RU49719U1 - DEVICE FOR ADMINISTRATION OF MEDICAL PRODUCTS IN THE UREETRA - Google Patents

Abstract

The proposed device for introducing medications into the urethra relates to medical equipment. The technical task of its creation is to ensure the possibility of prolonged local injection of drugs into the tissue rehabilitation rehabilitation zone. To this end, a device for delivering medications in the form of tube-like filaments of a semipermeable membrane in the form of turns on a catheter tube placed directly behind the cuff was inserted into a device containing a catheter in the form of an elastic tube with an inflatable cuff (balloon), and one of the ends of each thread is clamped during winding, and the second is placed parallel to the catheter tube and brought out.

Description

The proposed device relates to medical equipment, namely to urology and can be used to conduct wound dialysis directly in the bed of the removed nodes of benign prostatic hyperplasia.

Urethral catheters are known in the form of two-channel elastic tubes with decorated tips equipped with an inflatable cuff, in front of which there is an opening for draining fluid from the bladder. (See, for example, USSR AS No. 799768, M.cl. ³ A61M 25/00, publ. 30.01.81; USSR AS No. 1159580, MKI A61M 25/00, publ. 07/07/85) . Moreover, the design of such devices does not provide for the possibility of introducing into the urethral canal the medications necessary to accelerate tissue repair during the postoperative rehabilitation of the patient.

A device is known for introducing medications into the urethra and bladder containing a catheter, on the working end of which there is an inflatable retention cuff with a pneumatic drive. (See, pr-RF No. 2077894, IPC ⁷ A61M 25/00, 31/00, publ. 04/27/97). Such a device involves the introduction of a medicinal product through the main channel of the elastic tube of the catheter, communicating through an opening in the tip with the cavity of the bladder.

The disadvantage of this device is the one-time (discrete) mode of drug delivery to the irrigation zone of the rehabilitated patient’s tissues through the bladder, which significantly complicates the localization of the drug exposure and leads to a large cost overrun of drugs, and also complicates the prolonged maintenance of the necessary therapeutic concentrations of drugs in the exposure zone. In addition, such a device does not imply the simultaneous performance of two functions:

drug delivery, and forced removal of urine from the patient’s body.

The technical task of the proposed device is extended in time (continuous) local targeted injection of drugs into the rehabilitation zone of postoperative tissue repair with simultaneous removal of urine excreted by the patient.

To solve the problem in the proposed device containing a catheter in the form of an elastic tube with an inflatable cuff, the drug delivery system is made in the form of tube-shaped threads of a semi-permeable membrane placed in the form of turns on the catheter tube directly behind the cuff, with one end of each thread being pinched when winding, and the second is placed parallel to the elastic tube of the catheter to bring out of the patient's body.

The use of the proposed device allows the prevention of complications during surgical interventions on the prostate gland by prolonged administration and maintenance of therapeutically necessary concentrations of drugs (for example, homocorrectors, antimicrobial and anti-inflammatory), directly in the bed of the removed nodes of benign prostatic hyperplasia for the necessary periods.

The attached sketch of figure 1 shows a General view of a device consisting of a catheter 1 with a two-channel flexible tube 2, equipped with a hole in the tip. Each channel of the tube has its own conclusions 3 and 4. In this case, one of the conclusions is designed to connect the cavity of the inflated cuff 5 with a pressure source. Before the cuff 5, filaments of a tube-like semipermeable fiber membrane 6 are wound, providing smooth diffusion of the drug fluid. The free ends 7 of the threads of the tubular membrane 6 extend parallel to the flexible tube 2 of the catheter 1 for connection to a drug supply source.

Semi-permeable membranes used in the form of UPA hollow-permeable fibers produced by NPO Khimvolokno are biologically safe materials (see “Conclusion on the toxicological tests of UPA-brand hollow fibers” dated 12/08/1983, as well as the Guidelines for the use of porous capsules Pharmapaka approved by the Ministry of Health of the BSSR 12.12.1991). Known documentation indicates that the semi-permeable materials UPA produced by the company "Khimvolokno" meet the hygienic requirements for products in contact with the wound surface.

The proposed device is used during the operation as follows: at the end of the catheter 1, directly behind the inflated cuff 5, the threads of the hollow fiber are fixed and wound in tight turns 6 over a section 10-15 mm long. After that, the catheter through the urethra is inserted into the bladder of the operated patient with the cuff 5 inflated through the technical channel with output 4. In this case, the ends 7 of the hollow fiber tube removed through the patient’s urethra serve to inject drugs directly into the desired wound postoperative zone through the walls of the semipermeable tube - membranes in turns 6 on a catheter 1.

Claims (1)

A device for introducing medications into the urethra, containing a urethral catheter in the form of an elastic tube with an inflated cuff and means for delivering these drugs to the medication zone, characterized in that the medication delivery devices are made in the form of tube-shaped filaments of a semipermeable membrane placed in the form of coils on the catheter tube directly behind the cuff, while one end of each of the threads is clamped by a loop when it is wound, and the second is parallel elastic th catheter tube.