Urethral catheter and guide

Abstract

An indwelling catheter for insertion into a patient's urinary tract is provided that includes first and second tubular members that enable drainage of physiological fluids. An inflatable balloon is attached to the second tubular member. The first and second tubular members are interconnected by a connecting tube forming a gap between the first and second tubular members. The connecting tube is in fluid communication with the balloon to enable the balloon to be inflated via the connecting tube. When the balloon is anchored within the urinary bladder the second tubular member is located within the prostatic urethra with one end in close proximity to the sphincter and the other end protruding into the urinary bladder. The first tubular member is located within the penile urethra with one end in close proximity to the sphincter so that the connecting tube traverses the sphincter permitting voluntary control of the sphincter.

Description

[0001] This is a continuation-in-part of U.S. patent application Ser. No. 09 / 018,664, filed Feb. 4, 1998, the specification of which is hereby incorporated by reference.FIELD AND BACKGROUND OF THE INVENTION [0002] The present invention relates to an internal catheter for insertion into the urethra of a patient and to a catheter guide for effecting such insertion, More particularly, the present invention relates to an indwelling catheter specifically adapted for treating obstruction of the prostatic urethra and to a catheter guide, for flushing the patient's urinary tract and for the insertion and positioning of the catheter therewithin. The invention further relates to a method of inserting and positioning an indwelling catheter in the urinary tract of a patient using the guide of the present invention. [0003] Benign prostate hyperplasia (BPH) is a condition wherein enlargement of the prostate gland constricts and blocks the portion of the urethra traversing the prostate (i.e., the ...

AI Technical Summary

Benefits of technology

[0017] According to one aspect of the invention described below, there is provided an indwelling catheter for insertion into a patient's urinary tract, the tract including a urinary bladder, a prostatic urethra, a sphincter and a penile urethra, the indwelling catheter comprising (a) a first tubular member having a distal end and a proximal end; (b) a second tubular member having length, a distal end and a proximal end, the first and second tubular members having such a diameter for enabling drainage of physiological fluids therethrough; (c) a first inflatable balloon being inflatably attached at a portion of the second tubular member; and (d) a first connecting tube of substantially smaller diameter interconnecting the first and second tubular members to form a gap of a known maximal length between the first and second tubular members, the first connecting tube being in fluid communication with the first inflatable balloon, so as to enable inflating the first inflatable balloon via the first connecting tube; wherein the length of the second tubular member, the known maximal length of the gap and a location of the portion of the second tubular member to which the first inflatable balloon is inflatably attached are selected such that, when positioned in the urinary tract, the balloon is anchored within the urinary bladder, so as to position the second tubular member within the prostatic urethra with its proximal end positioned distally, and in close proximity, to the sphincter, and with its distal end protruding into the urinary bladder, and further so as to position the first tubular member within the penile urethra with its distal end positioned proximally, and close proximity, to the sphincter, while the first connecting tube traverses the sphincter, thereby permitting voluntary control of the sphincter.

[0041] Further according to an embodiment of the present invention, there is provided an indwelling catheter for insertion into a patient's urinary tract, the tract including a urinary bladder, a prostatic urethra, a sphincter and a penile urethra, the indwelling catheter comprising (a) a first tubular member having a distal end and a proximal end; (b) a second tubular member having a length, a distal end and a proximal end, the first and second tubular members having such a diameter for enabling drainage of physiological fluids therethrough; (c) a first inflatable balloon inflatable connected to a portion of the second tubular member; and (d) a first connecting tube of substantially smaller diameter interconnecting the first and second tubular members to form a gap of a known maximal length between the first and second tubular members, the first connecting tube being in fluid communication with the first inflatable balloon, so as to enable inflating the first inflatable balloon via the first connecting tube, wherein the length of the second tubular member, the known maximal length of the gap and a location of the portion of the second tubular member to which the first inflatable balloon is inflatably attached are selected such that, when positioned in the urinary tract, the balloon engages the prostatic urethra and the second tubular member has its proximal end positioned distally, and in close proximity, to the sphincter, and its distal end protruding into the urinary bladder, whereas the first tubular member engages the penile urethra having its distal end positioned proximally, and is in close proximity, to the sphincter, while the first connecting tube traverses the sphincter, thereby permitting voluntary control of the sphincter.

[0043] The present invention successfully addresses the shortcomings of the presently known configurations by providing a catheter and guide system with simple means for accurately positioning and securely anchoring the catheter within a patient's urinary tract, such that voluntary biological control of urination is maintained. Furthermore, the catheter of the present invention can also be used to both ablate and dilate a patients prostatic urethra, while at the same time allowing the urination of the patient.

Problems solved by technology

Benign prostate hyperplasia (BPH) is a condition wherein enlargement of the prostate gland constricts and blocks the portion of the urethra traversing the prostate (i.e., the prostatic urethra) and leads to difficulties in normal urination.

Following a thermal ablation procedure, temporary blockage of the prostatic urethra is usually experienced due to extensive swelling and edema formation.

Such catheters, beside being highly uncomfortable, suffer from two major limitations.

First, such catheters do not allow voluntary urination.

Second, upon prolonged installation, they frequently cause urinary tract infections.

For example, some catheters are constructed such that they traverse the sphincter region of the urethra, not allowing for sphincter closure and thus necessitating the use of a valved line for urination control.

These catheters are further limited in such that the urination line which leads from the bladder to the outside environment is often the cause of urinary tract infections, which necessitate the removal of the catheter, followed by antibiotic treatment and repositioning of a new catheter, causing great discomfort to the patient.

Additionally, positioning of a catheter via a sphincter balloon can often be difficult and time consuming, whereas positioning of a catheter via bladder balloon often necessitates a more complex guide and catheter system.

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