Surgery – Means and methods for collecting body fluids or waste material
Patent
1998-07-23
2000-05-09
McDermott, Corrine
Surgery
Means and methods for collecting body fluids or waste material
604327, 600573, A61M 100
Patent
active
060597615
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a simple automatic opening and closing type of urination apparatus which is easily connected between a catheter and a urine-collecting bag and which encourages automatically urination and urine-storage of a urinary bladder of a patient who carries out urination by inserting the catheter into the urinary bladder.
BACKGROUND OF THE INVENTION
It is necessary for a patient, who is imperfect or disable in urination, to discharge urine out of the body through a urethra catheter left in the urinary bladder. To this end, several kinds of urination apparatus have been utilized. Most of conventional urination apparatuses introduce urine into the urine-collecting bag through a urethra catheter inserted through the ureter into the urinary bladder and an on-off valve connected to an end of the urethra catheter. In such a urination apparatus, since the urine always flows out of the body through the catheter left in the urinary bladder, the bladder does not effect expansion and contraction to accomplish natural urine-storage and urination and thus remains in an atrophied state. Consequently, the urinary bladder may lose its function after a long period of time.
Thus, several automatic urination apparatuses which actuate an on-off valve in response to detection of a urine pressure in the urinary bladder have been proposed to maintain the function of the urinary bladder. However, these apparatuses have several problems in that they are large in scale, expensive, and inconvenient for a patient.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a simple automatic opening and closing type of urination apparatus which enables a patient to collect urine while maintaining a normal function of a urinary bladder and is inexpensive and simple in construction.
A simple automatic opening and closing type of urination apparatus in accordance with the present invention, comprises a cylinder, a pressure responsive plunger, a resilient member, a protective casing, and a lock mechanism.
The cylinder is provided in a front end with an inlet port, on a rear end with a cylinder flange, and in an outer peripheral wall of an intermediate portion with a plurality of outlet ports. The pressure responsive plunger is slidably received in the cylinder and provided on a front end with a liquid-sealing portion, on a rear end with a plunger flange, and on an intermediate portion with a plurality of ribs which extend longitudinally and cross each other radially. At least one of the ribs is provided with serrated teeth which are aligned at a given pitch in a longitudinal direction. The resilient member interconnects the cylinder flange on the rear end of the cylinder and the plunger flange on the rear end of the plunger to attract the ends to each other. The protective casing is secured to the rear end of the cylinder for permitting the pressure responsive plunger to move in an axial direction. The lock mechanism engages with and disengages from the serrated teeth of the rib of the plunger to retain and release the axial movement of the plunger.
The urine in a urinary bladder is discharged from one of the outlet ports in the cylinder into a urine-collecting bag outside a patient's body when a pressure of urine in the urinary bladder reaches one of predetermined values. Each of the outlet ports is set to correspond to each of the predetermined values of the pressure of urine in the urinary bladder communicated with the inlet port of the cylinder. After completing urination, the above operation is repeated. Thus, the uninary bladder can expand and contract for urine-storage and urination as usual, although the uninary bladder is communicated with the urine-collecting bag through the catheter.
Also, in the urination apparatus of the present invention, preferably, three outlet ports are provided in the cylinder in an axial direction to select one of low, middle, and high pressures of urine in the urinary bladder.
Although it is necessary to provide a plurality of ribs on the pressure r
REFERENCES:
patent: 5437652 (1995-08-01), Anatolievich
patent: 5776077 (1998-07-01), Kottig
patent: 5797855 (1998-08-01), Hazard et al.
Nakajima Yasuhiko
Tsukada Osamu
Cho David J.
McDermott Corrine
Tsukada Medical Research Co., Ltd.
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