Guide medical catheter

 

(57) Abstract:

The invention relates to medical engineering, in particular to tools for pattersonii blood vessels and hollow organs. The invention consists in the possibility to control the elasticity and quality Explorer settings by executing the work item Explorer in the form of a two-layer elastic pre-directional multi-section element connected with the mechanism of its control, made ratchet or collet. 8 C.p. f-crystals, 4 Il.

The invention relates to medical equipment and, in particular, can be used as a tool during catheterization of blood vessels and hollow organs.

Famous Explorer of the medical catheter, containing elastic metal core on which is wound the spring, and the ribbon that connects the distal and proximal ends of the conductor [1]

Famous Explorer has the following disadvantages:

limited maneuverability;

a significant gap during the rotation of the conductor;

at small bending radii Explorer easily deformed;

has a low limit of elasticity;

significant differences in each instance is isoi diameter, what complicates its use in thin-walled vessels and vessels of small diameter.

The objective of the invention is to increase the effectiveness of the guide by making it possible to control its elasticity and quality parameters due to their standardization.

This is provided by the fact that the famous Explorer that contains the work item with olive at the distal end, we offer a work item to be performed in a two-layer elastic prestressed element connected to the control mechanism, dual layer elastic prestressed element to perform in the form of coaxial, one-sided coiled, external and internal spring, the distal ends of which are connected with olive having a through longitudinal channel, and the proximal ends of the springs are connected each with its shank, the inner through channel of the first shaft with the second shaft, the outer spring with the first shank, the shank in contact with each other subcommi end surfaces, the outer end of the second shank has an element locking connection, and Oliva are connected with rigid tape the first shank. Provides a mechanism for the control conductor will the Oia efforts platoon springs, and having on its outer side element locking connection, and on its lateral surface fitting, connected to the internal channel of the guide, additional, incremental section of the conductor has a two-layer elastic, pre-stressed element made in the form of coaxial, one-sided coiled, external and internal spring, the distal ends of which are connected with a tip having a through longitudinal channel, and on its side element locking connection. The proximal ends of the springs are connected each with its shank, the inner spring through channel of the first shank is connected to the second shank, and the outer spring with the first shank which are in contact with each other subcommi end surfaces, the outer end of the second shank has an element of interlock. Features external and internal spring conductor to perform pre-twisting tension in different directions, the elements of the tool joints to perform as typical mating with each other elements connection type dovetail, ratchet mechanism to perform in the form of a ratchet wheel and in contact with it spring pawl having a fault trigger.

In Fig. 1 shows a first design, the initial section of the conductor of Fig. 2 construction of the additional attached section of the conductor of Fig. 3 mechanism design management guide using the ratcheting mechanism of Fig. 4 section A-A contact Zubovich surfaces of the shanks of the inner and outer springs in Fig. 1.

Guide medical catheter consists of several sections, each of which contains a coaxial inner 1 and outer 2 springs at the distal end of the first, primary partition Explorer installed Oliva 3, the inner groove 4 which includes the distal end of the internal spring (Fig. 1). At the proximal end of each section there are the shanks 5, 6, United, respectively, with the inner 1 and outer 2 springs. Shanks 5, 6 are in contact with each other with their end subcommi 7 surfaces. The spring 1 is connected with its shaft 5 to pass through the longitudinal channel 8 of the first shank 6. At the end of the second shank 5 has a locking element soedinenii axis passes through channel 8. Through the longitudinal channel 10 has the olive 3, which is connected to the first shank 6 hard tape 11.

Additional, the joining section 12 of the conductor (Fig. 2) basically repeats the initial design stage. At the distal end of the additional section 12 has a tip 13, which is made through the longitudinal channel 10, and the outer part of the end face of the tip 13 has an element of interlock 14 (in this example, the element connection type "swallow's tail"). Tip 13, as well as olive 3 has an internal groove 4 for internal spring 1.

All sections have a hard connective tape 11 between the tip 13 additional sections 12, Oliva 3 primary, the first section and the first shank 6.

The last section of the conductor is connected to the control mechanism 15 by a conductor consisting of a contact part 16 with the response, the locking element 17 of the connection (in this case, the projection-type "swallow's tail"). Locking part 16 of the control mechanism 15 through the inner sleeve 18, passing through the body 19, is connected with the ratchet wheel 20, on which is mounted a knob twist 21 springs 1, 2. Ratchet wheel 20 is in contact with the spring-loaded pawl 22 with fault trigger 23. In the second part 16 (Fig. 3).

A second embodiment of the control mechanism Explorer are two collet coupling 26 having internal longitudinal through channel 27, which includes the shank. 5,6.

With the guide are as follows.

The conductor is assembled from as many sections as necessary, based on the total length of the path of the conductor in the direction of the blood channel.

In the first stage operation is carried out by pre-twisting of the springs 1, 2 in each section of the conductor in order to create the required modulus of elasticity in each section separately and only Explorer in General. For this purpose, the control mechanism 15 by a conductor on the basis of the ratchet mechanism 20, or on the basis of the collet spring clutch 26.

Consider using ratcheting mechanism 20.

The control mechanism 15 is connected with the butt-end of the last section of the conductor by joint elements of interlock 9, 17. Then, successively severing subzone the ends 7 of the shank 5, 6 in each section turn the handle of the cocking spring 21 at the angle required for the elasticity of each section and the whole of the conductor and their equality in each section. Then shanks 5, 6 and let unicostata, thus, the desired pre-stress state of the sections and the conductor as a whole.

If using a collet sleeves 26, they put each on its shank 5, 6 and then disconnecting them produces different sides of the rotation on the angle that you want for this activity, or research, re-connect the shanks to each other. Thus, a pre-stressed state is achieved and ensured standardization of the parameters of the springs in tension, due to the different characteristics of the metal used for the manufacture of springs 1, 2. In conclusion collet clutch 25 is removed.

The guidewire is inserted into the vessel by a standard method of Selinger and shall conduct him across the channel of the blood vessel.

At a meeting of the conductor with the bend of the vessel handle 21 of the ratchet wheel 20 rotates the contact part 16 of the control mechanism 15 and with it the springs 1, 2 at a certain angle, reserving, however, in the spring some potential energy. The amount of twist can be controlled, and at the hearing, the number of clicks dogs 22 ratchet wheel 20. Then click on the fault trigger 23 of the pawl 22 is released the springs 1, 2, which are liberated to create the e promotion of the conductor along the vessel, can create different compressive stresses on the parts of the vessel a variety of sinuosity.

The initial tension of the inner and outer springs 1, 2 provides, in addition, the tightness of the inner channel only conduit through which the working area can be different fluid (contrast, medication) or to be sucking from the work area. Connection of internal channels 8, 10, 24 in the conduit through the nozzle 25 of the control mechanism 15 conductor.

1. The conductor of the medical catheter, containing the work item with the olive tree at its distal end, wherein the working element is designed as a two layer elastic prestressed element connected to the control mechanism.

2. The guide p. 1, characterized in that the DL prestressed elastic element is designed in the form of coaxial, one-sided coiled outer and inner springs, the distal ends of which are connected with olive having a through longitudinal channel, while the proximal end of the internal spring is connected through channel of the first shaft with the second shaft having a locking element connections, and PR the key is made with subcommi end surfaces, in contact with each other.

3. The guide p. 1, characterized in that the control mechanism conductor is made in the form of a housing with a contact part connected to the ratchet and handle regulatory efforts platoon springs and having on its outer side element locking connection, and on its lateral surface fitting, connected to the internal channel of the conductor.

4. The guide p. 1, characterized in that it additionally has the expandable section of the conductor, made in the form of a two layer elastic prestressed element consisting of a coaxially-sided coiled outer and inner springs, the distal ends of which are connected with a tip having a through longitudinal channel, and on its side element locking connection, while the proximal ends of the inner springs are connected through channel of the first shaft with the second shaft, the outer end of which has a scarf joint, and the proximal end of the outer spring with the first shank, and the shank is made with subcommi end surfaces which are in contact with each other.

5. The guide p. 2, characterized in that the inner and outer springs is to under item 2, characterized in that the locking elements of the connections made in the form of typical mating with each other elements connection type "dovetail".

7. The guide p. 3, characterized in that the ratchet mechanism is in the form of a ratchet wheel and in contact with it spring pawl having a fault trigger.

8. The guide p. 1, characterized in that the control mechanism conductor is made in the form of a spring-loaded push-in couplings, end-to-end channels which include shanks.

9. The conductor on p. 4, characterized in that the additional incremental section of the conductor has a rigid strap connecting the tip with the first shank.

 

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