Special receptacle or package – For a tool – Body treatment
Patent
1999-04-26
2000-05-09
Sewell, Paul T.
Special receptacle or package
For a tool
Body treatment
206210, 604265, B65D 8508
Patent
active
060591072
DESCRIPTION:
BRIEF SUMMARY
This invention related to a Urinary catheter assembly comprising a urinary catheter having on at least a part of its surface a hydrophilic surface layer intended to produce a low-friction surface character of the catheter by treatment with a liquid swelling medium prior to use of the catheter and a catheter package having a cavity for accommodation of the catheter.
Urinary catheters of the kind to which the invention pertains are known, inter alia, from EP-A-0 217 771, EP-A-0 586 324 and WO 94/16747, whereas various forms of catheter packages are known from U.S. Pat. Nos. 3,035,691, 3,648,704, 3,967,728, 4,204,527, 4,379,506, 5,226,530, 5,454,798, GB-A-2,284,764, EP-A-0 677 299 and DK Design Registration No. 0932 1986.
U.S. Pat. Nos. 3,648,704, 3,967,728, GB-A-2,284,764 and EP-A-0 677 299 discloses a conventional urinary catheter assembly comprising a catheter of the kind where prior to insertion of the catheter into the urethra the tip of the catheter is to be lubricated with a gel-like lubricant and a package where such a lubricant is accommodated in a rupturable pouch connected or located within the package itself adjacent to the tip of the catheter or is supplied together with the catheter package for connection therewith prior to use of the catheter.
U.S. Pat. No. 5,226,530 discloses a prelubricated catheter and package assembly, in which a urinary catheter prelubricated with a conventional lubricant is accommodated in a package comprising a first receptacle for stowing the catheter and inside said receptacle a secondary receptacle for receiving the projecting or distal end of the catheter to the tip of which the lubricant is applied. The two receptacles are wrapped in an outside enclosing receptacle the contents of which can be sterilized in a suitable manner.
The use of a sequence of three receptacles which must all be opened before use of the catheter makes the operation unduly difficult for disabled users, such as tetraplegics or sclerosis patients.
An important feature of any urinary catheter used for intermittent catherisation of the bladder of an incontinent user is the ability of the catheter to slide easily through the urethra without exposing the urethral walls to any risk of damage. Catheters of the kind to which the inventions pertains have been developed to meet this need by imparting an extremely low friction character to at least the part of the surface of the catheter which is actually introduced into the urethra. The low friction surface character is obtained by incorporating into the relevant part of the catheter at least a hydrophilic surface layer, typically in the form of a coating, and exposing this layer or coating to contact with a liquid swelling medium immediately prior to use.
In order to maintain the low friction surface character during location of the catheter in the urethra and subsequent withdrawal therefrom and hereby reduce stinging pain it is further known to incorporate an osmolality promoting agent, such as NaCl, in the hydrophilic coating.
When catheters of this kind are used directly by end users outside the medical environment of a hospital or a clinic, e.g. by tetraplegic patients who often have a very poor dexterity, and therefore need a very simple insertion procedure, the most common liquid swelling medium used for preparation of the catheter immediately prior to use would be normal tap water.
In order to reduce the risk of infection inherent with the performance of intermittent catherisation of the bladder both the actual swelling medium used and the environment in which the catherisation is performed need, however, to be as clean and antiseptic as possible. Evidently, this need may be very difficult to meet in many daily life situations, as where catherisation must be performed outside the users normal daily environment, e.g. in public toilets, where neither the water supply nor the general state of cleanliness can be expected to be of a sufficiently high standard. Moreover, many disabled users have severe difficulties in entering available toilet rooms du
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Kayer.o slashed.d Helle
N.o slashed.sted Ulrik
Tangh.o slashed.j Allan
Torstensen Jan
Bui Luan K.
Coloplast A/S
Sewell Paul T.
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