RU1821176C - Device for implantation of intravenous filter - Google Patents

Abstract

Usage: in medical technology to prevent pulmonary embolism. SUMMARY OF THE INVENTION: In an intravenous filter implantation device, the locking joint is formed by a knot of thread with three axisymmetrically arranged loops covering the free end of the cable with voltage. 2 ill.

Description

The invention relates to medical equipment, in particular to surgical devices for the prevention of pulmonary embolism.

The aim of the invention is to increase the reliability and ease of use of the device for implanting an intravenous filter by ensuring the rigidity and accuracy of attaching the filter to the implant device and the ease of disconnecting the filter after completion of implantation.

In FIG. 1 shows a device for implanting an intravenous filter with a filter: FIG. 2 is a fragment of the external view of an implantation device and a lock connection in the form of a thread assembly.

The device for implanting an intravenous filter 1 has an outer tube 2, at the end of which a capsule 3 is fixed to accommodate the filter. A cable 4 with a handle 5 for control is located on. a tubular leash b, at the end of which a forming element 7 is placed. A knot 8 of thread is fixed to a tubular leash 6 at the base of the forming element 7, axially symmetrical loops of the node 8

cover the end of cable 4 with voltage.

Preparation of the device for operation is carried out as follows.

Using the handle 5, the cable 4 is recessed into the tubular leash 6 so that the free end of the cable 4 protrudes from the forming element 7. A central hole of the filter 1 is imposed on the protruding end of the cable 4 until it touches the forming element 7. Thread 8 is wrapped two or three times a leash 6 at the base of the forming element 7, then a thread is passed between the legs of the filter 1, a thread is wrapped around the end of the cable 4, forming a loop, and with tension, the thread is returned to the tubular leash 6, wrapping the thread around it. Only three loops arranged axisymmetrically are formed in the same way, after which the thread is finally fixed on the tubular lead 6. As a result, the thread generally forms a knot 8, which securely attaches the filter 1 to the forming element 7 of the tubular lead 6 of the applicator.

What follows is the placement of filter 1 in capsule 3, the input of the device according to general 00 1

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according to the accepted technique, through the right internal vein vein into the vena cava, pushing the filter out of the capsule and clarifying its placement in the vena cava under the control of an x-ray machine.

To release the filter from the applicator, simply use the handle 5 to drown the cable 4 into the tubular leash 6. The loops of the assembly 8 are tilted, turning relative to the conditional axes perpendicular to the axis of the applicator in the place of mounting of the assembly 8 to the tubular lead 6, and as a result no extraneous forces are applied to the filter. The accuracy of filter implantation is improved since immediately before its detachment there was an additional increase in the rigidity and accuracy of fastening the filter to the applicator.

After the filter is installed in the vein with the help of the handle 5, the cable 4 is generally removed from the tubular lead b, and the latter can be used for directed jet delivery of therapeutic agents.

Another advantage of the proposed design is its insensitivity to the thickness of the filter at the place of its attachment to the applicator. This allows the use of an applicator to implant filters of various designs. In particular, the REPTELA filter, having in the center a threaded sleeve, the height of which is significantly greater than the thickness of the filter elements, can be implanted using the proposed device. In this case, the filter is not screwed onto the cable, but simply mounted on its free horses (the diameter of the cable is less than the internal diameter of the thread) and then attached to the forming element. Other manipulations as above are more common.

The advantage of the proposed design is also a strengthening trend

one-time use of the device for implantation of an intravenous filter, since the formation of a locking assembly from a thread for attaching the filter requires a certain skill and is carried out outside the hospital in the manufacture of disposable sets containing sterilized implantation devices with a capsule-packed filter. As a result, the proposed device makes a significant contribution to the overall Anti-AIDS program.

The proposed device for implantation of an intravenous filter has undergone extensive clinical testing with positive results in various clinics of our country and is accepted, as the main one, for serial production at the Chelyabinsk watch factory. Moreover, for

The filter-applicator lock assembly uses a conventional surgical thread. It is also possible to use a thin soft wire.

Formula of the invention

A device for implanting an intravenous filter, comprising an outer tube with a capsule for accommodating an intravenous filter and a cable located inside the outer tube, characterized in that, in order to increase reliability and ease of use, a tubular leash is inserted into it,

on the working end of which there is a forming element for fastening the filter in the form of a spheroidal thickening, the filter with the forming element is connected using a lock connection formed by a knot of thread with three axially symmetric loops spanning the free end of the cable with voltage, while on the other end of the cable fixed control knob in the form of a loop.

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fig 2