EXCRETING APPARATUS

Abstract: A protective cover is provided for the ultrasonically oscillatable horn (2). A pump (6) sends a wash under pressure into a flow passage formed between the protective cover and the horn. A suction flow passage is formed in the horn. The faeces in the rectum are crushed by the ultrasonic oscillation of the horn emulsified with the wast and discharged by the suction pump to the outside of the body through the suction flow passage.

Description: TECHNICAL FIELD The present invention relates to an excretions treating apparatus which can extract and remove excrements from a rectum of an inevacuative patient. BACKGROUND ART A patient who needs a certain excretions treatment (to be called "a patient" hereinafter) has been treated with a laxative, a clyster, an anal stimulus and the like according to the condition of the patient. On the other hand, as to the inevacuative patient, a high pressure clyster, a removal of excrements, a suppository or the combination thereof has been applied. The condition of "inevacuative" means that it is impossible to evacuate without help of other person. However, the above-described treatments arise the following problems. In the high pressure clyster, a catheter and a large-sized-syringe are used to inject medical fluid into a patient's rectum through his anus so as to stimulate evacuation. However, in this case, there is a fear that a rectum wall is damaged. In addition, if excrements is hard, the high pressure clyster cannot demonstrate its ability effectively, with the result that the evacuation cannot be fully conducted. Furthermore, it takes a long time to do this treatment, whereby the patient is considerably physically suffering In the removal of the excrements, fingers with a sanity glove worn are inserted directly through patient's rectum to scrape out the excrements. However, if excrements is hard, it is difficult to scrape them out completely, with the result that the evacuation cannot be fully conducted. In addition, there is a fear that a mucous membrane on the patient's rectum is damaged. Suppository is almost useless for hard excrements. In order to overcome the above-described problems, a suction type excretions treatment apparatus has been proposed, which is one of high pressure clyster methods (JP-A-61-293472). In this suction type excretions treatment apparatus, there are provided an outer pipe and a guide pipe which is slidable within the outer pipe. After the outer pipe has been inserted into the patient's rectum, the guide pipe is extended into the patient's rectum beyond an end portion of the outer pipe, and then the medical fluid is injected there through into the patient's rectum. After the excrements has been softened, the guide pipe is retracted to open the end portion of the outer pipe. Then, the thus-softened excrements are extracted from the opened portion of the outer pipe by a vacuum pump into an external reservoir tank through the outer pipe. However, since the excrement is softened simply by the medical fluid, this apparatus could not demonstrate its ability effectively for hard excrements. From US-A-3 589 363 there is known a handheld surgical instrument for breaking apart and removal of unwanted material in surgical operations. The handheld instrument has a hollow operative tip vibrating at a frequency in the ultrasonic range and being surrounded by a tubular sleeve to form an annular passage. Either the hollow tip or the annular passage can be connected with a source of treatment fluid or a suction pump, respectively, to supply and withdraw a suspension of the tissue particles in the fluid from the operative site. US-A-4 045 859 describes a handheld suction wand comprising a suction conduit along its axial lenght. In the dome-shaped suction tip of the wand there are provided a number of appertures which act as a screen for preventing an obstruction or a clogging of the wand or of the suction conduit DISCLOSURE OF THE INVENTION It is an object of the present invention to provide an excretions treating apparatus which is cpable of an effective and safe full evacuation. According to the present invention, an excretions treating apparatus for excrements in a rectum comprises an insert including a horn capable of being mechanically vibrated by ultrasonic oscillation means and a protection cover disposed around said horn to define therebetween a tubular space, a suction passage provided within said horn which opens at one end of said horn, an insulating wall being disposed in an opening portion in said suction passage at a front end thereof and being provided with one or more through apertures, the section of which being smaller than that of the suction passage, means for excreting and removing excrements which have been crushed and emulsified, said excreting and removing means being communicated with said suction passage, and irrigation means communicated with said tubular space for injecting a cleaning liquid through said tubular space into the rectum. With the excretions treating apparatus of the invention, even if the excrements are hard, they can be crushed and extracted readily and completely. Preferred embodiments of the present invention will be described hereinunder with reference to the accompanying drawings: BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a view illustrating a pipe arrangement of an embodiment of the present invention; Fig. 2 is an enlarged cross-sectional view showing an insert shown in Fig. 1; Fig. 3 is a front elevational view showing a horn shown in Fig. 2; Figs. 4A, 5A, 6A and 7A are side-elevational views showing end portions of the horns according to other embodiments, respectively; Figs. 4B, 5B, 6B and 7B are cross-sectional views taken along the line B-B of corresponding Figs. 4A, 5A, 6A and 7A, respectively; Figs. 8, 9, and 10 are side elevational views showing end portions of the horns with an insulation wall being omitted, according to still other embodiments, respectively; Fig. 11A is a fragmentary cross-sectional view of an end portion of an insert with an insulation wall of the horn being omitted according to another embodiment; Fig. 11B is a cross-sectional view taken along the line B-B of Fig. 11A; Figs. 12A and 13A are cross-sectional views showing protection covers according to other embodiments, respectively; Figs. 12B and 13B are cross-sectional views taken along the line B-B of Figs. 12A and 13A, respectively; Fig. 14A is a cross-sectional view showing an end portion of an insert with an insulation wall of the horn being omitted according to another embodiment; and Fig. 14B is a cross-sectional view taken along the line B-B of Fig. 14A. BEST MODE FOR CARRYING OUT THE INVENTION Referring to Figs. 1 to 3, an excretion treating apparatus according to, an embodiment of the present invention comprises an insert portion, an ultrasonic generating portion, an irrigation portion, and an extracting and excreting portion. As shown in detail in Fig. 2, an insert 1 comprises a main body 15 and a horn 2 disposed within the main body 15. An elongate cylindrical extension portion of the horn 2 is surrounded by a protection cover 13 which is fitted to the main body 15. An irrigation nipple 14 for injecting cleaning liquid is screw mounted or fixed to the protection cover 13 by a screw or is inserted into the same. An irrigation tube 9 shown in Fig. 1 is connected to the irrigation nipple 14. An opening through which a suction nipple 17 passes is formed in a lid 16 disposed at the rear end portion of the main body 15. As shown in Fig. 1, a suction tube 11 is connected to the suction nipple 17. A transducer 3 of an electrostrictive type or a magnetostrictive one is so disposed as to be positioned in contact with the horn 2. High-frequency electric power of ultrasonic area is supplied through a cable 5 and then the horn 2 is mechanically vibrated in ultrasonic manner. Reference numeral 4 represents an ultrasonic oscillator for generating high-frequency electric power. The cable 5 is electrically connected to the transducer 3 through an opening formed in the lid 16. The protection cover 13 serves to prevent the horn 2 which is vibrated by the ultrasonic energy from contacting the anus or the wall of the rectum, and may be made of any material. It is preferable that the protection cover 13 is made of plastics, synthetic rubber, or combination thereof on purpose that it is smoothly inserted into the anus and that the patient does not feel cold. A lubricant such as jelly is applied to the outer surface of the protection cover 13 when used, if necessary. It is necessary for the protection cover 13 that a length of a straight portion 27 thereof corresponds to the length from the anus to the excrement in the rectum. In general it is 5 to 12 cm, preferably 10 cm. There is provided O-ring 18 (one or two) between a tapered horn portion in a down stream of the irrigation nipple 14 and an inner surface of the protection cover 13. The O-ring 18 prevents the cleaning liquid from flowing from a tubular cleaning liquid passage towards the transducer 3, which is defined between the horn 2 and the protection cover 13. The protection cover 13 may be connected to the main body 15 by an adhesive bonding, a screw mounting, or a fitting connection. In terms of convenience in replacement of the horn 2, it is preferable that they are connected to each other by the screw mounting or the fitting connection. It is preferable that the main body 15 is made of a material which is non-corrosive against chemicals and light weight, and has high mechanical strength. Such material includes aluminum alloy, polysulfone resin, polyether sulfone resin, and polyimide resin. Polysulfone resin is most preferable. There is provided O-rings 19 (one or two) between the inner surface of the main body 15 and a front surface of a stationary plate 20 of the transducer 3 so as to hold the transducer 3. The lid 16 may be made of a material which is the same as that of the main body 15. Since the suction nipple 17 and the cable 5 pass through the lid 16 as described above, a gap can be easily formed in the lid 16. Therefore, there is a fear of entering of water content such as cleaning liquid or the like into the main body 15. In order to prevent this, the gap must be sealed with an adhesive or the like. Therefore, it is preferable that the lid 16 is made of resin exhibiting an excellent adhesion capability such as polysulfone resin. Since the irrigation nipple 14 and the suction nipple 17 are repeatedly connected to and disconnected from the irrigation tube 9 and the suction tube 11, respectively for every treatment, they are preferably made of a material exhibiting high strength and corrosion resistance. Stainless steel type metal or polysulfone resin are preferable. As shown in Fig. 3 in detail, a front plate 21 and a backing plate 22, both of which are made of duralmin or titanium alloy, are respectively disposed on opposite ends of the transducer 3 made of PZT (plumbeous zirconate titanate). The transducer 3 is clamped by a bolt (not shown) between the front plate 21 and the backing plate 22 to form a so-called bolt langevin transducer (BLT) structure. A flange portion 20 is formed on the front plate 21. The transducer 3 is secured in the main body 15 through the flange portion 20 by means of a pin, an adhesive or a screw. A nipple 23 is provided at an end portion of the backing plate 22. The nipple 23 is connected to the suction nipple 17 by a connection tube 24 made of a material exhibiting an excellent elasticity and heat resistance such as fluoro rubber and silicon rubber. It is preferable that the horn 2 is made of metal of non-corrosive and exhibiting an excellent tension resistance such as duralumin and titanium alloy. Preferably, the horn 2 has a length substantially equal to integral multiple of 1/2 of the wavelength of ultrasonic to be generated. A suction passage 25 is provided to extend in an axial direction through the horn 2, the front plate 21, the transducer 3, the backing plate 22, the transducer nipple 23, and the suction nipple 17. The transducer 3 has a plurality of electrodes 26 to which high-frequency electric power generated by the oscillator 4 is supplied through the cable 5. As a result, the transducer 3 is vibrated in a ultrasonic manner in an axial direction, causing the ultrasonic vibration to be transmitted to the horn 2. Referring back to Fig. 1, reference numeral 6 represents a roller type irrigation pump for pumping cleaning liquid into the insert 1 from a cleaning liquid container 7, which is of isotonic to the body fluid such as physiological saline solution, or innocuous clyster fluid. A pre-heater 8 heats the cleaning liquid in advance up to the degree which is substantially the same as that in the rectum,' for example, 35°C to 42°C. The preheater 8 may be disposed at any portion between the insert 1 and the cleaning liquid container 7. It is preferable that it is positioned between the cleaning liquid container 7 and the irrigation pump 6 since it is not subjected to any pumping pressure from the irrigation pump 6. In addition, the irrigation pump 6 can be omitted from the structure if the cleaning liquid container 7 is disposed at a position higher than that of the insert 1, for example by 50 cm to 100 cm since the cleaning liquid can be allowed to flow due to the potential energy. The irrigation tube 9 for supplying the cleaning liquid is made of soft vinyl chloride resin or silicon resin. However, it is not limited to these resins, and it may be made of various types of resin so far as it has a proper elasticity and it is not deteriorated or the components thereof cannot be solved by the cleaning liquid. A reservoir container 10 is disposed between the insert 1 and the suction pump 12 for the purpose of extracting and reserving the excretions such as the excrements, through the suction tube 11, which have been crushed by the horn 2 disposed at the end portion of the insert 1. The reservoir container 10 is able to accommodate therein a plastic container, a glass bottle, or a disposable plastic bag. The reservoir container 10 can endure the negative suction pressure of 0 mmHg to - 760 mmHg generated by the suction pump 12. The suction tube 11 is made of soft vinyl chloride resin or silicon resin, which can endure the negative pressure generated by the suction pump 12 and as well exhibit a proper flexibility. Then, the operation of the excretions treating apparatus described above will be explained hereinunder. First, the straight portion 27 of the protection cover 13 of the insert 1 is inserted into the rectum through the anus by a proper length. Then, the cleaning liquid such as physiological saline solution is injected into the rectum through the irrigation nipple 14. Simultaneously, high-frequency electric power is supplied from the oscillator 4 to the transducer 3 to ultrasonically vibrate the end portion of the horn 2 in the axial direction thereof and thereby to crush the excrements. The excrements can be emulsified by cleaning liquid with a cavitation phenomenon. The emulsified excrements are extracted through the suction passage 25, the suction nipple 17, and the suction tube 11 by the negative pressure generated by the suction pump 12, and are discharged into the reservoir container 10 as to be reserved therein. Since the excrements in the rectum are crushed and sucked to be removed, the rectum gradually is contracted. As a result, the excrements are successively pushed to the end portion of the horn 2. Accordingly, the whole excrements in the rectum are crushed and sucked to be removed. The frequency of the ultrasonic generated by the oscillator 4 is 17 KHz to 40 KHz, preferably 18 KHz to 23 KHz. According to this, the length of the straight portion 27 of the protection cover 13 can be elongated, which is to be inserted into the rectum through the anus, and as well the oscillating amplitude of the horn 2 can be enlarged. The power required for generating the ultrasonic is 100 W to 1 KW, preferably 200 W to 500 W. The oscillating amplitude of the horn 2 is 40 µm to 300 µm, preferably 100 µm to 200 µm. The embodiments shown in Figs. 4B to 7B have an intention that the working efficiency is improved by increasing a contact area between the end portion of a horn 51 and the excrements and that the clogging of the suction passage with the crushed excrements is prevented. According to the embodiment shown in Fig. 4B, a suction passage 54 extends through a horn 51 at an end portion of which is provided with an insulating wall 55 having one or a plurality of apertures 56. As a result, the contact area between the excrements and the end portion of the horn 51 can be increased so that the crushing efficiency can be significantly improved. Furthermore, a problem of clogging in the horn 51 with the crushed excrements can be overcome since the diameter of the aperture 56 at the front end portion is smaller than that of the suction passage. The thickness of the insulating wall 55 is 0.5 mm to 25 mm, preferably 1 mm to 10 mm. Fig. 5 shows an embodiment in which a suction passage 54 is opened in an outer peripheral surface of a rear end portion of a horn 51. According to this embodiment, the suction passage 54 opened in the outer peripheral surface is connected to a metal tube or a plastic tube arranged along the side portion of an ultrasonic operating instrument via a nipple (not shown). The crushed and emulsified tissue is directed outside the horn and discharged therefrom. The cross-sectional shape of the aperture 56 formed in the insulating wall 55 is not limited to particularly a circular one. It may be an oval shape as shown in Fig. 6A. Instead of one or a plurality of the apertures, a star-like shape aperture 57 or polygonal aperture may be provided. Embodiments shown in Figs. 8 to 10 have a purpose of protecting the anal wall from a damage when the horn is inserted into the rectum through the anus. In the Figs. 8 to 10 the insulation wall at the end of the suction passage is not shown. The shape of the end portion of a horn 33 shown in Fig. 8 presents a spheric one or an oval spheric one. The end portion of a horn 34 shown in Fig. 9 is tapered. Fig. 10 shows an embodiment in which the end portion of a horn 35 presents a shape obtained by combining a spherical shape and a tapered shape. Any of the above-described shapes makes it easy to insert the horn into the anus and to prevent the horn from damaging the anal wall. As a material of the horns described above, non-corrosive metal is preferable, such as titanium alloy, aluminum alloy or stainless steel. Furthermore, such material preferably must have a sufficient strength for ultrasonic vibration. Carbon fiber reinforced metal obtained by mixing metal such as aluminum and carbon fibers, carbon fiber reinforced plastic obtained by mixing polysulfone plastic and carbon fibers, and graphite can be used as the material. According to another embodiment shown in Figs. 11A and 11B, a protection cover 36 extends beyond an end portion of a horn 37. According to this, the end portion of the horn 37 (an insulation wall is omitted from the Fig.) which is mechanically vibrated in ultrasonic manner is prevented to contact with mucous membrane of the rectum wall. The cleaning liquid is injected into the excrements from an opening 39 formed at an end of the protection cover 36 through a tubular cleaning liquid passage 38 defined between the horn 37 and the protection cover 36. The excrements which has been crushed and emulsified by the ultrasonic vibration at the end portion of the horn 37 passes through the suction passage 25 to be discharged outside the patient's body. An end portion 40 of the protection cover presents a spherical shape, and a tapered shape for the purpose of facilitating insertion into the anus. The distance between an end of the opening 39 at the end portion of the protection cover 36 and an end of the horn 37 is 0.5 mm to 10 mm, preferably 1 mm to 5 mm in order to prevent the cleaning liquid from being directly sucked into the suction passage 25. A protection cover 41 of another embodiment shown in Fig. 12A is provided on an inner surface thereof with spiral grooves 42. The number of the spiral grooves is not limited particularly, but preferably 2 to 3 in terms of manufacturing easiness and smooth injection of the cleaning liquid from an end portion 45 of a protection cover 41. According to an embodiment shown in Fig. 13A, there is provided a plurality of axial slits 44 on an inner surface of a protection cover 43. The cross sectional shape and the number of the slits 44 are not limited particularly, but the cross section of the front portion of the protection cover 43 may preferably be a star-like shape as shown in Fig. 13B. These spiral grooves 42 and the slits 44 are preferably so sized that inner surfaces thereof bring into contact with an outer surface of a straight portion 46 of the horn 37. According to these embodiments, the cleaning liquid injected from the irrigation nipple which is screw mounted to irrigation Ripple thread 47 or 48 passes through a space defined between the horn 37 and the spiral groove 42 or the slit 44, and then is injected from the end portion 45 or 49 of the protection cover towards the excrements. Therefore, heat generated in the horn 46 due to the mechanical ultrasonic vibration thereof can be efficiently cooled down, and as well the protection cover 41 or 43 can hardly misalign with regard to an axis of the horn 37 when inserted into the anus. INDUSTRIAL APPLICABILITY According to the present invention, since the excrements in the rectum can be crushed, and sucked to be removed, evacuation can be efficiently completed with respect to the conventional excretion means. In addition, even if the excrements is hard, which is very difficult to be evacuated, a complete evacuation can be readily conducted in a short time period by the excretions treating apparatus according to the present invention. According to another aspect of the present invention, since the contact area between the horn and the excrements is increased by providing an insulating wall at the end portion of the horn, the excrements crushing efficiency can be improved, and thereby the evacuation efficiency also be improved. In addition, it is hardly to clog the suction passage formed in the horn with crushed excrements. The rectum wall can be protected from damage. Since the excretions treating apparatus according to the present invention is formed in a closed system insulated from the ambient air, any adverse effect on the ambient air such as bad odor or smell can be prevented.

Claims: An excretions treating apparatus for excrements in a rectum, said apparatus comprising: an insert (1) including a horn (2,33,34,35,37,51) capable of being mechanically vibrated by ultrasonic oscillation means (3,4,5) and a protection cover (13,36,41,43) disposed around said horn (2,33,34,35,37,51) to define therebetween a tubular space; a suction passage (25,54) provided within said horn (2,33,34,35,37,51) which opens at one end of said horn (2,33,34,35,37,51), an insulating wall (55) being disposed in an opening portion in said suction passage (25,54) at a front end thereof and being provided with one or more through apertures (56,57), the section of which being smaller than that of the suction passage (25,54); means (10,11,12) for excreting and removing excrements which have been crushed and emulsified, said excreting and removing means (10,11,12) being communicated with said suction passage (25,54), and irrigation means (6,7,8,9) communicated with said tubular space for injecting a cleaning liquid through said tubular space into the rectum. An apparatus according to claim 1, wherein said insulating wall (55) includes a plurality of through apertures (56,57), cross sections of which are circular, elliptic or polygonal. An apparatus according to claim 1, wherein said insulating wall (55) includes one through aperture (57), a cross section of which is starlike. An apparatus according to any one of claim 1 to 3, wherein said one end of said horn (33) presents a spheric shape. An apparatus according to claim 1, wherein said horn (2,33,34,35,37,51) is made of titanium alloy or aluminium alloy. An apparatus according to claim 1, wherein said protection cover (36,41,43) extends beyond said horn (37). An apparatus according to claim 1 or 6, wherein an end portion (40) of said protection cover (36,41,43) presents a spheric shape. An apparatus according to any one of claims 1, 6 and 7, wherein a plurality of spiral grooves (42) or a plurality of axial grooves (44) are provided on an inner peripheral surface of said protection cover (41,43). An apparatus according to any one of claims 1 and 6 to 8, wherein said protection cover (13,36,41,43) is made of plastic, synthetic rubber, natural rubber or a combination thereof. An apparatus according to claim 1, wherein said irrigation means (6,7,8,9) includes a pre-heater (8) for previously heating said cleaning liquid. An apparatus according to claim 1, wherein said excreting and removing means (10,11,12) includes a reservoir container (10) for excrements, in which a plastic bag is accomodated. An apparatus according to any one of the preceding claims, wherein said one end of said horn (34,35) is tapered.

Inventors: IDEMOTO MORITO, INOUE NAOHIKO, MIYAZAKI KAZUOKI, NOGUCHI YASUO, IDEMOTO, MORITO, INOUE, NAOHIKO, MIYAZAKI, KAZUOKI, NOGUCHI, YASUO
Applicants: SUMITOMO BAKELITE CO, SUMITOMO BAKELITE COMPANY LIMITED
Application year: 1988
Main classification: A61B17
IPC codes: A61B19, A61B17, A61M3, A61M1