The present disclosure relates generally to urine collection assemblies and methods for collecting urine and, more particularly, to a closed urine collection assembly and method of manufacturing a closed urine collection assembly utilizing a conventional catheter having a tapered funnel.
Intermittent urinary catheterization is a good option for many users who suffer from various abnormalities of the urinary system. A commonly encountered situation is where single use, individually packaged, sterile catheters are used. An important criterion for any single use product is the cost of the product, i.e., a less expensive product is desired and valued.
It is also common for catheters to be provided with a surface treatment using a lubricant to reduce friction in order to allow for easier and less traumatic insertion of the catheter. Currently, there are two major categories of catheters for the drainage of urine from the bladder which have lubricated surfaces, i.e., gel lubricated catheters and hydrophilic coated catheters.
The gel lubricated catheters are made easier to insert by application to the catheter surface of a water-based gel that can be applied by the user or health care provider, or more conveniently, it can be supplied with the packaged catheter. Typically, a system is provided with the packaged catheter to apply the gel to the surface of the catheter. This system may be one where the gel is placed on the catheter surface before or during the catheter packaging operation or one where the gel is applied to the catheter surface as the catheter is inserted by the user or health care provider.
In a hydrophilic coated catheter, the catheter is provided with a thin hydrophilic coating which is adhered to the outer surface of the catheter. When this coating is activated by swelling in contact with a hydrating agent such as water, it provides a surface having a lubricious and extremely low coefficient of friction. In earlier versions, a sterile, individually packaged single use catheter is provided in a dry state, and the user or health care provider opens the package and pours water into the package to hydrate the coating. After doing so, the user or health care provider would wait 30 seconds and remove the catheter from the package ready for insertion.
A more recent version of the hydrophilic coated catheter is where the catheter is provided in a package that already contains enough loose liquid water to cause it to be fully immersed. For this product, the user simply opens the package and removes the catheter ready for insertion without the need to add water and wait 30 seconds. Other products provide the amount of liquid water necessary for immersion of the catheter, e.g., in a separate compartment of the package. With these products, the separate compartment is opened to allow the liquid immersion water to enter the catheter-containing chamber for direct contact with the hydrophilic coated surface. Depending on the product, and on the amount of water in the separate chamber, the user may be asked to manipulate the package to bathe the catheter surface in the hydrating liquid in order to activate the hydrophilic coating on the catheter surface before the catheter is removed from the package ready for insertion by the user or health care provider.
Still more recently, the need for liquid immersion of a catheter having a hydrophilic coating or surface has been eliminated. In commonly owned U.S. Pat. No. 7,380,658, it is taught to use a vapor atmosphere within a package containing such a catheter in order to hydrate the hydrophilic coating or surface of the catheter. In some instances, it is desirable to have an entire urine collection assembly which includes both a catheter and a urine collection bag. Such a urine collection assembly makes it possible to have an entirely closed system wherein, following insertion of the catheter through the urethra and into the bladder, urine can be drained from the bladder through the catheter and directly into the urine collection bag. Following use of the urine collection assembly, the catheter can be withdrawn and the assembly can be discarded, e.g., after draining urine from the bag.
As will be appreciated, the provision of an entire urine collection assembly necessarily increases the overall cost. Since for most users it is necessary to undergo catheterization frequently, cost is an important factor to be taken into consideration. As a result, any possible reduction of cost of a urine collection assembly makes its use more desirable to more users.
In addition to cost, there are other factors that are important in providing a useful and desirable urine collection assembly. For instance, it would be desirable for such an assembly to comprise a closed system which thereby substantially eliminates any possibility of leakage at the juncture of the catheter and the collection bag. Also, it would be desirable to utilize a hydrophilic coating or surface on the catheter due to the highly lubricious nature of such coatings or surfaces and the ability to eliminate use of messy gels. Further, it would be desirable to avoid utilization of solvents or adhesives in the manufacture of a urine collection assembly in order to ensure potentially dangerous solvent or adhesive vapors are not present in the urine collection bag. Additionally, it would be desirable for the urine collection bag to include an anti-reflux feature and for the entire urine collection assembly to be such as to permit relatively compact packaging.
Accordingly, the disclosure is directed to a urine collection assembly comprising a catheter and a urine collection bag. The catheter has a proximal insertion end and a distal end having a portion of a tapered funnel integrally associated therewith. The portion of the tapered funnel associated with the distal end of the catheter comprises only a cylindrical barrel portion.
The urine collection bag has a cylindrical attachment port and the cylindrical barrel portion is sealed in the cylindrical attachment port. In this manner, urine being drained from the bladder by the catheter can pass directly into the urine collection bag through a sealed joint between the catheter and the urine collection bag. Preferably, the urine collection assembly including the catheter and urine collection bag is provided in a packaged, ready-to-use condition.
In an exemplary embodiment, the urine collection bag is formed of a flexible sheet material and the attachment port is sealed into the periphery of the urine collection bag. The flexible sheet material can advantageously comprise two generally rectangular sheets of EVA/polyethylene film sealed substantially entirely about the peripheral edges thereof except where the attachment port is located as will be explained in greater detail below. Further, the cylindrical attachment port is preferably a co-extruded tube which is formed to have an EVA outer surface and a PVC inner surface.
With the cylindrical attachment port formed in this manner, the cylindrical barrel portion which is also conventionally formed of PVC is preferably sealed to the inner surface of the co-extruded tube by spin welding.
In an exemplary embodiment, the catheter is disposed externally of the urine collection bag and includes a hydrated hydrophilic outer surface. Advantageously, the catheter can also include an introducer at or near the proximal insertion end of the catheter and a sleeve substantially covering the catheter. Still further, the urine collection assembly preferably includes an anti-reflux valve sealed to the cylindrical attachment port within the urine collection bag.
In another respect, the disclosure is directed to a method of manufacturing a urine collection assembly. The method includes the step of providing a catheter having a proximal insertion end and a distal end having a tapered funnel including a cylindrical barrel portion and a conical portion integrally associated therewith. It also includes the step of cutting off the conical portion of the tapered funnel and leaving only the cylindrical barrel portion of the tapered funnel integrally associated with the distal end of the catheter. In accordance with the method, a urine collection bag is provided having a cylindrical attachment port defining an opening sized to receive the cylindrical barrel portion of the tapered funnel in size for size fashion. The method also includes the step of placing the cylindrical barrel portion of the tapered funnel into the opening defined by the cylindrical attachment port in size for size fashion. The method further includes the step of sealing the cylindrical barrel portion of the tapered funnel within the opening defined by the cylindrical attachment port of the urine collection bag.
Preferably, the method includes the steps of forming the urine collection bag of a flexible sheet material and sealing the attachment port into the sheet material. It may also advantageously include the step of using two sheets of EVA/polyethylene film for the flexible sheet material and sealing the two sheets about the peripheral edges thereof. It may also preferably include the step of providing a co-extruded tube having an EVA outer surface and a PVC inner surface for the cylindrical attachment port. In addition, the method may advantageously include the cylindrical barrel portion being formed of PVC and the sealing step being performed by spin welding.
The spin welding step is preferably performed by holding the catheter in a stationary position and spinning the urine collection bag relative to the catheter. The spin welding step may advantageously include spinning the urine collection bag relative to the catheter at a rotational speed of between 1900 and 3000 RPMs. Also, the spin welding step preferably includes spinning the urine collection bag relative to the catheter for between 14 and 16 revolutions.
Preferably, the method further includes the step of providing the urine collection bag in a generally rectangular shape, folding the urine collection bag at least once generally perpendicular to the direction of the catheter, performing the spin welding step, folding the urine collection bag at least once in the direction of the catheter, and banding the urine collection bag in a folded condition.
As for other aspects of the method, it can include the step of providing an introducer at or near the proximal insertion end of the catheter and a sleeve substantially covering the catheter. Additionally, the method can include the step of sealing an anti-reflux valve to the cylindrical attachment port within the urine collection bag to prevent reverse urine flow into the catheter.
In addition to the foregoing, the method can also comprise providing a packaged ready-to-use urine collection assembly which includes the step of providing a catheter having a hydrophilic outer surface to be hydrated prior to using the catheter, providing a gas impermeable package capable of receiving the catheter and the urine collection bag therein, placing the catheter, the urine collection bag and a hydrating agent into the gas impermeable package, and sealing the gas impermeable package with the catheter, the urine collection bag and the hydrating agent therein.
Other objects, advantages and features of the present disclosure will become apparent from a consideration of the following specification taken in conjunction with the accompanying drawings.
In the illustrations given, and with reference first to
The urine collection bag 22 can be formed of flexible sheet material with the attachment port 24 sealed into the sheet material. The flexible sheet material can comprise two sheets of EVA/polyethylene film sealed about the peripheral edges thereof. The cylindrical attachment port 24 can be a co-extruded tube formed to have an EVA outer surface and a PVC inner surface. Alternatively, it will be understood that other suitable materials now known or hereafter discovered may be suitable for use.
It is advantageous to utilize these materials for the flexible sheet material and the cylindrical attachment port 24. By utilizing EVA/polyethylene film, the flexible sheet material of the urine collection bag 22 is easy to seal substantially entirely about the peripheral edges thereof, and the cylindrical barrel portion 18 may suitably comprise a portion of a tapered funnel such as 20 which is conventionally formed of PVC. As a result, the cylindrical barrel portion 18 and inner surface of the cylindrical attachment port 24 may be formed of PVC.
Since these like materials are utilized and will be in confronting relation when the cylindrical barrel portion 18 is inserted into cylindrical attachment port 24 during manufacture of the urine collection assembly 10, it is possible to utilize spin welding to seal the cylindrical barrel portion 18 within the cylindrical attachment port 24 to these components together while eliminating the need for the use of adhesives or solvents that can produce harmful vapors.
As will be appreciated, the catheter 12 is disposed externally of the urine collection bag 22 in a ready-to-use position after the cylindrical barrel portion 18 has been sealed within the cylindrical attachment port 24. The catheter 12 may advantageously include a hydrated hydrophilic outer surface to further enhance the desirability of the urine collection assembly 10 by ensuring it is ready-to use without any preliminary preparation. Further, the catheter 12 may include an introducer 26 at or near the proximal insertion end 14 of the catheter 12, and it may also include a sleeve 28 substantially covering the catheter 12 to facilitate no-touch handling. The sleeve 28 may be made from polyurethane or other suitable materials now known or hereafter discovered.
Referring to
Further, and still referring to
With the arrangement illustrated in
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As illustrated in
By folding the urine collection bag 22 in this manner, and utilizing a band 44 to hold it in the folded condition, the urine collection assembly 10 can assume a long, narrow profile suitable for utilizing a long, narrow and compact package such as 40.
In another respect, the present disclosure is directed to a method of manufacturing a packaged ready-to-use urine collection assembly 10. The method comprises the step of providing a catheter 12 having a proximal insertion end 14 and a distal end 16 wherein the catheter 12 can have a hydrophilic outer surface to be hydrated prior to use. The distal end 16 of the catheter 12 is provided with a tapered funnel 20 (
In addition to the foregoing, the method can include the step of providing a gas impermeable package 40 capable of receiving the catheter 12 and the urine collection bag 22 therein, the step of placing the catheter 12, the urine collection bag 22 and a hydrating agent into the gas impermeable package 40, and the step of sealing the gas impermeable package 40 with the catheter 12, the urine collection bag 22 and the hydrating agent therein to complete the ready-to-use assembly.
The method can include the steps of forming the urine collection bag 22 of a flexible sheet material and sealing the attachment port 24 into the sheet material. It can also include the step of using two sheets of EVA/polyethylene film for the sheet material and sealing the two sheets about the peripheral edges 32. It can also include the step of providing a co-extruded tube for the cylindrical attachment port 24 formed with an EVA outer surface and PVC inner surface.
Preferably, the cylindrical barrel portion 18 of the tapered funnel 20 is formed of PVC and the cylindrical barrel portion 18 is sealed within the opening defined by the cylindrical attachment port 24 by spin welding. Still additionally, the spin welding step is advantageously performed by holding the catheter 12 in a fixed or stationary position and then causing the urine collection bag 22 to spin relative to the stationary catheter 12.
The spin welding step can include spinning the urine collection bag 22 relative to the catheter 12 at a rotational speed of between 1900 and 3000 RPMs, depending upon the size of the catheter, and spinning the urine collection bag 22 relative to the catheter 12 for between 14 and 16 revolutions, again depending upon the size of the catheter.
The step of providing a urine collection bag 22 may include providing it in a generally rectangular shape, folding the urine collection bag 22 at least once in the direction of the catheter 12, folding the urine collection bag 22 at least once generally perpendicular to the direction of the catheter 12, performing the spin welding step, again folding the urine collection bag 22 in the direction of the catheter 12, and banding the urine collection bag 22 with a band 44 in a folded condition for placement a package such as 40.
In this connection,
After the cylindrical barrel portion 18 of a tapered funnel 20 on a catheter 12 has been sealed to the inner surface of the cylindrical attachment port 24 by spin welding (
Further aspects of the method can include the steps of providing an introducer 26 at or near the proximal insertion end 14 of the catheter 12 and a sleeve 28 substantially covering the catheter 12. The method can also include the step of sealing an anti-reflux valve 30 at a location within the urine collection bag 22 to the cylindrical attachment port 24 and/or sealing the anti-reflux valve 30 to the urine collection bag 22 such as by the seals 32a and 32b. Still further, the method can include the step of providing liquid water as the hydrating agent in the package 40 and including isolating the liquid water from the hydrophilic outer surface of the catheter.
When isolated liquid water is used as the hydrating agent, the method still additionally includes the step of delaying distribution of the gas impermeable package 40 before use of the catheter 12 for a period of time sufficient: i) to form a 100% relative humidity atmosphere within the sealed gas impermeable package 40, and ii) for the hydrophilic outer surface of the catheter 12 to be hydrated so the catheter 12 is ready for use.
Referring to
Referring to
After the conical portion 46 of the funnel 20 has been cut off, the cutting element 74 is withdrawn into the guard 76 and the station 68 is dropped down (as shown in
Referring to
While the foregoing sets forth a detailed description of the urine collection assembly and method of the present disclosure, it will be appreciated that the scope of protection is only to be limited by the appended claims.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US2012/028862 | 3/13/2012 | WO | 00 | 4/7/2014 |
Number | Date | Country | |
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61467679 | Mar 2011 | US |