CN106175892B - Multi-section retractable flexible puncture needle inner support device - Google Patents

Abstract

A kind of guarantee flexible puncture needle prevents the Multi-section retractable flexible puncture needle inner support device that the flexible puncture needle part not being pierced into tissue bends in piercing process, devise the Multi-section retractable tube-in-tube structure with support small structure, when flexible puncture needle meets obstructions in puncture since the supporting role of the centre bore of sleeve is without bending, to ensure puncture needle being smoothly pierced into and being accurately positioned in piercing process.Its critical component is end to end multiple telescopic sleeve pipes with centre bore support construction, and multi-joint telescoping sleeve pipe centre bore internal in telescopic process provides effective straight support to avoid flexible puncture needle from bending to flexible puncture needle always.

Description

Multi-section retractable flexible puncture needle inner supporter

technical field

The invention relates to a multi-section telescopic flexible puncture needle inner supporter, which belongs to the feeding movement support structure when the flexible puncture needle is inserted in a puncture biopsy, and relates to technical fields such as mechanical design and medicine.

Background technique

The telescopic flexible puncture needle internal supporter is technically designed with multiple coaxial small holes in the multi-section telescopic tube to provide rigid support for the flexible puncture needle.

Accurate feeding and positioning of flexible puncture needles is the key technology to ensure the puncture site in technical fields such as biopsy in clinical medicine. Generally, when the flexible puncture needle encounters a large puncture resistance, the flexible puncture needle that has not entered the tissue will experience instability and bending, resulting in the inability of the flexible puncture needle to be positioned accurately inside the tissue, or even due to excessive Bending prevents further penetration.

At present, there is no effective device for ensuring that the part of the flexible puncture needle that does not penetrate into the tissue does not bend during the puncture process.

Against this background, the present invention provides a multi-section telescopic flexible puncture needle internal support that provides rigid support to the flexible puncture needle during the puncture movement and prevents the flexible puncture needle from bending and deformation, so as to solve the problem of the flexible puncture needle being punctured. The problem of inaccurate positioning of the puncture site caused by instability and bending during the process.

Contents of the invention

The present invention solves its technical problem and adopts the following technical solutions.

In order to solve the problem of bending and deformation of the flexible puncture needle during the puncture movement, a multi-section telescopic sleeve tubular structure with multiple coaxial small hole structures inside is designed. It is mainly composed of the first segment sleeve (1), the first segment sleeve Sleeve support end (2), second sleeve support end (3), second sleeve support end (4), third sleeve support end (5), third sleeve support end (6), fourth segment Sleeve (7), support end of the fourth sleeve (8), support end of the fifth sleeve (9), support end of the fifth sleeve (10), end sleeve (11), support end of the end sleeve ( 12), the end connector (13), the length and quantity of the telescopic joints can be adjusted accordingly according to the length of the flexible needle; it is characterized in that: the inner supporter of the flexible puncture needle is composed of multiple sections from large to small, connected end to end Composed of telescopic sleeves, each section of the sleeve is threadedly connected with the corresponding sleeve support end of its diameter, each section of the sleeve has an internal thread structure, and each section of the sleeve support end has an external thread structure; each section of the sleeve There is a small hole supporting the flexible puncture needle at the center of the support end, and each segment of the sleeve and the support end of each segment of the sleeve are connected by threads to form a telescopic tubular sleeve structure; several small holes inside have coaxial characteristics and play a role. The role of supporting the flexible puncture needle; the first section of the sleeve is provided with a fixed flange seat; the end connector is provided with a fixed flange seat, through which the entire puncture needle inner supporter can be fixed on the moving needle for manipulating the puncture needle. on the sliding table, and ensure that the whole set of flexible puncture needles is always in a straight state, and the number of segments of the sleeve can be increased or decreased according to the length of the flexible puncture needles.

Description of drawings

The present invention provides description accompanying drawing as follows.

Fig. 1 is a schematic diagram of the shape of the inner supporter of the multi-section telescopic flexible puncture needle.

Fig. 2 is a longitudinal section structure diagram of the multi-section telescopic flexible puncture needle inner supporter.

Detailed ways

The present invention is implemented according to the structure shown in accompanying drawing 1 and accompanying drawing 2, and it mainly consists of first joint sleeve (1), first joint sleeve support end (2), second joint sleeve (3), second joint sleeve Sleeve support end (4), third sleeve support end (5), third sleeve support end (6), fourth sleeve support end (7), fourth sleeve support end (8), fifth The sleeve (9), the fifth sleeve support end (10), the end sleeve (11), the end sleeve support end (12), and the end connector (13).

When the multi-section retractable flexible puncture needle inner supporter is used for puncture work, the flexible puncture needle inner supporter is first fixed on the sliding platform through the flange seat of the first segment sleeve, and the sliding platform can be punctured with the flexible puncture needle. The needles do puncture together, the flange seat of the end connector is fixed on the fixed frame close to the punctured place, and then the flexible puncture needle is inserted into each coaxial support small hole inside the support, and the flexible puncture needle penetrates Keep the inner supporter of the cover flexible needle in an elongated state before tissue tissue. When the flexible puncture needle punctures with the sliding platform, the telescopic tube of the supporter can be compressed with the movement and always maintain a straight line, thereby preventing flexible puncture Even when the needle is bent, the coaxial support small hole structure can prevent the flexible puncture needle from buckling and ensure smooth puncture and accurate positioning even when the puncture needle encounters puncture resistance.

Claims (2)

1. Multi-section retractable tubular flexible puncture needle inner support device, it mainly by head section sleeves (1), first section housing supports end (2), Second section sleeve (3), the second section housing supports end (4), third section sleeve (5), third section housing supports end (6), Section of four set Cylinder (7), Section of four housing supports end (8), Section of five sleeve (9), Section of five housing supports end (10), minor details sleeve (11), end Save housing supports end (12), minor details connector (13) composition；It is characterized in that：The flexible puncture needle inner support device is by several from big To small, end to end telescopic sleeve composition, each all its corresponding housing supports end of section sleeve is threaded, covers Shell ring number can be adjusted accordingly according to the length of flexible puncture needle；

There is internal thread structure in each section sleeve, there is external thread structure at each housing supports end of saving；Each section housing supports end circle centre position has The aperture of flexible puncture needle, each sleeve that saves is supported to be threaded to form a telescopic tubulose with each section housing supports end Tube-in-tube structure；Internal several apertures play the role of coaxial nature and play support flexible puncture needle；Head section sleeves, which are equipped with, to be fixed Flange seat；End connectors are equipped with mounting flange seat, can be fixed on entire puncture needle inner support device by the two flange seats On the dynamic slide unit for manipulating puncture needle, and ensure that a whole set of flexible puncture needle is in linear state always.

2. Multi-section retractable tubular flexible puncture needle inner support device according to claim 1, it is characterised in that：Each section sleeve Promising flexible puncture needle penetrates and provides the aperture of rigid support at support end center.