Device for selective catheterization

 

(57) Abstract:

The invention relates to neurosurgery, in particular to selective catheterization of the spinal canal and intervertebral holes and local endolyumbalnye pharmacophobia in the treatment of diseases of the nervous system affecting etiology, and can also be used for intravascular manipulations for the dosed administration of medication directly into the lesion. Device for selective catheterization contains nested coaxially to each other with a possibility of free movement along and around the axis relative to each other of the outer conductor, an epidural catheter and the inner conductor. The outer conductor is made hard along the full length of the epidural catheter is made of soft along the entire length, and the inner conductor is made with variable stiffness along the entire length, from the rigid proximal portion to the super soft distal portion, which is located deviation and rotation from 0 to 360orelative to the axis of the inner conductor. The device allows to reduce trauma to the tissue, the volume and the dose of the drugs, as well as eliminate damage to the dural SAC and the roots, to avoid open surgical is in for selective catheterization refers to neurosurgery, in particular, selective catheterization of the spinal canal and intervertebral holes and local endolyumbalnye pharmacophobia in the treatment of diseases of the nervous system affecting etiology, and can also be used for intravascular manipulations for the dosed administration of medication directly into the lesion.

Diseases of the nervous system affecting etiology, in particular sciatica, are in the overall structure of diseases of the peripheral nervous system up to 80%, are associated with prolonged disability and often lead to disability. The development of tools to manipulate and be manipulated in the spinal canal without damage to the neurovascular structures remain important. The tools available are not sufficiently effective and versatile and have their positive and negative sides.

Know the course epidural analgesia by repeated punctures of the lower sacral foramen and the introduction of large amounts of drugs through a needle and syringe (B. K. Romanov, Treatment of radiculitis epidural injection of medicinal substances, Leningrad, MEDICINE, 1971, S. 49-5).

The closest technical solution to the claimed is the catheterization device according to the patent of the Russian Federation 2074010 MKI 6 A 61 M 25/08, publ. 27.02.97 bull. N 6, which contains the catheter and placed in it the inner conductor, representing a Flex NIB, two disks - one for the distal portion, the other at the proximal part, connected by several wires, which allows the manipulation of the wires at the proximal section of the inner prevodchiku to provide deviation managed the distal section of the catheter 360oaround the axis of the tool to advance the catheter through curved sections of vessels and branches.

The objective of the proposed technical solution is the creation of a device for selective catheterization at the location of the area of the lesion in the spinal canal and intervertebral holes, which avoids damage to the dural SAC at the puncture and catheterization, to avoid accidental introduction of medical products under the Dura and General toxic effect drug PR is subjective catheterization contains nested coaxially to each other with a possibility of free movement along and around the axis relative to each other of the outer conductor, the epidural catheter and the inner conductor. The outer conductor is made hard along the full length of the epidural catheter is made of soft along the entire length, and the inner conductor is made with variable stiffness along the entire length, from the rigid proximal portion to the super soft distal portion, which is located deviation and rotation from 0 to 360orelative to the axis of the inner conductor.

Running hard outer conductor along the entire length allows it to be transported through the lower sacral hole to the spinal canal soft epidural catheter with the inner conductor, the Use of the walls of the spinal canal as a continuation of the rigid outer conductor to move soft epidural catheter, with nested inside inner conductor, with extra soft distal part, gives you the ability to move the catheter to the level of any of the affected segment of the spine without damaging the fabric too. The execution of the inner conductor with variable stiffness along the entire length, from the rigid proximal portion to the super soft distal portion, allows the super soft distal to ask any lateral and axial deviation from 0 to 360oin accordance with the real part of the inner conductor with the catheter directly to the affected area, for example located in the intervertebral foramen.

The set of features is new and allows to reduce tissue injury that is caused by only one puncture of the spinal canal, to reduce the volume and the dose of the drugs, thereby avoiding General toxic effect of drugs, eliminate damage to the dural SAC and roots, in many cases, to avoid open surgery, to reduce the treatment time, improve the patient's quality of life.

The technical solution is illustrated by drawings, where Fig. 1 shows the device Assembly of Fig.2 - outer conductor of Fig.3 - epidural catheter of Fig.4 - inner conductor of Fig.5 - placement of the device at the location of the zone of the lesion in the spinal canal, Fig.6 - placing the device at the location of the affected area in the intervertebral foramen.

The proposed device, Fig.1, contains nested coaxially to each other so that they can move along and around the axis relative to each other external hard over the length of the conductor 1, soft over the length of the epidural catheter 2, located in the inner conductor 3 with variable stiffness, from hard praxiology zone of the lesion in the spinal canal, the device is inserted through the lower sacral hole with his hard outer conductor 1 into the spinal canal and, using the wall of the spinal canal as a continuation of the external hard Explorer to move along its axis soft epidural catheter 2 with nested inside the inner conductor 3 with extra soft distal part C, to the lesion.

In the presence of a lesion in the intervertebral foramen in the device produces a preliminary rejection of the super soft part of the inner conductor C, the corresponding pre-identified location of the affected area returns to its original position, place the catheter 2, together with the catheter placed in a rigid outer conductor 1. Further, the device operates as described above. Upon reaching the affected area rigid proximal portion of the inner guide catheter is moved around the axis relative to the outer conductor, until the distal portion of the inner conductor will lose support on the wall of the spinal canal and take the previously specified deviation from 0 to 360ocorresponding to the location of the affected area in the intervertebral foramen.

1. Device for selective catheterization containing nested coaxially to each other with a possibility of free movement along and around the axis relative who Robotnik made hard along the entire length, an epidural catheter is made of soft along the entire length, and the inner conductor is made with variable stiffness along the entire length, from the rigid proximal portion to the super soft distal part.

2. The device under item 1, characterized in that the super soft distal portion of the inner conductor is located deviation and rotation from 0 to 360orelative to the axis of the inner conductor.

 

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