JPH0669494B2 - Insulated catheter with medical window - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents a large amount of cryonecrosis caused by extensive freezing during cryosurgery such as benign prostatic hyperplasia, and further prevents a large amount of bleeding due to detachment of frozen necrotic tissue that occurs thereafter. The present invention relates to an auxiliary device for surgery.

[0002]

2. Description of the Prior Art Conventional surgery for benign prostatic hyperplasia by freezing is performed under general anesthesia, spinal anesthesia, sacral anesthesia, or epidural anesthesia, and cryonecrosis of an adenoma swelling at the outlet of the bladder. It is to be removed.

[0003]

The conventional cryosurgery has the following drawbacks to be solved. That is, (a) A large amount of frozen necrotic tissue is generated by extensive freezing. (B) It is necessary to indwell the urethral catheter to secure the urethra and stop bleeding for the inflammatory swelling that is necessary for this purpose. (C) Massive bleeding occurs due to detachment of frozen necrotic tissue after 1-2 weeks. (D) A large amount of anesthesia is required.

[0004]

FIG. 1 shows a catheter according to the present invention, which is molded with a heat-insulating flexible tube having an inner diameter into which a commercially available cryocooler used for cryosurgery (FIG. 2) can be inserted, so that a wide range of conventional freezing points can be obtained. By using this catheter, a part of the adenoma is ditched to the limit necessary to eliminate residual urine.

[0005]

[Function] Therefore, damage to the internal urethral meatus becomes partial, and simple anesthesia can be combined. For example, since the anesthetic effect of cooling also acts, a suppository or injection of an analgesic as basic anesthesia is performed in advance. It is sufficient to inject the urethra with a demulcent containing a surface anesthetic and to inject local anesthesia in the bladder, thus eliminating the need for major anesthesia.

[0006]

[Example] After local anesthesia for cryosurgery, the adenoma state was confirmed by a bladder test, and the length of the urethra was also measured.
Insert this catheter from the tip of the side window (2) according to this length, hold it in a more accurate position by touching the guide button (3), and expose only the main part and prevent freezing of the extra part To do. Then, a freezer (FIG. 2) is inserted into the catheter (1) to perform surgery. FIG. 4 shows a state (6) in which the present catheter was inserted into a benign prostatic adenoma, and (7) shows a gutter created by an operation performed using the present catheter. It seems to be sufficient in terms of eliminating residual urine, but if it is insufficient, expand this ditch or
You may make a side groove on both sides like (8).

[0007]

The advantage of this operation is that the cryonecrosis (7) or (8) of the benign prostatic adenoma (6) is limited only to the necessary part, and a large amount of bleeding due to detachment of a wide range of frozen necrotic tissue is prevented. You can Furthermore, in addition to the ease of anesthesia, the reduction of damage to the urethral meatus can prevent retrograde ejaculation from the condyle, which is necessary to remove all or most adenomas by conventional surgical methods. It can be eliminated or partially suppressed, and a full sexual life can be maintained.

[Brief description of drawings]

FIG. 1 (a) is a top view of the catheter of the present invention; (b)
Side view; (c) Back view; (d) Cross section

FIG. 2 Commercial cryosurgical instrument

FIG. 3 shows a state in which the catheter according to the present invention is inserted into an affected area.

FIG. 4 (a) is a state of prostatic hypertrophy; (b) is a gutter created on one side by using the catheter according to the present invention;
(C) Gutters made on both sides

[Explanation of symbols]

 (1) is a heat-insulating flexible tube (2) is a side window (3) is a guide button (4) is a direction indicator mark (5) is a frozen part (6) is a benign prostatic adenoma (7) is one side The gutter (8) made on both sides is the gutter (9) made on both sides

Claims (1)

[Claims] 1. A medical aid comprising a heat insulating flexible tube (1) having a side window (2), a position confirming guide button (3) and a direction indicating mark (4).