CN102697527B - External sealed rectum mucous membrane attraction biopsy device - Google Patents

Abstract

An external sealed rectal mucosa suction biopsy device relates to the manufacturing technology of rectal mucosa suction biopsy surgical instruments, and is suitable for performing biopsy surgery on rectal mucosa. It mainly consists of a biopsy knife jacket (1), a biopsy knife (2), and a biopsy catheter (6 ), a biopsy knife rod (7), a sealing collar (9), and an elastic sealing sleeve (10), wherein the elastic sealing sleeve (10) is set outside the rear part of the biopsy knife pulling rod (7), and is sealed by the sealing collar (9) Secures to the rear of the biopsy catheter (6). The suction biopsy device of the invention has simple and reasonable structure, good sealing performance, low manufacturing cost and good economic and social benefits.

Description

External Sealed Rectal Mucosa Suction Biopsy Device

technical field

The utility model relates to an external sealed rectal mucosa suction biopsy device, which relates to a rectal mucosa suction biopsy surgical instrument manufacturing technology, and is suitable for performing biopsy surgical examination on the rectal mucosa.

technical background

In clinical medicine, many intestinal diseases can only be diagnosed through the histopathological observation of living tissue. As far as the common congenital Hirschsprung’s disease and its related diseases are concerned, the diagnosis of the disease by excising the rectal mucosa is the gold standard for diagnosis , has become a recognized clinical routine project. The most commonly used, safe and effective method for cutting rectal mucosal tissue is negative pressure biopsy. Mucosa suction biopsy instrument has been used in foreign countries for nearly half a century, and it is a commonly used instrument in clinical medicine. Over the years, some manufacturers and experts in my country have jointly developed several kinds of intestinal mucosal tissue suction biopsy forceps, but due to various technical obstacles, high product prices, short lifespan, and difficult maintenance, the production has been discontinued successively. However, foreign products are sold domestically, and their product prices are more expensive, which seriously affects the development of this routine test in our country.

The working principle of the existing mucosal suction biopsy instrument is: rectal mucosal tissue suction biopsy instrument head end is the bullet-shaped biopsy knife coat, and side wall has small garden hole, and the cylindrical biopsy knife of coat is built-in. During work, the intestinal mucosal tissue is sucked into the side wall hole of the biopsy knife jacket through negative pressure, and the sucked mucosal tissue can be cut off by pulling the biopsy knife, and the tissue sample can be taken out after the jacket is removed and sent for pathological examination. Its basic structure is divided into three parts: one is negative pressure generation and sealing maintenance system, including negative pressure generating equipment (commonly used medical syringes, connected to the suction port of biopsy instruments through rubber tubes), sealing parts of biopsy instruments (often connected to biopsy The pull rod of the knife passes through the center of the sealing rubber gasket, and the sealing rubber gasket is in close contact with the pull rod to achieve the effect of isolating the air,); the second is the detachable biopsy head, including the head cover and the built-in blade; the third is the back-pull biopsy knife The transmission mechanism includes the biopsy blade pull rod, the force handle (pistol handle type or scissor handle type) and the power transmission parts connected with the biopsy knife pull rod. During the actual operation, the operator holds the guide rod in one hand to send the biopsy knife head into the rectum, puts the side with the side hole close to the rectal wall, and holds the instrument handle in the other hand. The operator's assistant pushes the syringe core connected to the biopsy instrument back At this time, part of the rectal mucosal tissue is sucked into the side hole of the knife head, and the operator quickly pinches the handle to cut off the suctioned mucosal tissue; then remove the knife head, and collect the mucosa near the biopsy blade Tissue samples were sent for histopathological examination.

The shortcoming of existing this kind of equipment: Although this kind of equipment has been improved in recent years, it is mainly reflected in the biopsy cutter head part, and the biopsy cutter head is changed into a disposable part to ensure that the blade is sharp and reduce the mutual contamination between patients. The price of the device itself is more than 10,000 yuan, and the price of a single disposable plastic knife head is 300 yuan. However, similar domestic products, due to the complex design of the device and high manufacturing technology requirements, cost more than RMB 4,000. After repeated use and high-temperature sterilization, the components are prone to aging and wear, and the sealing gaskets in the negative pressure seal maintenance system are often prone to damage. Leakage barriers require repeated repairs or the entire device is scrapped, which also makes it difficult to promote domestic biopsy devices.

Contents of the invention

Aiming at the shortcomings of existing mucosal suction biopsy devices, the inventors have provided a rectal mucosa suction biopsy device with simple structure, good sealing performance, low product manufacturing cost and external sealing after long-term research.

The suction biopsy device of the present invention is mainly composed of a biopsy knife jacket, a biopsy knife, a biopsy device catheter, a biopsy knife pull rod, a sealing hoop, and an elastic sealing sleeve, and the whole suction biopsy device is in the shape of a straight tube. One side of the biopsy knife overcoat is provided with a biopsy hole, and the biopsy knife overcoat is fixed on the front part of the biopsy catheter by thread sealing, and the biopsy knife overcoat and the biopsy catheter are made of medical plastic or stainless steel. The biopsy knife is set in the biopsy knife jacket, and is fixedly connected with the front part of the biopsy knife pull rod in the biopsy catheter, and an enlarged hand handle is placed at the rear end of the biopsy knife pull rod, so that the operator can squeeze the handle tightly , quickly pull the biopsy knife. The elastic sealing sleeve is sheathed outside the rear part of the biopsy knife pull rod, and is sealed and fixed on the rear part of the suction biopsy device catheter by a sealing hoop. The sealing elastic sleeve is made of a material with good extensibility. The suction biopsy device of the present invention communicates with the negative pressure generating and maintaining equipment through the rubber tube, and generates negative pressure in the suction biopsy device and maintains the negative pressure state through the negative pressure generating and maintaining equipment during operation.

The advantage of the present invention attracts biopsy device is:

1. The external sealing method, which is sealed and fixed at the rear of the biopsy catheter by an elastic sealing sleeve, has changed the existing built-in sealing method using sealing gaskets. It has good sealing performance and avoids the aging and wear of sealing gaskets. Suction biopsy instrument leaks, leading to failure of biopsy surgery.

2. With the external sealing method of the elastic sealing sleeve, the movement of the biopsy knife rod is always carried out under a stable negative pressure state during the operation, which avoids the need to continuously generate and maintain the negative pressure in order to maintain the stability of the negative pressure during the operation. The operation can effectively ensure the smooth progress of the biopsy operation and can well meet the actual clinical needs.

3. The suction biopsy device of the present invention abandons the operating handle and transmission parts of the existing suction biopsy instrument, greatly simplifies the structure of the suction biopsy device, and makes the shape of the suction biopsy device a straight tube shape that is convenient for operation and carrying, which not only effectively reduces the The manufacturing cost of the product has good economic and social benefits.

Description of drawings

Accompanying drawing is the schematic diagram of embodiment of the present invention,

Fig. 1 is a schematic diagram of the suction biopsy device of the present invention,

Fig. 2 is a schematic structural diagram of the suction biopsy device of the present invention.

Among them: biopsy knife cover 1, biopsy knife 2, biopsy hole 3, connecting flange 4, sealing gasket 5, biopsy catheter 6, biopsy knife pull rod 7, negative pressure connecting tube 8, sealing hoop 9, elastic sealing sleeve 10, hand Knob 11.

Detailed ways

The present invention will be further described in conjunction with accompanying drawing:

The suction biopsy device of the present invention consists of a biopsy knife jacket 1, a biopsy knife 2, a biopsy hole 3, a connecting flange 4, a sealing gasket 5, a biopsy catheter 6, a biopsy knife pull rod 7, a negative pressure connecting pipe 8, a sealing hoop 9, and an elastic seal The cover 10 is composed of a handle 11, which is a straight tube-shaped suction biopsy device. One side of the biopsy knife overcoat 1 is provided with a biopsy hole 3, and the sealing gasket 5 is arranged on the connecting flange 4 at the front of the biopsy catheter 6, and the bottom of the biopsy knife overcoat 1 is threaded with the connecting flange at the front of the biopsy catheter 6. After the edge 4 is fixedly connected, the sealing gasket 5 prevents negative pressure leakage at the connection part. The biopsy knife overcoat 1 and the biopsy catheter 6 are made of medical plastic or stainless steel. The biopsy knife 2 is arranged in the biopsy knife overcoat 1, and is fixedly connected with the front portion of the biopsy knife pull bar 7 arranged in the biopsy knife guide tube 6, and an annular handle 11 is arranged at the rear end of the biopsy knife pull bar 7, so that When the operator squeezes the handle 11 to pull the biopsy knife 2, the elastic sealing sleeve 10 is set outside the rear part of the biopsy knife pull rod 7, and is sealed and fixed on the rear part of the biopsy catheter 6 by the sealing ring 9. The negative pressure connecting tube 8 is sealed and fixed on the rear portion of the suction biopsy device, communicated with the negative pressure generation and maintenance equipment through the rubber tube, and the suction biopsy device of the present invention generates negative pressure and maintains the negative pressure state through the negative pressure generation and maintenance equipment. When the present invention attracts the biopsy device to work, the mucous membrane tissue of the rectum is sucked into the biopsy hole 3 of the biopsy knife jacket 1 through negative pressure, and the elastic sealing sleeve 10 is flat at this time, and the operator pulls the biopsy knife 2 through the elastic sealing sleeve 10 The mucosal tissue of the rectal tube in the aspiration biopsy hole 3 was excised. After the suction biopsy device is taken out from the rectum, the biopsy knife jacket 1 is removed, the biopsy knife 2 is disassembled, and the intestinal mucosal tissue specimen is taken out and sent for pathological examination.

Claims (1)

1. the rectal mucosa suction biopsy apparatus of external sealing, by biopsy cutter overcoat (1), biopsy cutter (2), biopsy hole (3), flange connector (4), seal washer (5), biopsy device conduit (6), biopsy cutter pull bar (7), negative pressure connection tube (8), sealing hoop (9), elastic seal cartridge (10), hands squeezing handle (11) composition, it is characterized in that: a side of biopsy cutter overcoat (1) has biopsy hole (3), seal washer (5) is arranged on the anterior flange connector (4) of biopsy device conduit (6), after the bottom of biopsy cutter overcoat (1) is fixedly connected with by the screw thread flange connector (4) anterior with biopsy device conduit (6), biopsy cutter (2) is arranged in biopsy cutter overcoat (1), be fixedly connected with the front portion that is located at the biopsy cutter pull bar (7) in biopsy device conduit (6), be equipped with circular hands squeezing handle (11) in the rear end of biopsy cutter pull bar (7), elastic seal cartridge (10) is enclosed within outside the rear portion of biopsy cutter pull bar (7), be fixed on the rear portion of biopsy device conduit (6) by sealing hoop (9) sealing, negative pressure connection tube (8) produces with negative pressure by rubber tube and the equipment that maintains is communicated with,

Described suction biopsy apparatus is Straight.

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