CN201409938Y - Continuous negative pressure biopsy needle - Google Patents

Abstract

The utility model relates to a continuous negative pressure biopsy needle, including a disposable plastic needle tube, a pintle and an external trocar. The continuous negative pressure biopsy needle is characterized in that a gap with a right triangle end surface is arranged on one lateral edge of the pintle; one end of the disposable plastic needle tube is provided with a lock-up card; the outeredge of the lock-up card is connected with an end surface edge; the inner edge of the lock-up card is embedded with the gap; and the other end of the disposable plastic needle tube is connected with the external trocar which is a hollow core and internally provided with a guide needle core. As the continuous negative pressure biopsy needle is provided with the gap on the lateral edge of the pintleand the lock-up card on the disposable plastic needle tube, and the gap is matched with the lock-up card, the retraction of the pintle can be effectively avoided, thereby achieving the purpose of automatically maintaining the negative pressure in the disposable plastic needle tube. The continuous negative pressure biopsy needle has simple structure, convenient and quick operation, and dual-use ofcutting and absorption, and is especially suitable for cases with liquefaction necrosis in focus.

Description

A kind of continuous negative pressure biopsy needle

Technical field

This utility model relates to and a kind ofly is used for clinical medicine, obtains the device of biopsy from human body, relates in particular to a kind of continuous negative pressure biopsy needle.

Background technology

In clinical medicine for deep internal organs space occupying lesion character such as clear and definite lung, liver, pelvic cavity as early as possible, reduce mistaken diagnosis and need carry out percutaneous coarse needle bioptic biopsy usually, and the quality of puncture sampling specimen directly affects accuracy rate of diagnosis.

At present each hospital adopts the sampling of cutting type biopsy needle more, and this device is because of avoiding intralesional liquefaction and necrosis district folk prescription to the location cutting sampling, runs into to puncture through regular meeting and organizes less or only be the puzzlement of slough, has increased the generation of complication and repeatedly puncture; Also there is part hospital to produce little negative pressure-pumping and replenish and obtain cytologic specimen, but makes puncture accuracy and effect also undesirable because of negative pressure instability, operation effort, feel difference by connecting the free-hand tractive of syringe.

The utility model content

Technical problem to be solved in the utility model provide a kind of convenient and swift, can cut and inhale dual-purpose continuous negative pressure biopsy needle.

For addressing the above problem, a kind of continuous negative pressure biopsy needle described in the utility model comprises disposable plastic needle tubing, pintle and outer casing needle, it is characterized in that: an incline of described pintle is provided with the rectangular leg-of-mutton breach of end face; One end of described disposable plastic needle tubing is provided with a locking card, and this locking card outer rim links to each other with end face edge, inner edge and the embedding mutually of described breach; The other end of described disposable plastic needle tubing links to each other with described outer casing needle, and this outer casing needle is a hollow, and built-in guiding nook closing member.

Described breach is one or two.

Described outer casing needle and described guiding nook closing member are complementary.

Described outer casing needle is unimodal monocline face, and the surface is provided with scale.

This utility model compared with prior art has the following advantages:

1, is being provided with breach on the incline of pintle, on the disposable plastic needle tubing, is being provided with the locking card owing to this utility model, and this breach and locking card are complementary, therefore can stop the pintle retraction effectively, thereby reach the purpose of keeping negative pressure in the disposable plastic needle tubing automatically; Concentrate one's energy in the time of can making simultaneously the operator hold the pin operation with singlehanded writing posture.

2, because the outer casing needle in this utility model has the guiding nook closing member that is complementary, do not need to hold up needle device when therefore guiding is located, and can avoid puncture needle to stop up; Can select the external diameter and the length of pin simultaneously according to lesions position, size cases.

3, because the outer casing needle in this utility model is unimodal monocline face, bigger because of its cross section, can in pathological changes, carry fast and insert cutting, and can obtain more rich piece of tissue and Cell sap by the continuous negative pressure in the disposable plastic needle tubing; Also need not avoid the liquefaction and necrosis kitchen range when taking a sample simultaneously, wound is little.

4, this utility model is simple in structure, convenient to operation, can cut to inhale dual-purposely, is particularly suitable for the case that intralesional has liquefaction and necrosis.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 a is the enlarged drawing of locking card in this utility model.

Fig. 2 b is the structural representation of guiding nook closing member in this utility model.

Fig. 2 c is the structural representation of outer casing needle in this utility model.

Among the figure: 1-disposable plastic needle tubing 2-pintle 3-outer casing needle 4-breach 5-locking card 6-guides nook closing member

The specific embodiment

A kind of continuous negative pressure biopsy needle (referring to Fig. 1) comprises disposable plastic needle tubing 1, pintle 2 and the outer casing needle 3 of 10ml or 20ml.

One incline of pintle 2 is provided with the rectangular leg-of-mutton breach 4 of end face.Breach 4 can be one or two.

One end of disposable plastic needle tubing 1 is provided with a locking card 5, and these locking card 5 outer rims link to each other with end face edge, inner edge and breach 4 embedding mutually; The other end of disposable plastic needle tubing 1 links to each other with outer casing needle 3, and this outer casing needle 3 is provided with scale (scale of every 1cm) for hollow, unimodal monocline face, general connection, surface, and built-in three peaks guiding nook closing member 6 (referring to Fig. 2 a, Fig. 2 b, Fig. 2 c).

Outer casing needle 3 has external diameter (16G, 18G, 20G) and length different sizes such as (110cm, 150cm, 170cm), and is complementary with guiding nook closing member 6.

During puncture, with outer casing needle 3, guiding nook closing member 6 channeling conducts location, after entering diseased region, extract guiding nook closing member 6, fast outer casing needle 3 is connected with disposable plastic needle tubing 1, pintle 2, at the uniform velocity tractive pintle 2 makes it and locking card 5 embedding mutually to breach 4 then, and keep sufficient and negative pressure that continue in the needle tubing this moment; With one hand hold a posture carry insert outer casing needle 3 in pathological changes allows among a small circle multiple spot, multi-directionly carry slottingly fast, treat (can go out pin when bois de rose granular stiff tissue (or Cell sap) is arranged in 10～30s) needle nipples.

Claims (4)

1, a kind of continuous negative pressure biopsy needle comprises disposable plastic needle tubing (1), pintle (2) and outer casing needle (3), and it is characterized in that: an incline of described pintle (2) is provided with the rectangular leg-of-mutton breach of end face (4); One end of described disposable plastic needle tubing (1) is provided with a locking card (5), and this locking card (5) outer rim links to each other with end face edge, inner edge and described breach (4) embedding mutually; The other end of described disposable plastic needle tubing (1) links to each other with described outer casing needle (3), and this outer casing needle (3) is a hollow, and built-in guiding nook closing member (6).

2, a kind of continuous negative pressure biopsy needle as claimed in claim 1 is characterized in that: described breach (4) is one or two.

3, a kind of continuous negative pressure biopsy needle as claimed in claim 1 is characterized in that: described outer casing needle (3) is complementary with described guiding nook closing member (6).

4, a kind of continuous negative pressure biopsy needle as claimed in claim 1, it is characterized in that: described outer casing needle (3) is unimodal monocline face, and the surface is provided with scale.

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