JPH11510725A - Improved double track catheter for irrigation, aspiration and intracranial pressure monitoring and control - Google Patents

Abstract

(57) [Summary] An improvement of the double track catheter for cleaning, suction and monitoring and controlling intracranial pressure of the present invention is to form an elongated single-piece hollow body (1) from a substantially flexible material. The body has three independent longitudinally extending conduits, the first of which constitutes an intermediate guide conduit (2), the other two of which are arranged on both sides, And the other as a discharge line (4), the above-mentioned three lines are integrally formed to form the hollow body (1), and the ends of all the lines are closed. A plurality of small holes are arranged in (3, 4), and a group of passages (3) communicating with the outside of the catheter and the injection passage (3) and the discharge passage (4) formed in the hollow body (1), respectively. , 4 '), an external stopper (5) is provided in the hollow body, and a connecting portion (6) is provided at one end. In the section, the guide line (2) is provided so that one end thereof is simply exposed and the other two lines (3, 4) are connected to a similar hollow and flexible extension (3 ", 4"). The pipes which are connected and form the two extensions have a completely independent but identical configuration, in particular in that they comprise a valve (7) and a connection (8). Consisting of

Description

DETAILED DESCRIPTION OF THE INVENTION Improved double track catheter for irrigation, aspiration and intracranial pressure monitoring and control   The present invention relates to a double track catheter for cleaning, aspiration and monitoring and controlling intracranial pressure. The need for draining cerebrospinal fluid out of the vertebral column due to pathological conditions Significantly improve and facilitate the care of certain neurological patients and measure and control intracranial pressure The technical and functional improvement of a catheter that enables   Recently, several devices commonly referred to as "external ventricular suction devices" are known to those skilled in the art. ing. It basically consists of a simple single tube, one end of which is Is implanted in the cerebral ventricle, and the other end outside the skull is aspirated through a catheter. Connected to a container suitable for collecting the liquid. With today's external ventricular aspirator, Make sure that mechanical and / or electronic sensors are connected (or disconnected). This sensor can measure intracranial pressure continuously or at regular intervals. Wear. In existing devices, the pressure of the fluid in the ventricle and the pressure due to gravity are reduced. Due to the gravitational effects that create a force difference, the fluid in the ventricle is drained, and It is directly affected by the height at which the collection container is located. The height that matters is the height of the cerebral cavity This is the difference between the lower height of the container and the height. In these situations, the problematic liquid flow Is determined by Poiseuille's law, flow rate = pressure difference x constant (viscosity of discharged liquid And the diameter and length of the tube used).   As described above, the intraventricular fluid is drained by the pressure gradient, and the draining rate of the fluid is the pressure Reduce the difference, ie change the height of the head or the head It can only be controlled by changing the height of the collection container relative to the part.   Instructions for use of the external drainage device include obstruction by drainage, infection, and intracerebral hemorrhage. It describes a serious situation at risk of intracranial hypertension. Normal of spinal fluid It is known that the amount generated is about 0.4 ml / min, but when the intracranial pressure is high, Produces physiologically half the volume, 0.2 ml / min. This physiological protection The mechanism further reduces the amount of liquid that can be drained by today's drainage devices, The time required to stabilize a hazardous situation becomes longer, resulting in Miscellaneous problems increase.   Due to the above-mentioned disadvantages and to solve them, the cleaning, suction and cleaning of the present invention. Improvements have been made to double track catheters for pulling and intracranial pressure monitoring and control. This This is because, after a double-track catheter has been inserted into the ventricle, the conventional device has one Two external catheters, but two external catheters are placed outside the skull There is a feature in the point. One of the two external catheters is connected to a normal collection container and Electronic and / or mechanical devices for measuring intracranial pressure and / or controlling flow Connected to the instrument, the other catheter is connected to a sterile container, which is preferably sealed And the container is pressured by gravity or mechanical / electronic pump. An appropriate liquid can be injected into the ventricular cavity. Thus, continuous or concise It is possible to wash the ventricles. In other words, a container containing a physiologically appropriate liquid The pressure required for the connected catheter to be inserted into the ventricle and begin to flow fluid When the gradient is too high, the fluid in the ventricle mixes with The product is prevented from increasing. According to this device, it is easier to clean the tissue of the intraventricular tissue. It can be done by the method. This device can also be connected to an injection and suction device, So head Control of the pressure in the lid is facilitated.   The double track catheter for cleaning, suction and intracranial pressure monitoring and control of the present invention is It is new. Does everything that can be done with existing equipment And is capable of draining and cleaning the ventricular tissue and controlling intracranial pressure Because they can be controlled at the same time. Therefore, according to the present invention, there is no problem. A double traverse catheter allows the injection of an appropriate fluid into the ventricle while draining. There is a feature in the lock structure.   For a better understanding of the present invention, it will be described in detail below with reference to the accompanying drawings. However, in the attached drawings,   FIG. 1 is a perspective view showing the exterior of the catheter in question in detail;   FIGS. 2, 3, and 4 are enlarged sectional views of the double track body.   Figure 5 shows the use of a double track catheter that simultaneously drains and injects sterile liquid. 5 is a schematic view showing a method of use.   Referring to FIGS. 1 to 4, for cleaning, suction, monitoring and internal pressure control according to the present invention. The improvement of the double track catheter is shown as a long single piece, Flexible material hollow body (1) has three longitudinally extending conduits, namely guide tubes With a line (2) and an inlet line (3) and an outlet line (4) provided on its side. Is characterized in that These three conduits form one member forming the hollow body (1). More covered. Although their front ends are closed, the conduits (3, 4) A plurality of small holes are distributed in the radial direction, and these small holes are Injection passage (3) and discharge passage (4) formed in the outside of the teller and hollow body (1) Constitute a group of passages (3 ', 4') communicating with each other. The hollow body has an outside A part stopper (5) is provided, and a connecting part (6) is provided at one end. At the connection, one end of the guide conduit (2) is simply exposed. Although provided, the other two conduits (3, 4) are of a hollow and flexible similar construction. It is connected to the long part (3 ″, 4 ″). The two conduits are completely independent of each other But the same configuration, especially in the provision of valve (7) and connection (8). are doing.   Referring to FIGS. 3 and 4, the central guide line (2) is preferably circular, The pipes (3, 4) on both sides can be changed within a common circular range. Therefore, as shown in FIGS. 3 and 4 as an example, the cross section may be of various shapes. Can be. And the cross section of the hollow body (1) is circular due to the cross-sectional shape of the pipe. Or a somewhat flattened shape. However, their functions are exactly the same, As shown in FIG. 5, two external catheters (3 ″) are inserted into the intraventricular cavity. , 4 ″) are located outside the cranial cavity, one of which (4 ″) is the collection container (C) And / or electronic equipment for intracranial pressure measurement and / or flow control Alternatively, it is connected to a mechanical device (M '). Or connected to these devices You don't have to. The other catheter (3 ″) is preferably a sealed sterile container. Connected to a vessel (E) and the vessel is connected to A suitable liquid can be injected into the ventricular cavity by means of a mechanical / electronic device (M ').   The equipment (M, M ') is connected or unconnected to a suitable computer Separate mechanical / electronic devices that can be used to measure intracranial pressure while maintaining Liquid injection or aspiration can be controlled in relation to the pressure to be held or changed. Wear.   Thus, the brain is continuously or at regular intervals compared to a normal single catheter. Simultaneous drainage from the ventricle, cleaning of the ventricles, and control of intracranial pressure . That is, an external cassette connected to a container (E) storing a physiologically appropriate liquid. Tell (3 ") penetrated into the ventricle Stung. When the pressure gradient required to start the liquid flow is too large, Increased liquid volume in the ventricle due to drain line (4 ") connected to collection container (C) Is prevented. As described above, this method makes it easy to clean tissue in the ventricle. Can be done.

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Claims (1)

[Claims]   1. Improved double track catheter for irrigation, aspiration and intracranial pressure monitoring and control At   Forming an elongated unitary hollow body (1) from a substantially flexible material;   The hollow body is provided with three independent longitudinally extending conduits, of which the first is The conduit constitutes an intermediate guide conduit (2), the other two conduits being arranged on both sides thereof, All of the above three pipes, one on the injection line (3) and the other on the discharge line (4) Forming the hollow body (1) integrally with the road;   The ends of all the pipes are closed, and a plurality of small holes are provided in the pipes (3, 4). And the injection passage (3) and the discharge passage (4) formed in the hollow body (1). ) Are formed as a group of passages (3 ', 4') communicating with each other between the hollow body and an external stopper. (5) and a connecting portion (6) at one end,   At the connection, the guide conduit (2) is provided such that one end thereof is simply exposed. And the other two conduits (3, 4) have similar hollow and flexible extensions (3 ", 4"). )   The pipelines forming the two extensions are completely independent of each other, but have the same configuration and features. And a valve (7) and a connection part (8). Of double-track catheter for irrigation, aspiration and intracranial pressure monitoring and control .   2. The guide pipe provided at the center is circular, and the pipes (3, 4) on both sides are circular. It can vary in shape within a common circular area, and thus exhibit various cross sections. The cleaning, suctioning and intracranial pressure monitoring control according to claim 1, characterized in that: Double track type cassette Tell improvements.   3. After being punctured into the intraventricular cavity, two external catheters (3 ", 4") It is located outside the cranial cavity, one of which (4 ") is connected to the collection container (C). Electronic and / or mechanical equipment for measuring intracranial pressure and / or controlling flow Device (M ') and the other catheter (3 ") is preferably sealed Connected to a sterile container (E) and the container A suitable liquid can be injected into the ventricular cavity by means of electronic / electronic equipment (M ') The double tiger for cleaning, suction and intracranial pressure monitoring and control according to claim 1, characterized in that: Improvement of the lock type catheter.   4. The devices (M, M ') are connected or connected to a suitable computer. It can be a separate mechanical / electronic device that does not measure intracranial pressure. While controlling the injection or aspiration of liquid in relation to the pressure to be maintained or changed The cleaning, suction and head of claim 1, wherein the cleaning, suctioning and heading are performed. Improvement of double track catheter for monitoring and controlling lid pressure.