CN2074166U - Single hole casing-type biopsy needle for detecting cancers in soft tissue - Google Patents

Abstract

The utility model discloses a single hole casing-type biopsy needle for detecting cancers in the soft tissue, adopting a casing-type structure. A solid slope is introduced to the needle tip of an outer tube, a cutting knife with a barb is arranged on a position keeping a certain distance with the upper part of the slope, and the length of an inner tube is matched with the cutting knife with the barb; besides, a needle head is a reverse 'M'-typed cutting knife, a semi-tube shape is arrangedon a position whose length is one tenth of that of the needle head, and the two sides of the needle head are in the shape of a saw blade. The needle head of the inner tube is matched with the barb of the outer tube, and the tissue of the cancer is directly punctured and cut by utilizing the special structure of the needle head. The method of the operation is convenient and rapid, the injury to the tissue is small, and the serious complication is not generated; under the clinical probation of 46 patients, the effective rate is 100%, and the rate of the accurate diagnosis is 93.5%.

Description

Single hole casing-type biopsy needle for detecting cancers in soft tissue

A kind of single hole bushing type soft tissue neoplasms biopsy needle.This utility model belongs to medical apparatus and instruments, is used for biopsy.

Biopsy is previously generally adopted the surgical incision biopsy, and pin is inhaled means such as exfoliative cyte, but because to cut damage bigger, is difficult for being accepted by the patient; Pin is inhaled to come off its limitation, and misdiagnosis rate is higher.

The purpose of this utility model is: develop a kind of non-pin and inhale single hole bushing type soft tissue aspiration biopsy pin, special construction by needle tubing itself is directly drawn materials to tumor tissue cutting, overcome above-mentioned shortcoming, reduce patient's misery, and can reach the purpose of otch biopsy fully.

Structure of the present utility model is: this pin is a bushing type, and the long 7cm of syringe needle, outer tube needle point are solid inclined-plane, apart from ramp 0.4mm place, a barb cutting knife (seeing accompanying drawing 1) is arranged, and diameter of inner pipe is slightly less than outer tube diameter (seeing accompanying drawing 2).Interior pipe range is corresponding with outer tube barb cutting knife, and syringe needle is the semicanal type for falling " M " type cutting knife apart from syringe needle 1/10 place, and both sides are zigzag, and there is radian at the place apart from syringe needle.For interior bobbin head and outer tube barb otch are harmonious.Nook closing member length is with whole needle body length, and diameter is slightly less than inner tube diameter.Release the tumor tissues that stores in interior pipe and the outer tube pipe after being used to get pin.

Fig. 1 is an outer tube front view of the present invention, and Fig. 2 faces and side view for interior pipe, and 2 of a, b are for aligning key among Fig. 1,2, and A is that amplify at the A place among Fig. 2.

Operation using method of the present utility model: inner tube is inserted in outer tube, and serrated face is downward, and cutting knife is harmonious in the outer tube cutting knife. According to size and the character of tumour, determine point of puncture. When pin enters tumour, inner tube is mentioned more than the outer tube cutting knife breach, lift then outer tube, when resistance sense, inner tube is resetted, sawtooth can be drawn in inner tube with the tumor tissues of cutting when doing to move for the second time. And then carry out 3-4 time to other orientation of tumour and puncture. Pin is transferred to, with nook closing member the tumor tissues that stores in inner tube and the outer tube is released, do respectively pathology and cytolgical examination.

Major advantage of the present utility model: single hole casing-type biopsy needle for detecting cancers in soft tissue, by the special construction of needle tubing itself, directly tumor tissue cutting is drawn materials. Method of operating is easy, quick, damage less, no complication, reduced patient's misery, and can reach the purpose of incision biopsy fully. Clinical practice and result are good. Clinical practice 40 examples, wherein tumor of breast 16 examples, sub-dermal soft tissue tumour 14 examples, lymph node 13 examples, skin neoplasin 3 examples. Aspiration biopsy is disposable success all, and severe complication does not take place. Wherein Partial tumors once repeatedly pin inhale cast-off cells and fail to make a definite diagnosis, and take all successes of aspiration biopsy.

Empirical evidence: single hole bushing type soft tissue neoplasms biopsy needle, should not overemphasize fine needle, pin is too carefully drawn materials difficult, must increase puncture time, prolong the operating time, the more tumor biopsy of fibre composition is difficult to successfully, also is difficult to clarify a diagnosis even obtain to organize on a small quantity.My institute adopts the 18-20 bodkin to the above soft tissue neoplasms of 5cm, and the result draws materials extensively, and the biopsy piece is bigger, obtains the effect of being satisfied with.

Claims (3)

1, a kind of single hole bushing type soft tissue neoplasms biopsy needle is characterized in that it is solid by tip portion, and the outer tube and the tip portion of band barb cutting knife are semicanal, and the tip band is serrate interior pipe in " M " type cutting knife both sides and inner core composition.

2, single hole bushing type soft tissue neoplasms biopsy needle according to claim 1, it is characterized in that pipe box closes in the outer tube after, " M " type cutting knife that falls of the barb cutting knife of outer tube and interior pipe suits mutually.

3, single hole bushing type soft tissue neoplasms biopsy needle according to claim 1 is characterized in that the needle handle of outer tube and interior pipe partly aligns key.