CN2336751Y - Screw groove type aspiration biopsy needle - Google Patents

Abstract

The utility model relates to a screw groove type aspiration biopsy needle, which is an aspiration biopsy needle used for diagnosing in medical treatment. The utility model is composed of a needle body, a needle holder and a needle pistil. The utility model has the structural characteristic that spiral grooves are arranged at a point which is 15 millimeters from the front of the needle body, and the spiral groove has an angle of-45 DEG. The spacing between the spiral grooves is 2.8 millimeters. The groove edge is sharp, which has cutting action. The surface of the needle body is provided with a scale every 20 millimeters, so the needle body is convenient for an operator to control the depth. The utility model has the advantages of little pain, little hemorrhage and high positive rate. The utility model is suitable for the aspiration biopsy of organs at deep part, such as a lung, a liver, a spleen, a kidney, a pancreas, etc. The utility model is particularly suitable for the diagnosis of the aspiration biopsy of an early tumour which is less than 2 cm.

Description

Spiral groove type aspiration biopsy pin

This utility model relates to diagnosis aspiration biopsy pin in a kind of medical treatment.

Existing various aspiration biopsy pins mainly contain:

1, domestic most hospitals use import aspiration biopsy pin, carry out the aspiration biopsy of deep internal organs such as lung, liver,spleen,kidney, and price is higher, 140～250 yuans every, are 10～20 times of homemade pin.

2, homemade No. 9 lumbar puncture needles be domestic minority hospital as the aspiration biopsy succedaneum, by needle section Horse hoof face cutting focus, carry up and down in the puncture and insert and do the taper puncture during puncture, tissue injury's area is bigger, hemorrhage more, therefore, the aspiration biopsy positive rate is relatively low.

3, homemade Qin Shi slot type needle tip is forked, and resistance is big when puncturing into skin, and the painful sense of patient is stronger, needle point and to hold pin portion flexible, and easily carry under one's arms in the needle tray during puncture skin or subcutaneous tissue reduced positive rate, and the site of puncture are hemorrhage more.

4, Chinese patent " helical edges biopsy needle " (89219629.4) is made up of core pin, sleeve pipe and spiral needle, and a zigzag shape sword is arranged at the spirillum top.Change the spiral needle cutting again after must inserting with the stamen pin earlier during use, operation is trouble.Be applicable to the diagnosis of soft tissue and skeletal diseases.

At above prior art weak point, this utility model purpose is a kind of aspiration biopsy pin of design, and it is little to have pain, goes out insufficiency of blood, the characteristics that positive rate is high.

This practical structure is: the spiral groove type aspiration biopsy pin of diagnosis usefulness in a kind of medical treatment, comprise needle body (1), needle stand (2), pin stamen (3), needle body (1) is connected with needle stand (2), pin stamen (3) is a solid fine needle and can carries slottingly that needle body (1) is shaped on a helicla flute (4) on the front portion in hollow needle body (1).

Helicla flute is positioned at needle body the place ahead 15mm scope.Helicla flute is 42 °～45 °, helix pitch 2.8mm.Needle body (1) posterior face is shaped on scale every 20mm.

This utility model advantage is: be the cutting action that turns clockwise when this biopsy needle is taked specimen, under negative pressure-pumping, little to the specimen damage, can really take out specimen, the specimen of getting can be carried out cytology or histodiagnosis, with domestic like product relatively have pain little, go out insufficiency of blood, characteristics that positive rate is high, be applicable to the aspiration biopsy of deep internal organs such as lung, liver,spleen,kidney, pancreas, the outstanding aspiration biopsy diagnosis that is suitable for less than 2 centimetres of infantile tumours has certain practical value and potential social benefit.

Accompanying drawing is this utility model structural representation.

Embodiment: this pin is changed a social system on homemade No. 9 lumbar puncture needle bases, guaranteeing that it meets under the health ministry ministry standard situation, processing 45 helicla flute in 15 millimeters from the needle point to the needle body, helicla flute spacing 2.8mm, groove knife edge profit is cut assurance rustless steel needle point, needle body hardness and suppleness in the processing technique in cold cut, makes helicla flute knife edge profit, be convenient to cutting, must not be jagged etc. defective.

Calculate backward from needle point, 1 mm wide circumference scale is made for per 20 millimeters in the needle body surface, is convenient to the operator and grasps paracentesis depth.Its technology does not influence the needle body surface smoothness, reaches external like product level.

Processing back needle body, pin stamen do not have equipped error.

Claims (4)

1, the spiral groove type aspiration biopsy pin of diagnosis usefulness in a kind of medical treatment, comprise needle body (1), needle stand (2), pin stamen (3), needle body (1) is connected with needle stand (2), pin stamen (3) is a solid fine needle and can carries slottingly in hollow needle body (1), it is characterized in that being shaped on a helicla flute (4) on needle body (1) front portion.

2,, it is characterized in that helicla flute is positioned at needle body the place ahead 15mm scope according to the described aspiration biopsy pin of claim 1.

3,, it is characterized in that helicla flute is 42 °～45 °, helix pitch 2.8mm according to the described aspiration biopsy pin of claim 1.

4,, it is characterized in that needle body (1) posterior face is shaped on scale every 20mm according to the described aspiration biopsy pin of claim 1.