranged at the inner side of said upper annular blocking piece  6 , so as to gradually extrude the root of the excess foreskin there between and hold back its blood circulation; finally, the rotary buckle  26  arranged at the lower end of the elevating tubular cutting knife II is rotated, which enables the helix groove  24  on the cutting casing pipe  24  to be fitted with the projecting snap arranged on the external wall of the connecting plate in the inner cutting ring I; in this way, the cutting casing pipe  24  is lifted up along said helix groove  14  so as to cut off the necrotic foreskin through the acute-angled cutting edge  21  or zigzag cutting edge  21   a  arranged on the end part of the cutting casing pipe  24 ; after that, the rotary buckle  26  is inversely rotated so as to withdraw the cutting casing pipe  24 , thereby a foreskin cutting is finished. 
     Alternatively, the elevating tubular cutting knife II may be dismounted completely several days after the excess foreskin being compressed at its root part, when the compressed foreskin is gradually necrotic and separated from the penis automatically. Once the excess foreskin is cut off by the elevating tubular cutting knife II, or during the cutting process or healing stage, an anti-erection plate V provided with projecting spots for stimulating the penis is required to be inserted between the penis skin and the inner side of the upper casing pipe  1 , lower casing pipe  2  and connecting plate  3  of the inner cutting ring I, so as to avoid penile erection which may stretch the penis. Moreover, scale marks are provide on the external side of the connecting rod  8  of the outer cutting ring III and the casing pipe  9  of the connecting ring IV, in order to control or adjust the cutting deepness to the foreskin as desired. 
     Another embodiment according to the present invention would be described in details below in conjunction with the appended drawings, as shown from  FIGS. 13-20 . 
     An anastomat for circumcision comprises a tubular inner ring  28 , which is arranged onto the outside of the penis of a patient in such a way that the internal side of the excess foreskin is turned over and covered onto the outside of the tubular inner ring  28 , then a tubular outer ring  29  is arranged onto the outside of the tubular inner ring  28 ; an empty cavity  30  is arranged between said inner ring  28  and outer ring  29  for accommodating the excess foreskin to be cut. Wherein, said tubular outer ring  29  is consisted of a tubular outer ring A  29 - 1  and a tubular outer ring B  29 - 2  which are connected together in a snap-fit mode. Stop collars  31  each having a washer  32  arranged at its inner side are arranged at the end parts of said tubular outer ring A  29 - 1  and tubular outer ring B  29 - 2  respectively. Said tubular inner ring  28  has one end formed into a circumcision end  33  which is provided with a projecting edge  34  at its outer side. Said projecting edge  34  is provided with a binding strip  35  at its lower end for fixing the foreskin. Once said tubular outer ring A  29 - 1  is snap-fitted with said tubular inner ring B  29 - 2  through the ratchet A  37 A and ratchet B  37 B, said circumcision end  33  of the tubular inner ring  28  would be fitted with said washer  32  arranged at the inner side of the stop collar  31  arranged at the end part of the tubular outer ring A  29 - 1  so as to extrude the foreskin. Wherein, the other end of said tubular inner ring  28  is fitted with the inner side of said stop collar  31  arranged at the end part of the tubular outer ring B  29 - 2  so as to axially compress against the tubular inner ring  28 . 
     At least two through holes  36  for injecting medicine solution or cleaner fluid are arranged on the side wall of said tubular outer ring  29  or the end face of the stop collar  31 ; furthermore, several dismounting holes  37  for dismounting the connection between the tubular outer ring A  29 - 1  and tubular outer ring B  29 - 2  are arranged at the side wall of said tubular outer ring  29 . 
     The external wall of said tubular outer ring  29  is provided with bumps  38  or patterns for skid resistance. 
     The end part of said circumcision end  33  of the tubular inner ring  28  is provided with several projecting spots  39  or saw teeth  40 , through which the foreskin can be secured on the circumcision end and then be extruded. 
     The other end of said tubular inner ring  28  may be connected with the stop collar  31  arranged on the tubular outer ring B  29 - 2 , so as to form into a whole to be connected with said tubular outer ring A  29 - 1  to extrude the foreskin. 
     The surface of the projecting edge of said circumcision end  33  may be designed into a taper face  41  whose lower end forms a right angle  42  with the external wall of said tubular inner ring  28 ; said right angle  42  provides a place where the binding strip  35  can fasten the foreskin on the external wall of the tubular inner ring  28 ; said taper face  41  functions to be fitted with positioning bumps  43  on a taper face or an are face between the internal surface of the outer ring A  29 - 1  and the internal surface of the stop collar  31 . Wherein said positioning bump  43  is arranged for the purpose of positioning the circumcision end  33  which is arranged on the tubular inner ring  28 . 
     Said projecting edge  34  may be broken down into several segments which are evenly distributed on the circumference of the external wall of the circumcision end  33  of the tubular inner ring  28 . 
     Said tubular inner ring  28  may be a splicing ring consisted of at least two semicircles which are spliced together. 
     Said outer ring may be consisted of two semicircles whose ends are connected with each other correspondingly by a clamping piece or a screw. 
     The anastomat for circumcision according to the present invention may be operated according to the following steps: firstly, the tubular outer ring B  29 - 2  and the tubular inner ring  28  are arranged onto the outside of the penis in such a way that the circumcision end  33  of the tubular inner ring  28  is faced to the glans penis, then the excess foreskin is turned over and covered onto the outside of the tubular inner ring  28 . Since the projecting edge  34  arranged on the external wall of the circumcision end  33  has a lower end forming a right-angled groove  42  with the external wall of the tubular inner ring  28 , the foreskin covered onto the external wall of the tubular inner ring  28  is fastened by the binding strip  35 , so as to hold the excess foreskin between the tubular inner ring  28  and the tubular outer ring  29 ; finally, the tubular outer ring A  29 - 1  and tubular outer ring B  29 - 2  are connected with each other in a snap-fit mode. Wherein, the end parts, where the tubular outer ring A  29 - 1  and tubular outer ring B  29 - 2  are connected with each other, are provided with stop collars  31  respectively; wherein, the stop collar close to the inner side of the outer ring A  29 - 1  is provided with a washer  32  has a thickness, when added by the length of tubular inner ring, almost equal to the distance from the inner side of the stop collar  31  close to the tubular outer ring A  29 - 1  to the inner side of the stop collar  31  close to the tubular outer ring B  29 - 2 . Therefore, when the tubular outer ring A  29 - 1  and the tubular outer ring B  29 - 2  are snap-fitted with each other, the washer  32  on the inner side of the tubular outer ring A  29 - 1  will be fitted with the circumcision end  33  of the tubular inner ring  28 , so as to extrude the circumcision portion of the foreskin, which allows the subcutaneous tissue prepuce of the foreskin under the extruded portion necrotic due to ischemia, while the anastomat for circumcision will be separated from the penis just 5-7 days after the surgery. It can be seen from the aforesaid process that said anastomat for circumcision is convenient to operate; furthermore, it may be formed into plastic piece or stainless steel piece having small volume, light weight, simple configuration and low cost. Therefore, the present invention may be manufactured into disposable products. Additionally, since at least two through holes  36  are arranged on the side wall or the stop collar of the tubular outer ring, through which medicine solution containing analgesic, anti-inflammatory or cleaner fluid would be injected into the empty cavity, so as to relieve the patient&#39;s pain and accelerate healing. 
     In another embodiment according to the present invention, the anastomat may be designed into a splicing tubular inner ring  28 , a splicing tubular outer ring  29  or a flexible split tubular outer ring  29 , in order to adapt to various requirements from various patients. Wherein, the splicing inner ring may be formed into several pieces of inner ring which are fastened on the penis through an elastic washer, while the splicing outer ring is generally consisted of two semicircles connected with each other through two junctions, one of which is implemented by a hinge, and the other one is implemented by snap fit or fastening screw. Similarly, the ends of the opening of the flexible split tubular outer ring  29  also may be connected by snap fit or fastening screw. 
     Another embodiment according to the present invention would be described in details below in conjunction with the appended drawings, as shown from  FIG. 21  to  FIG. 31 . 
     As illustrated in  FIGS. 21-23 , an anastomat for circumcision comprises a outer ring  44  for cutting and clamping, and a inner ring  45  for covering the foreskin; said inner ring  45  may be formed into a integrated ring or two semicircles or more than two arc segments; said inner ring  45  is provided with at least one circle of recess  46  on its external surface; said recess  46  is provided with an elastic washer  47  on its surface; said outer ring  44  is provided with at least one circle of knife edge  78  whose fringe is evenly distributed with several saw teeth or projecting spots  48 ; said knife edge  78  is fitted with said recess  46  so as to extrude and/or cut the foreskin; channels  52  for injecting medicine solution, which are communicated with the empty cavity between said outer ring  44  and inner ring  45 , are arranged on the side wall of said outer ring  44 . 
     The inner ring  45  and outer ring  44  included in the anastomat for circumcision may be made of high-grade 372-type organic material without toxic and side-effect. 
     The outer ring  44  may be consisted of a left semicircle part  44 -A and a right semicircle part  44 -B; alternatively, the outer ring  44  may also be an integrated flexible split ring. Each of the semicircle part and the flexible split ring has two junctions, one of which can be implemented by a connecting snap  53 , while the other one can be implemented by a fastener  75  and an unlocking hole  76 ; of course, the outer ring  44  may also be formed as an integrated configuration having an opening which can be connected with the fastener  75 . The fastener  75 , which would be explained below through examples, may be implemented in the form of fastening screw  82  or other connection. 
       FIG. 24  illustrates the K-K directional cross-sectional view of the outer ring of an anastomat for circumcision according to one embodiment of the present invention; 
       FIG. 25  illustrates the L-L directional cross-sectional view of the inner ring of an anastomat for circumcision according to one embodiment of the present invention. As illustrated, the present invention focuses on following technical features: said two semicircular split rings or said integrated flexible split outer ring  44  are/is provided with two circles of snap rings  49 ,  50  thereon, while said inner ring  45  is provided with recesses  46  thereon which are fitted with said snap rings  49 ,  50 ; said recesses  46  are provided with convex  51  there between; said inner ring  45  is consisted of a left ferrule and a right ferrule configured to be spaced apart from each other with a junction, and there is a round corner arranged at said junction. The inner ring  45  and outer ring  44  are fitted with each other, so as to clamp the foreskin to be cut off. In this way, the foreskin will be necrosis due to a blood circulation failure. Due to the unavoidable occurrence of infection during the operation, the assistant treatment of medicine solution is required to eliminate inflammation and facilitate skin renewal, which allows for further accelerating healing. The medicine solution accommodated within the empty cavity mentioned-above directly penetrates into the infection portion so as to eliminate inflammation and facilitate skin renewal. Such medicine solution specifically prepared for a circumcision whose prescription has no reference to the present invention will not be given unnecessary details here. 
     Since known operation for fastening the connecting part A of the outer ring  44  is extremely inconvenient which causes patients to be went under the knife extremely suffering, this reinforce their sense of fear and increase the duration of surgery. Several types of connection configuration would be provided below. 
       FIG. 26A  illustrates enlarged detail of a configuration of part A of the outer ring  44  in an anastomat for circumcision according to one embodiment of the present invention. Said outer ring  44  is consisted of two semicircle parts  44 -A,  44 -B, and a connecting snap  53  for connecting one end of said semicircle part  44 -A and one end of said semicircle part  44 -B, while the other ends of the semicircle parts are provided with L-shaped parts  54 ,  55  respectively, which are fitted with each other. A connecting rod  56  and a connecting hole  57  are arranged on the top end and bottom platform of each of said L-shaped parts  54 ,  55 , respectively. Wherein, the connecting rod  56  arranged on one end of a semicircle part is fitted with the connecting hole  57  arranged on the other end of the remaining semicircle part. Each of said L-shaped parts has a vertical end whose internal side is provided with a dentoid protuberance  58  or dentoid groove  59 , wherein the dentoid protuberance  58  or dentoid grooves  59  on one L-shaped part is fitted with the dentoid groove  59  or dentoid protuberance  58  on the internal side of the vertical end of the remaining L-shaped part. In such a manner, nothing but to simply insert the connecting rod  56  into the connecting hole  57  and hold it therein, meanwhile make the dentoid protuberance  58  and the dentoid grooves  59  fitting with each other, so as to close the whole outer ring  44  in a locking way, when it&#39;s desired to lock the semicircle parts  44 -A,  44 -B together. The operation of inserting a screwdriver or other tool into a hole  44  arranged on the L-shaped part so as to destroy the whole configuration therein by acting a slight force thus to open the anastomat for circumcision in the present embodiment is also possible, when it&#39;s desired to break the closed configuration (since the present embodiment is a disposal anastomat for circumcision). 
       FIG. 26B  illustrates the enlarged detail showing another configuration of part A of the outer ring  44  in an anastomat for circumcision according to one embodiment of the present invention. Said outer ring  44  is consisted of two semicircle parts  44 A,  44 B and a connecting snap  53  for connecting one end of said semicircle part  44 -A and one end of said semicircle part  44 -B, while the other ends of the semicircle parts are provided with a hook-like protuberance  61  or slotted hole  62  respectively, the hook-like protuberance  61  or slotted hole  62  arranged at said semicircle part  44 -A is fitted with the slotted hole  62  or hook-like protuberance  61  arranged at said semicircle part  44 -B. Said hook-like protuberance  61  includes a connecting plate  63  and an inverted-V type clamping piece  64 ; said connecting plate  63  has one end connecting to the end part of the semicircle part  44 -A and the other end connecting to the middle part of the clamping piece  64 ; said inverted-V type clamping piece  64  is configured to possess both considerable flexibility and certain hardness, such as stalloy, while said slotted hole  62  has an opening with relatively larger caliber and the internal empty cavity  50  has a relatively larger volume. Said semicircle part  44 -A is provided with a hole  65  at the end thereof, which plays the same role as that of the hole  60  shown in  FIG. 26A . When it&#39;s desired to lock the outer ring  44 , the hook-like protuberance  61  is inserted into the slotted hole  62 , at this time, the clamping piece  64  is fixed and positioned due to its elastic characteristic and then resist against the internal wall of the slotted hole  62  due to its hardness characteristic, so as to be locked there. 
       FIG. 26C  illustrates the enlarged detail showing still another configuration of part A of the outer ring  44  in an anastomat for circumcision according to one embodiment of the present invention. Said outer ring  44  is consisted of two semicircle parts  44 -A,  44 -B and a connecting snap  53  for connecting one end of said semicircle part  44 -A and one end of said semicircle part  44 -B, while the other ends of the semicircle parts are provided with concave slotted holes  66  respectively. Each of said concave slotted holes  66  receives a bow tie-like block  67 . Said semicircle part  44 -A is provide with a hole  68  on its end part which plays the same role as those of the holes  60 ,  62  mentioned above. When it&#39;s desired to lock the outer ring  44 , both ends of the bow tie-like block  67  are inserted into the concave slotted holes  66  respectively. 
       FIG. 26D  illustrates the enlarged detail showing still another configuration of part A of the outer ring  44  in an anastomat for circumcision according to one embodiment of the present invention. Said outer ring  44  is consisted of two semicircle parts  44 -A,  44 -B and a connecting snap  53  for connecting one end of said semicircle part  44 -A and one end of said semicircle part  44 -B, while the other ends of the semicircle parts are provided with bar-type denticles  69  or bar-type sprocket holes  70  respectively. It can be seen from the enlarged details of the bar-type denticle  69  that there are a plurality of small horizontal-strip style protuberances laterally arranged thereon which are fitted with several small recesses laterally arranged in the bar-type sprocket hole  70 , so as to be clamped and further locked therein, when the bar-type denticle  69  is inserted into the bar-type sprocket hole  70 . It should be noticed that the function of clamping and locking is unidirectional, which requires tilt direction of both said small horizontal-strip style protuberances of the bar-type denticle  69  and that of the small recesses in the bar-type sprocket hole  70  form an obtuse angle with insertion direction. That is to say, once locked and positioned, the bar-type denticle  69  won&#39;t be simply pulled out from the bar-type sprocket hole  70  under normal circumstances, which ensures a firm locking and provides a good operability. The present embodiment also provides holes for destroying the connection of the outer ring as mentioned above. When it&#39;s desired to open the closed configuration, a screwdriver or other tool may be inserted into the hole  71  so as to destroy the whole configuration therein by acting a slight force thus to open the anastomat for circumcision in the present embodiment. 
       FIG. 31  illustrates an outer ring formed into an integrated flexible split ring  77  according to the present invention. The opening of said split ring  77  provides two ends equipped with knife edge junctions respectively which are corresponding to each other; said knife edge may be formed into a double-layered knife edge sandwiched with several cutting pieces  79  vertically therebetween. Each of said knife edge junctions is provided with a first ladder snap-fitted block  73 , a second ladder snap-fitted block  74 , an unlocking stem  80 , an unlocking hole  81 , a graduated ruler  83 , a digital ruler  84  and an alarm  85 . 
       FIGS. 27-30  illustrate the outer ring of an anastomat for circumcision according to another embodiment of the present invention. Said outer ring  44  has an opening of which the ends are provided with an upper knife edge  72 A junction and a lower knife edge  72 B junction correspondingly, respectively. One end of said opening, where the upper knife edge  72 A junction is arranged, is provided with a first ladder snap-fitted block  73 , the other end of said opening, where the lower knife edge  72 B junction is arranged, is provided with a second ladder snap-fitted block  74 , and the first ladder snap-fitted block  73  and the second ladder snap-fitted block  74  are fitted with each other. In the section, the first ladder snap-fitted block  73  is positioned below the upper knife edge  72 A junction, while the second ladder snap-fitted block  74  is positioned above the lower knife edge  72 B junction. When used, the lower knife edge  72 B junction is inserted into a position under the upper knife edge  72 A junction, while the second ladder snap-fitted block  74  is clamped above the first ladder snap-fitted block  73 , so that the first and second ladder snap-fitted blocks  73 ,  74  can be tightly engaged with each other due to the position limiting function of the upper and lower knife edge  72 A,  72 B junctions. In such a way, the whole outer ring can be locked strictly. The first ladder snap-fitted block  73  or the second ladder snap-fitted block  74  is provided with a hole  65 , so that a screwdriver or other tool may be inserted therein and destroy the whole configuration by acting a slight force thus to open the anastomat for circumcision in present invention (since the anastomat for circumcision in present invention is a disposal one). 
     Under given several designs of the connection configuration, the operation of the anastomat for circumcision according to the present invention would be provided as follows: 
     Step 1, cleaning and disinfecting the penis, and push the foreskin which covers the glans backwards, so that it can be exposed completely; 
     Step 2, adjusting and positioning the inner ring, then pulling out the foreskin which has been pushed backwards, until it completely covers the inner ring and the glans; 
     Step 3, opening the outer ring, then arranging it onto the outside of the inner ring and fixing it thereon, so that the foreskin will be necrosis due to a blood circulation failure; 
     Step 4, injecting medicine solution into the empty cavity through the channel, by which the medicine solution would be directly supplied to the affected part, so as to diminish inflammation and relieve pains; 
     Step 5, removing the necrotic foreskin after 2-5 (or a little more) days, meanwhile loosening the outer ring or later. 
     A foam-rubber mattress arranged between the outer ring and inner ring may reduce the stress produced during the foreskin cutting process. 
     Known anastomat for circumcision usually comprises an inner ring formed into an integrated circle whose diameter remains unchanged may aggravate the uncomfortable feeling. What is illustrated is an exploded view showing the anastomat for circumcision according to another embodiment of the present invention. Wherein, known integrated inner ring is improved into a left semicircle part  45 - 1  and a right semicircle part  45 - 2 , so as to adapt to the circumstance that the penis may be erected and enlarged. In this way, the extrusion force may be reduced. 
     Additionally, as shown in  FIG. 27  and  FIG. 28 , in another embodiment, the outer ring  44  comprises a semicircle part  44 -A provided with an upper knife edge  72 A junction thereon, and a semicircle part  44 -B provided with a lower knife edge  72 B junction which is corresponding to the upper knife edge  72 A junction. Such configuration allows the outer ring  44  to be well connected. Each of said knife edge junction is provided with a round corner  72  at its fringe which allows the foreskin prevented from being clamped during the operation, thus to ensure the operation successfully and avoid pains. If the foreskin was clamped, a granulation would be formed, which may extend the time for healing and increase the suffering. Similarly, a same or similar round corner may be arranged on the junction of the left and right semicircle parts in the inner ring, so that the foreskin can be prevented from being clamped. 
     When used, the present invention will not cause pains or obvious scar. Instead, it provides an accurate position where the rings will fall from the affected part, as well as a faster healing. The treatment based on the present invention is suitable for the children, youth and aged. Moreover, the type of the anastomat may be selected depending on the actual size of the glans. 
     Furthermore, when used, the anastomat for circumcision in the present invention will not influence normal working and studying, and it can be easily operated without special training, which allows the treatment based on the present invention even can be implemented in a mini clinic. The present invention is further beneficial by its low price. The total cost for the whole period of treatment including the surgery, antiphlogosis and the same is only 160-200 yuan, which is publicly acceptable. 
     The present invention provides an anastomat for circumcision. Since its configuration of only arranging an upper casing pipe and a lower casing pipe in the upper part and lower part of the inner cutting ring I and outer cutting ring III respectively which are connected through a connecting plate or connecting rod, the anastomat for circumcision has a reduced weight. Furthermore, the upper casing pipe of the inner cutting ring I has an upper end face formed into patterns, which significantly relieves the suffering, when compared with known annular knife edge. Moreover, the connecting plate of the inner cutting ring I is additionally provided with a anti-erection plate V for preventing the penis from erection, which effectively avoids the suffering due to wound produced by penile erection. Besides, the graduated ruler arranged on the external side of the connecting rod of the outer cutting ring III may facilitate adjusting the crimping force produced between the outer cutting ring III and connecting ring IV depending on the thickness of the foreskin, as well as facilitate adjusting the cut deepness of the foreskin when a elevating cutting knife II is arranged between the outer cutting ring III and the connecting ring IV. In addition, since either the upper casing pipe or the lower casing pipe of the inner cutting ring I may be designed into a splicing ring, the inner diameter of the inner cutting ring I may be adjusted according to the requirement of patients. Due to its moveable configuration, the elevating cutting knife may be lifted up and withdrawn back as desired, which provides a flexible operation. Finally, the present anastomat for circumcision is a disposable product which prevents the disease spreading. Therefore, the present invention provides advantages such as small and exquisite, light weight, convenient to use, as well as low cost, and possesses the industrial applicability. 
     While preferred embodiments of the invention have been particularly shown and described, it should be understood that several changes and modifies may be made therein without departing from the technical principles of the invention for those skilled in the art, which should be also embraced in the protection range of the present invention.