RU2078588C1 - Multipurpose apparatus for selective remote-controlled catheterization of blood vessels - Google Patents

Abstract

FIELD: medicine, vascular surgery. SUBSTANCE: proposed apparatus for selective catheterization of blood vessels comprises internal and external catheters, flexible guide member and resiliently bent positioner having mace-shaped bulge at its controllable end. Resiliently bent positioner is articulately coupled to flexible guide member, while it is coupled to inner catheter by means of screw pair. Screw of this pair is interposed between positioner and flexible guide member, while internal catheter carries guideway acting as nut. To prevent penetration of blood into internal catheter and to avoid thrombus formation, axial end of internal catheter is provided with manipulator and is sealed with packing member, while catheter portion enclosed by connector secured to non-working end of external catheter has slit-like opening communicating with connector cavity. Latter also has second duct through which it can be filled with washing solution. EFFECT: enhanced versatility during catheterization, handiness to manipulate. 2 cl, 4 dwg

Description

 The invention relates to medicine, and more particularly to vascular surgery.

 Known from / 1 /, the coaxial infusion set consists of a flexible conductor in the form of a spring and a positioner in the form of a metal string placed in an infusion catheter having an adapter with a lateral inlet, as well as a selective catheter. In addition, a manipulator (Cook handle) is included in the kit.

 However, the controlled end of the conductor acquires its curvature after partial extension, and then, if necessary, return to the place; in practice, the retraction process is difficult due to the viscosity of the blood, which makes it difficult to hold a catheter through it.

 The objective of the invention is to increase the selectivity of vascular catheterization, the penetration of the conductor into vessels of the II-III-IV order, the prevention of thrombosis due to the replacement of catheters and conductors with the constant introduction of a washing solution even if there is a conductor in the device, reducing the examination time by using only one conductor and catheter , without replacing them in the course of the study, the possibility of combining reciprocating and rotational motion with a controlled end of the conductor, the possibility of the use of the device, the prevention of unwanted spasms of blood vessels during manipulation of the device, as well as the use of the device using remote control, protecting the doctor from R-radiation.

 In FIG. 1 is a general view of the device, in FIG. 2 the working end of the device, in FIG. 3 the central portion of the device, in FIG. 4 non-working end of the device.

 A device for selective catheterization of blood vessels contains an outer 1 and an inner 2 rods, a flexible conductor 3 with a curved positioner 4 at the working end. A guide 5 is fixed in the inner catheter, forming a kinematic pair with screw 6 to ensure rotational and translational movement of the positioner when it leaves the catheter 2. In this case, the screw is connected to the conductor using a hinge 7. A connector 8 with two channels is fixed to the non-working end of the external catheter 1 , one of which 9 is designed to supply flushing fluid, and the other, equipped with a seal 10, to accommodate the internal catheter 2. In this case, the portion of the internal catheter installed in the connector 8 may be in made of more durable material than its working end. The non-working end of the inner catheter 2 is connected to the manipulator 11, spring-loaded relative to the connector 8. Similarly, the spring-loaded manipulator 12 is attached to the non-working end of the flexible conductor 12. To prevent blood from entering the cavity of the inner catheter 2, its end is sealed with a seal 13, and at its portion located in the connector 8 , made a slot hole 14 for communication with the cavity of the connector, which is filled with a washing solution.

 The operation of the device is as follows.

 After puncture of the main vessel, a conductor is inserted through it with a needle, the needle is removed, and a dilator-introducer is introduced through the conductor. After removal of the introducer through the conductor, a catheter 1 with a connector 8 is inserted into the vessel. Then, the remaining part of the device is introduced through the connector 8 and through the catheter 1, and it acquires the general view shown in FIG. 1. Using seals 13 and 10, as well as connecting a dispenser with a washing solution through channel 9, the device is sealed. A constant supply of a washing solution, which removes blood from the device, begins in the vascular bed. The washing solution enters the catheter 25 through the slot 14. When the manipulator 11 is pressed, the spring is compressed and the working end of the catheter 2 is withdrawn from the catheter 1. When the manipulator 12 is pressed, a curved positioner 4 is withdrawn from the catheter 2 (Fig. 5), which simultaneously with the translational rotates in a circle due to the presence of a screw pair. The translational movement of the catheter 2 and the translational-rotational movement of the positioner 4 are independent of each other and can be performed both simultaneously and separately, which distinguishes this process of catheterization of the vessel.

 Example. Patient BF, 49 years old, medical history N 1871, was examined in the neurosurgical department of the Adygea region of the hospital for a purulent process in the head area. To this end, selective angiography was performed on 2.02.91 using the proposed device in a manual version. After puncture of the right femoral artery with a needle, a conductor is inserted through it through the control of the television screen into the aortic arch. The needle was removed, the hole in the vessel was dilated by the dilator-introducer, and after its removal, a catheter 1 with connector 8 was brought to the aortic arch along the conductor. Then, the conductor was removed, and the lagged part of the device was inserted through connector 8 and catheter 1. Using seals 10 and 13 and when connecting the dispenser to channel 9, the device is sealed. Using a dispenser, a washing solution at a rate of 5 ml / min began to be supplied into the vascular system of the patient. By operating the manipulators 11 and 12 under the television screen, the catheter 2 is easily guided into the right external carotid artery. The maxillary artery was ascertained. The study went without complications. A catheter 1 with an outer diameter of 8 on the Charrier scale was used.

Claims (2)

 1. A universal device for selective catheterization of blood vessels, containing external and internal catheters, a flexible conductor, connector and manipulator, characterized in that the flexible conductor is equipped with an elastic curved positioner connected to the internal catheter using a helical kinematic pair, the screw of which at one end is rigidly connected to positioner, and another pivotally with a flexible conductor, while a guide is used as a nut, rigidly fixed in the internal catheter.  2. The device according to claim 1, characterized in that at the end of the internal catheter from the side of the manipulator a seal is installed to seal its internal channel communicating through a slot with a connector cavity in which a washing solution can be placed.

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