Patent Publication Number: US-2023143263-A1

Title: Method and a receptable bag for emptying a urinary bag

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/333,167, filed on Mar. 13, 2019, issuing as U.S. Pat. No. 11,547,597, which is a National Phase entry, under 35 U.S.C. Section 371(c), of International Application No. PCT/IB2017/055548, filed Sep. 14, 2017, claiming priority from European Patent Application No. 16250014.4, filed Sep. 14, 2016. The disclosures of the prior US Application and the International Application are incorporated herein by reference in their entirety. 
     FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not Applicable 
    
    
     BACKGROUND 
     The present invention relates to a method and a receptacle bag for emptying a urinary drainage bag and a drainage bag system for urinary collection. 
     In urinary catheterization, a latex, polyurethane, or silicone tube known as a urinary catheter is inserted into a patient&#39;s bladder via the urethra, or via suprapubic catheterization. Alternatively, the catheterization may also take place with placement of a urisheath (condom type catheter). Catheterization allows the patient&#39;s urine to drain freely from the bladder for collection, measuring of volume, monitoring, and analysis. In a closed urinary drainage system, the catheter extends to a urinary drainage bag where its end is coupled to an inlet of a collecting compartment of the urinary drainage bag for collecting the urine in the collecting compartment of the urinary drainage bag. 
     The urinary drainage bag can typically hold between 0.5 liter to 5 liters of urine. When the urinary drainage bag is full, or emptied for other reasons, it is in a first alternative example replaced by a new and empty urinary drainage bag by removing the catheter from the inlet of the filled urinary drainage bag and placing the catheter on an inlet of the new urinary drainage bag. 
     In a second alternative example the urinary drainage bag comprises an outlet through which urine in the compartment of the urinary drainage bag can flow out of. An outlet valve regulates flow of urine out through the outlet. In the second alternative example the urinary drainage bag is emptied by having the outlet valve in an open state. In the second alternative example urine can also be taken from the urinary drainage bag for testing, for measuring of volume and analysis. 
     Examples of catheter systems and urinary drainage bags are described in the below patent applications and patents to which reference is made and which are hereby incorporated in the present application by reference. The references comprise: WO16008493, WO15067270, WO06110695, U.S. Pat. Nos. 5,116,139, 5,531,726 WO02094128, U.S. Pat. No. 3,497,152, and WO9739705. 
     SUMMARY 
     The emptying of the urinary drainage bag is a non-sterile process and it is an object of the present invention to improve the emptying of the urinary drainage bag such that the emptying becomes more hygienic and safe for the nursing staff and patients with less risk of infection. It is a second object of the present invention that the emptying becomes sterile. It is also an object of the object of the present invention to dispense of the collected urine in the urinary drainage bag via waste handling methods. It is a further object of the present invention to shield and protect the urine drainage bags&#39; outlet, which is important for overall hygiene reasons. 
     The above object and advantages together with numerous other objects and advantages, which will be evident from the description of the present invention, are according to a first aspect of the present invention obtained by: 
     A drainage bag system for urinary collection comprising: 
     a urinary drainage bag comprising a first inlet and an inlet valve for regulating a flow of urine from a catheter into said urinary drainage bag via said first inlet, an outlet and an outlet valve for regulating a flow of urine out of said urinary drainage bag; and 
     a receptacle bag of a foil or sheet material for emptying said urinary drainage bag comprising a receptacle compartment for storing urine, and a connector for providing a connection between said receptacle bag and said urinary drainage bag, said connector providing a second inlet constituting a receptacle inlet to said receptacle compartment when connected to said receptacle bag such that urine can flow into said receptacle compartment. 
     The receptacle bag may be made from a first foil and a second foil being welded together, i.e., placing the first foil on top of the other and welding them together. The welding is placed proximate the edges of the foils, which means that the welding is between 0-15 mm from the edges. The foils may be thin polyethylene foils having a thickness between 0.01-0.2 mm. The welded foils have an inner side constituting a side of the receptacle compartment and an outer side facing away from the receptacle bag. 
     The foils may have a flat rectangular shape. The first foil may comprise a number of foil layers and the second foil may comprise a number of foil layers. 
     The receptacle bag may be formed by stretch blow moulding a preform. The preform may be formed in an injection moulding process. In the stretch blow moulding process, the preform is heated above its glass transition temperature and blown, using high pressure air, such that a container part is expanded. The expanded container part constitutes the receptacle compartment. The preform comprises the connector for connection to the urine drainage bag. The preform may be made from polyethylene. 
     The receptacle bag may be made from a fibrous pulp material by forming two paperboard sheets, which may be glued together. An alternative material for the receptacle bag could be other organic based materials. The receptacle bag can also be formed through the use of a vacuum forming process. 
     The receptacle bag may comprise a receptacle valve for regulating the flow of urine into the receptacle compartment via the receptacle inlet. When the receptacle valve is in an open state, fluid can flow into the receptacle compartment through the passageway and when the receptacle valve is in a closed state, the passageway is blocked and fluid is prevented from flowing out of the receptacle compartment. 
     The receptacle valve may be a non-return valve for allowing fluid to flow in only one direction, the direction being into the receptacle compartment. Fluid pressure from the receptacle valve side facing the receptacle compartment results in the receptacle valve closing and fluid pressure from the opposite side results in the receptacle valve opening. When the urinary drainage bag is placed higher than the receptacle bag, gravity alone may act on the urine in the urinary drainage bag causing the urine to flow out of the urinary drainage bag and putting pressure on the receptacle valve such that the receptacle valve opens where after the urine flows further down into the receptacle compartment. 
     The receptacle compartment is a pouch or a pocket forming an enclosed space for storing urine emptied from the urine drainage bag comprising a volume between 0.5 liter to 5 liter. The receptacle compartment may have a larger volume than the urinary drainage bag. A small urinary drainage bag with respect to a receptacle bag may be emptied a number of times into the receptacle bag. For example, a one liter urinary drainage bag may be emptied five times into a five liter receptacle bag before the receptacle bag is brought to waste handling. Alternatively, the receptacle bag may extend the overall capacity of the system such that a receptacle bag of five liter and a urinary drainage bag of five liter provides for a system with a capacity of five liter in total. 
     The connector may comprise a flexible and firm material such as silicone, PVC or PVC-free alternative materials, etc. The connector may be manufactured separate from the receptacle bag and attached to the receptacle bag by nursing staff, or it may be attached to the receptacle bag during manufacturing of the receptacle bag. 
     The connector may be formed as a longitudinal tube. The connector may be manufactured separate from the receptacle bag and attached to the receptacle bag by nursing staff, or it may be attached to the receptacle bag during manufacturing of the receptacle bag. 
     Alternatively, the connector may be formed in a two-shot molding process, wherein two separate materials are incorporated into one part. A first part of the connector may be made from a first material for coupling to the receptacle bag and a second part of the connector may be made from a second material for coupling to the outlet. The second material is preferably softer than the first material. 
     A proximal end of the connector with respect to the receptacle bag may be formed as a female funnel. A female funnel has an increasing circumference or radius as the funnel comes towards its end. A distal end of the connector may be formed as a female funnel. The distal end of the connector goes around the outlet tube. The shape of the distal end of the connector may complement or counterpart the shape of the outlet tube such that the distal end can engage the outlet tube. 
     The distal end may be placed around the outlet or the outlet valve of the urinary drainage bag soon after a patient has been fitted with a closed urinary drainage system and even before any urine has been collected in the urinary drainage bag. In this way the connector may shield the outlet or the outlet valve of the urinary drainage bag and protect against drainage or infection up though the outlet or the outlet valve. The distal end of the connector may provide tension with respect to the outlet or the outlet valve. The distal end of the connector may stretch around the outlet. 
     The outlet of the urinary drainage bag may project from the urinary drainage bag in the form of an outlet tube. The outlet tube has an outlet passageway for fluid communication between a proximal end and a distal end of the outlet tube with respect to a collecting compartment of the urinary drainage bag such that fluid can flow out of the collecting compartment. The distal end of the outlet tube may have a conical shape or a male funnel shape. 
     The flow of fluid through the outlet passageway is regulated by the outlet valve of the urinary drainage bag. When the outlet valve is in an open state fluid can flow out of the urinary drainage bag through the outlet passageway and when the outlet valve is in a closed state the outlet passageway is blocked and fluid is prevented from flowing out of the urinary drainage bag. The outlet valve may be operated manually between the open state and the closed state. The outlet valve may be a cross valve. The cross valve comprises a stem and a gate. A handle can be actuated for moving the gate from a closed position to an open position and vice versa. In an alternative solution the cross valve of the urinary drainage bag is substituted by a pull-push opening or another valve type, such as a finger flip or leaver tap. Theses valve type would likewise be possible to insert into the female funnel of the receptacle bag. 
     According to a further embodiment, a fluid absorbent powder is placed in the receptacle compartment by filling it through a pipe down through the receptacle valve before the connector is coupled to the outlet, i.e., before the receptacle bag is interconnected with the urinary drainage bag. In this way the receptacle bag can be produced as a finished entity with the receptacle valve where after the fluid absorbent powder can be placed in the receptacle compartment after the receptacle bag has been produced, in the form of lose powder or a long sleeve/pouch. The receptacle bag may comprise the pipe for passing the fluid absorbent powder through the first inlet and into the receptacle compartment. The receptacle valve prevents the fluid absorbent powder to come out of the receptacle bag again. 
     In an embodiment the fluid absorbent powder is a super absorbent polymer or slush powder, which are polymers that can absorb and retain large amounts of a liquid relative to their own mass. It is likewise possible to use an organic material having similar properties. 
     The fluid absorbent powder may also be provided in a sachet that that dissolve when it comes into contact with a liquid. 
     The fluid absorbent powder reacts with the urine when the powder and the urine meet in the receptacle compartment. The reaction results in a gel or a substance with a higher viscosity than the viscosity of the urine. In an embodiment the fluid absorbent powder absorb aqueous solutions such as urine through hydrogen bonding with water molecules. 
     The fluid absorbent powder stabilizes the urine that has been emptied from the urinary drainage bag and filled into the receptacle compartment of the receptacle bag. The receptacle bag may then be transported to a waste handling facility or to further processing of the patients collected urine output. 
     The receptacle compartment may contain urine comprising cancer drug. In an embodiment the receptacle bag comprises a barrier around the receptacle compartment for reducing radiation from cancer drug in the urine waste. 
     According to a further embodiment, the receptacle bag comprises a hanger for hanging the receptacle bag on the urinary drainage bag by placing it at a lower height than a height of the urinary drainage bag. 
     The hanger may be a lanyard or a cord or a string. As the outlet valve is opened gravity may force the urine from the urinary drainage bag down into the receptacle bag. As the urinary drainage bag is emptied and the receptacle bag is filled the nursing staff does not have to support the increasing weight of the receptacle bag. 
     The hanger may provide tension between the receptacle bag and the urinary drainage bag such that the connector is less likely to fall off. 
     The receptacle bag is provided with one or more holes such as two, three or four holes. The one or more holes are located along a first side of the receptacle bag corresponding to a side comprising the receptacle inlet. The hanger extends through the holes and may form a ring or have two ends that can be tied together for forming a closed ring. 
     The hanger may comprise a handle for holding the receptacle bag with such that nursing staff can carry the receptacle bag from bedside to waste handling point thereby not having to touch the receptacle bag. 
     In an embodiment the hanger comprises a tie-knot for adjusting the length of the hanger. A width of the hanger is between 2 mm-6 mm for twisting the hanger and adjusting the length via the twisting. 
     According to a further embodiment the hanger is supported by the outlet valve. The hanger may be tied to the outlet valve or placed around the outlet valve. This provides for a simple procedure for the nursing staff to attach the receptacle bag to the urinary drainage bag, especially in embodiments where the outlet valve comprises a cross valve. 
     According to a further embodiment the connector is removed from the outlet and a closure is placed on the connector for closing a passageway into the receptacle compartment. This provides added safety from drainage during transport of a filled receptacle bag. The closure may be a plug or spigot that fits tightly in the passageway. The closure may be a separate entity or attached to the receptacle bag. In an embodiment the closure is attached to the hanger or to a lanyard or string attached to the receptacle bag. 
     In an embodiment the receptacle bag may comprise a first tube coupled to the receptacle inlet. The first tube is coupled or connected to the receptacle inlet and projects from the receptacle bag. The first tube has a first conduit for fluid communication between a proximal end and a distal end of the first tube such that fluid can flow through the first tube and into the passageway of the receptacle inlet. The distal end of the first tube may have a conical shape or a male funnel shape. A male funnel has a decreasing circumference or radius as the funnel comes towards its end. The connector may be coupled to the first tube at a proximate end of the connector. 
     According to a second aspect of the present invention the above objects and advantages are obtained by: 
     A method for emptying a urinary drainage bag, comprising the steps of: 
     providing a urinary drainage bag comprising a first inlet and an inlet valve for regulating a flow of urine from a catheter into said urinary drainage bag via said first inlet, said urinary drainage bag further comprising an outlet and an outlet valve for regulating a flow of urine out of said urinary drainage bag; 
     providing a receptacle bag of a foil or sheet material for emptying said urinary drainage bag comprising a receptacle compartment for storing urine, and a connector for providing a connection between said receptacle bag and said urinary drainage bag, said connector providing a second inlet constituting a receptacle inlet to said receptacle compartment when connected to said receptacle bag such that urine can flow into said receptacle compartment; and 
     connecting said connector to said outlet and opening said outlet valve for providing a flow of urine out of said urinary drainage bag and into said receptacle bag. 
     According to a third aspect of the present invention the above objects and advantages are obtained by: 
     A receptacle bag of a foil or sheet material for emptying a urinary drainage bag, comprising a receptacle compartment for storing urine emptied from the urinary drainage bag, and a connector for providing a connection between said receptacle bag and said urinary drainage bag, said connector providing a second inlet constituting a receptacle inlet to said receptacle compartment when connected to said receptacle bag such that urine can flow into said receptacle compartment. 
     According to a fourth aspect of the present invention the above objects and advantages are obtained by: 
     A drainage system for wound drainage comprising: 
     a receptacle bag ( 26 ) of a foil or sheet material for collecting liquid from said wound, and a polymer tube between said wound and said receptacle bag, said receptacle bag encompassing a receptacle compartment ( 28 ) for storing said liquid, a receptacle inlet into said receptacle compartment, said receptacle inlet constituted by a connector having a distal end with respect to said receptacle compartment, said distal end defining a female funnel for receiving said polymer tube, said polymer tube having a first tube end, and a second tube end, said polymer tube extending with a length of more than 0.5 m between said first tube end, and said second tube end, said first tube end defining a male funnel placed in said female funnel, said second tube end comprising a male Luer lock fitting. 
     The invention will be explained in more detail below in connection with advantageous embodiments of the invention with reference to the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    shows the principal of a traditional closed urinary drainage connected to the patient. 
         FIG.  2    is a perspective view of an embodiment of a receptacle bag for emptying a urinary drainage bag. 
         FIG.  3    is a perspective view of a receptacle bag connected to a urinary drainage bag. 
         FIG.  4    is a perspective view of a closed urinary drainage and a receptacle bag after the contents of the urinary drainage bag have been transferred to the receptacle bag. 
         FIG.  5    is a perspective view of a receptacle bag in its packaging wherein the packaging is partly opened to allow the receptacle bag to be connected with a urinary drainage bag. 
         FIG.  6    is a perspective view of an embodiment of a receptacle bag. 
         FIG.  7    is a perspective view of an enlarged section of an embodiment of a receptacle bag. 
         FIG.  8    is a perspective view of an embodiment of a preform of a receptacle bag. 
         FIG.  9    is a perspective view of an embodiment of a receptacle bag. 
         FIG.  10    is a perspective view of an embodiment of a preform of a receptacle bag. 
         FIG.  11    is a perspective view of an embodiment of a preform of a receptacle bag. 
         FIG.  12    is a perspective view of an embodiment of a receptacle bag for wound drainage. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout. Like elements will, thus, not be described in detail with respect to the description of each figure. 
       FIG.  1    shows a traditional closed urinary drainage connected to a patient  10 . A catheter  12  extends to a urinary drainage bag  14  where its end is coupled to a first inlet  16  to a collecting compartment  18  of the urinary drainage bag  14  for collecting urine  20  in the collecting compartment  18  of the urinary drainage bag  14 . It should be noted that the dimension and position of the urinary drainage bag  14  in  FIGS.  1 ,  3 , and  4    are not actually proportions of the urinary drainage bag  14  or receptacle bag  26 , but are used for the purpose of showing in which context the invention is used. 
     The collecting compartment  18  is a pouch or a pocket forming an enclosed space for collecting urine comprising a volume between 0.5 liter to 5 liters. 
     The outlet  22  of the urinary drainage bag  14  projects from the urinary drainage bag  14  in the form of an outlet tube. The outlet tube has an outlet passageway for fluid communication between a proximal end and a distal end of the outlet tube with respect to a collecting compartment  18  of the urinary drainage bag  14  such that fluid can flow out of the collecting compartment. The distal end of the outlet tube has a conical shape (male funnel shape). 
     The flow of fluid through the outlet passageway is regulated by the outlet valve  24 . When the outlet valve  24  is in an open state fluid can flow out of the urinary drainage bag  14  through the outlet passageway and when the outlet valve  24  is in a closed state the outlet passageway is blocked and fluid is prevented from flowing out of the urinary drainage bag  14 . The outlet valve  24  may be operated manually between the open state and the closed state. The outlet valve  24  may be a cross valve. The cross valve comprises a stem and a gate. A handle can be actuated for moving the gate from a closed position to an open position and vice versa. 
       FIG.  2    is a perspective view of an example of a receptacle bag  26  for emptying the urinary drainage bag  14 . In the example shown in  FIG.  2    the receptacle bag  26  has been made by welding two rectangular PE foils together. The foils are welded together 0.2 mm to 1 cm from the edge of the foils. 
     In the top of the receptacle bag a first tube  32  has been welded on in order to provide for a passageway into a receptacle compartment  28  for storing urine emptied from the urinary drainage bag  14 . 
     The receptacle compartment  28  comprises a fluid absorbent powder  30  for stabilizing urine. The fluid absorbent powder was placed in the receptacle bag  26  via a pipe. 
     The receptacle bag  26  comprises a receptacle valve (not shown) for regulating a flow of urine from the urinary drainage bag into the receptacle compartment  28 . 
     The receptacle bag  26  was made with a hanger  40  for hanging the receptacle bag  26  on the urinary drainage bag  14 . The hanger  40  is a lanyard. A closure  42  for closing a passageway into the receptacle bag was attached to the hanger  40 . The closure comprises a closure end  44  in the form of a plug, which has a conical shape and is tapered. 
     A connector  34  is coupled to the receptacle inlet via a first tube  32 . The connector  34  comprises a first end  36  for engaging with the first tube  32  and a second end  38  for engaging with an outlet  22  or an outlet valve  24  of the urinary drainage bag  14 . The first end  36  comprises a female funnel for placement around the first tube  32 . The second end  38  comprises a female funnel for placement around the outlet  22  or the outlet valve  24  of the urinary drainage bag. 
     In another example the connector  34  and the first tube  32  are made as an integral unit in one piece that can be coupled to the receptacle bag in a welding process. The connector  34  provides a passageway into the receptacle compartment. The connector  34  extends from the receptacle bag  26  and has a free end in the shape of a female funnel at the second end  38 . 
       FIG.  3    is a perspective view of the receptacle bag  26  connected to the urinary drainage bag  14 . The outlet valve  24  is set to an open state such that urine can flow from the collecting receptacle compartment  18  of the urinary drainage bag  14  through the outlet  22  and into the receptacle compartment  28  of the receptacle bag  26 . As the urine flows into the receptacle compartment  28  it reacts with the fluid absorbent powder  30 . The reaction results in a gel or a substance with a higher viscosity than the viscosity of the urine. 
     The hanger  40  is a lanyard or a cord or a string. As the outlet valve  24  is opened gravity may force the urine from the urinary drainage bag  14  down into the receptacle compartment  28  of the receptacle bag  26 . As the urinary drainage bag  14  is emptied and the receptacle compartment  28  is filled the nursing staff does not have to support the increasing weight of the receptacle bag. 
     The receptacle bag  26  is provided with one or more holes such as two, three or four holes. The one or more holes are located along a first side of the receptacle bag corresponding to a side comprising the receptacle inlet. The lanyard extends through the holes and may form a ring or have two ends that can be tied together for forming a closed ring. 
     The lanyard comprises a tie-knot for adjusting the length of the lanyard. A width of the lanyard is between 2 mm-6 mm for twisting the lanyard and adjusting the length via the twisting. The lanyard is placed around the outlet valve. The outlet valve is a cross valve. 
     The distal end of the connector is placed around the distal end of the outlet tube such that urine from the drainage bag may be funneled into the receptacle bag. This reduces the risk of spillage from where the outlet tube and the connector overlap each other. This would be the case where a separate adapter is used to interconnect the drainage bag and the receptacle bag. The system comprising the drainage bag and the receptacle bag consist of one single overlap of interconnected tubes, i.e., the connector is integral with the receptacle bag, and it is placed directly over the outlet tube of the drainage bag, and there are no adapters. 
       FIG.  4    is a perspective view of the closed urinary drainage and the receptacle bag  26  after the content of the urinary drainage bag  14  have been emptied into the receptacle bag  26 . 
     The closure  42  is placed the connector  34  for closing a passageway in the connector  34  and to provide added safety from drainage during transport of a filled receptacle bag. 
     The closure  42  is a plug having a conical shape that fits tightly in the passageway of the connector  34 . 
       FIG.  5    is a perspective view of a receptacle bag  26  in its packaging  46  wherein the packaging  46  is partly opened to allow the connector  34  to extend out of the packaging and be connected with the urinary drainage bag  14 . The packaging comprises a mark for indicating a part of the packaging to be opened. The mark is located between a first side  48  and a second side  50 . The first side  48  being opposite the second side  50 . The difference between the distance from the mark to the first side  48  and the distance from the mark to the second side  50  is less than 20%. The receptacle bag  26  is placed in the packaging  46  with connector  34  located between the first side  48  and the second side  50  and closer to the mark than to the first side  48  or the second side  50 . 
     The urinary drainage bag  14  comprises a cross valve which together with the outlet tube from the urinary drainage bag has a cross shaped cross section. The cross valve comprises a first arm  52  and a second arm  54 . The first arm extends a first distance from the outlet tube and the second arm extends a second distance from the outlet tube. The first distance and the second distance are at least 0.5 cm. 
       FIG.  6    is a perspective view of an example of a receptacle bag  26  for emptying the urinary drainage bag  14 . A distal end of the outlet tube with respect to the urinary drainage bag comprises a female part  56  of a bayonet coupling for coupling with a male part  58  on the second end  38  of the connector  34 . The section of  FIG.  6    surrounded by a dashed circle is shown as an enlarged section in  FIG.  7   . In an alternative embodiment (not shown), the male part is formed inside the second end of the connector  34  allowing the second outlet  22  of the urinary drainage bag to be inserted into the connector  34  of receptacle bag  26 , whereby the second outlet  22  is rotated, e.g., 45 degrees, for obtaining a connection between the receptacle bag  26  and the urinary drainage bag  14 . 
       FIG.  7    is a perspective view of an enlarged section of the section encircled by a dashed circle in  FIG.  6   . The enlarged section shows female part  56  of a bayonet coupling for coupling with a male part  58  on the second end  38  of the connector  34 . 
       FIG.  8    is a perspective view of an example of a preform  60  of a receptacle bag to be produced in a stretch blow moulding process. The preform comprises a container part  64  and a neck  62 . The preform  60  is formed in an injection moulding process. In the stretch blow moulding process the preform is heated above its glass transition temperature and blown, using high pressure air, such that the container part is expanded. The neck  62  comprises the connector  34  for connection to a urine drainage bag. It should be noted that a non-return valve is not shown in  FIG.  8 - 11   . 
       FIG.  9    is a perspective view of an example of a receptacle bag  26  that has been produced in a stretch blow moulding process. The receptacle bag  26  comprises a neck  62  and a receptacle compartment  18 . The neck  62  comprises the connector  34  for connection to a urine drainage bag. 
       FIG.  10    is a perspective view of an example of a preform  60  of a receptacle bag to be produced in a stretch blow moulding process. The preform  60  comprises a closure  42  at distal end of a tether  66 . The tether comprises a loop  68  at a proximal end of the neck  62  for placement around the neck  62  of the preform  60 . 
       FIG.  11    is a perspective view of an example of a preform  60  of a receptacle bag to be produced in a stretch blow moulding process. The preform comprises a tether  66  and a hanger  40 . The tether comprises a loop  72 . A distal end  70  of the hanger  40  comprises an anchor for placement in the loop  72 . 
       FIG.  12    is a perspective view of a drainage system for wound drainage such as drainage of abdominal, chest or thorax-related excess bodily fluids. A catheter is placed in the wound and may lead to a three-way valve (not shown) or 3-way stop cock. The stop cock has three ports (openings connected to each other via an internal tubing). The catheter is inserted into the first port. The second port is a center port with a needleless connector for taking samples of the bodily fluid, and the third port is a connection  68  to a tube  66  leading to a receptacle bag  26  as described above. 
     The tube  66  is a polymer tube having a first tube end, and a second tube end. The polymer tube has a length between 0.2 m to 2 m, such as 0.5 to 1 m, and, preferably, 0.5 m. 
     The receptacle bag  26  comprises a receptacle compartment for storing the liquid. It has a receptacle inlet into said receptacle compartment. The receptacle inlet is constituted by a connector having a distal end with respect to the receptacle compartment. The distal end defines a female funnel for receiving the polymer tube, i.e., the first tube end defines a male funnel which is placed in the female funnel. The receptacle bag may contain a volume between 1-2 liters. 
     The second tube end comprises a male Luer lock fitting  68  for connecting to a female Luer on a stop cock (not shown). The male Luer lock fitting comprises an internal thread. 
     In the following is a list of reference signs that are used in the detailed description of the invention and the drawings referred to in the detailed description of the invention.
       10  Patient     12  Catheter     14  Urinary drainage bag     16  First inlet     18  Collecting compartment     22  Outlet     24  Outlet valve     26  Receptacle bag     28  Receptacle compartment     30  Fluid absorbent powder     32  First tube     34  Connector     36  First end     38  Second end     40  Hanger     42  Closure     44  Closure end     46  Packaging     48  First side     50  Second side     52  First arm     54  Second arm     56  Female part     58  Male part     60  Preform     62  Neck     64  Container part