CN211433036U

CN211433036U - Suction type biopsy sampling device

Info

Publication number: CN211433036U
Application number: CN201922474689.2U
Authority: CN
Inventors: 谭振华; 沈光明
Original assignee: Jiangxi Tianchun Medical Products Co ltd
Current assignee: Jiangxi Tianchun Medical Products Co.,Ltd.
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an attraction formula biopsy sampling device, including handheld portion, thief rod and bullet head, be equipped with connecting portion in the handheld portion, the thief rod includes inner tube and outer tube, the one end opening other end of bullet head seals, the outer tube stretches into from bullet head open end and makes bullet head suit in the outside of outer tube, the thief hole has been seted up to the side of bullet head blind end, the inboard of thief hole is equipped with the sample cutting blade, the chamber footpath of bullet head inner chamber diminishes at the position of being close to bullet head blind end and forms second step face, blade track rear end extends to second step face and forms open end, it has the sealing ring to compress tightly between the preceding terminal surface of second step face and outer tube, the internal diameter of sealing ring is the big two conical surface structures in middle part little both ends, bullet head outside processing has breaks disconnected notch ring off with the fingers and thumb. The utility model is used for biopsy sampling in the clinical diagnosis process, and is convenient to operate; through the design sealing ring for the installation and the location of cutting appearance blade are more convenient, and the sealing ring can play sealed effect, and is effectual to the tissue suction when bleeding.

Description

Suction type biopsy sampling device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a suction type biopsy sampling device.

Background

In medicine, to determine the nature of a lesion in a human or animal body, it is common to directly sample the tissue of the lesion and then biopsy it. In the sampling process, the sampling method adopted is different according to the position of the lesion. For example, the surface of the human body can be directly sampled by a surgical cutting operation, and the sampling is simpler. However, in general, a hollow organ communicating with the body surface is directly cut by an endoscope and a related instrument, and therefore, this sampling method is relatively complicated and many instruments are used.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the invention provides an attraction type biopsy sampling device which comprises a handheld part, a sampling rod and a bullet head, wherein a connecting part for connecting the sampling rod is arranged on the handheld part, a through hole is processed in the connecting part, and the hole diameter of the front end of the through hole is smaller than that of the rear end of the through hole so that a step surface is formed in the through hole; the sampling rod comprises an inner tube and an outer tube, and the outer tube is fixedly arranged on a front end hole of the through hole, so that a channel of the outer tube is butted with the through hole; one end of the inner tube is provided with an air exhaust connecting part, and the other end of the inner tube extends into the through hole and the outer tube from the rear end hole of the through hole and extends out of the front end of the outer tube; an air exhaust duct is processed in the air exhaust connecting part, one end of the air exhaust duct is an air exhaust port, and the other end of the air exhaust duct is in butt joint communication with the inner pipe channel; a pressure spring is arranged between the air exhaust connecting part and the step surface, and a hole cover is covered on the rear end hole of the through hole, so that the air exhaust connecting part cannot be separated from the through hole; one end of the bullet head is open and the other end is closed, the outer tube extends into the bullet head from the open end of the bullet head to enable the bullet head to be sleeved outside the outer tube, a sampling hole is formed in the side face of the closed end of the bullet head, the inner side of the sampling hole is provided with a sample cutting blade, a blade track for clamping the sample cutting blade is arranged in the inner cavity of the bullet head, the sample cutting blade is attached to the inner side wall of the sampling hole, the sample cutting blade can slide along the blade track, the cavity diameter of the inner cavity of the bullet head is reduced at the position close to the closed end of the bullet head to form a second step surface, the rear end of the blade rail extends to the second step surface to form an open end, a sealing ring is compressed between the second step surface and the front end surface of the outer tube, the inner diameter of the sealing ring is of a double-conical-surface structure with a small middle part and two large ends, the front end surface or the outer wall of the inner pipe is tightly attached to the double conical surfaces, and the outside of the bullet head is provided with a breaking groove ring.

Further, the distance from the second step surface to the top of the closed end of the bullet head is more than or equal to 1 cm.

Furthermore, a push rod is arranged on the air exhaust connecting part or the inner tube, and a notch used for avoiding the moving position of the push rod is processed at the rear end hole of the through hole.

Furthermore, an internal thread is processed in the rear end hole of the through hole, an external thread is processed on the hole cover, and the hole cover is installed in the through hole in a threaded fit mode.

Furthermore, scale marks are marked on the outer portions of the bullet head and the outer tube along the axial extension direction of the outer tube.

Furthermore, the open end of the bullet head is provided with an L-shaped clamping groove, the outer portion of the outer tube is provided with a clamping convex point, and the clamping convex point is clamped into the L-shaped clamping groove.

Furthermore, an observation hole is processed on the sample cutting blade.

According to the technical scheme, the utility model discloses an advantage is:

1. the utility model is used for biopsy sampling in the clinical diagnosis process, and has convenient operation, simplicity and practicability;

2. by designing the sealing ring, the installation and the positioning of the sample cutting blade are more convenient, the sealing ring can play a role in sealing, and the tissue suction effect is good during air suction;

3. through the outside processing scale mark at bullet head and outer tube, the understanding bullet head that can be accurate stretches into the degree of depth of human tissue for the sample location is more accurate, thereby diagnostic result reliability is better.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a longitudinal cross-sectional view of the present invention (the gray area in the figure is a cross-sectional view);

FIG. 3 is a schematic view of the structure of the bullet tip region of FIG. 2;

fig. 4 is a transverse sectional view of the bullet after fitting with a sample cutting blade (gray area in the figure is a cross section).

Detailed Description

As shown in FIGS. 1-4, a suction type biopsy sampling device comprises a hand-held portion 1, a sampling rod and a bullet head 2. The handheld part 1 is provided with a part 101 convenient to hold and a connecting part 102 used for connecting a sampling rod, a through hole 3 is processed in the connecting part 102, and the front end aperture of the through hole 3 is smaller than the rear end aperture so that a step surface 4 is formed in the through hole. The thief rod comprises an inner tube 5 and an outer tube 6. The outer tube 6 is fixedly installed on the front end hole of the through hole 3 so that the passage of the outer tube 6 is butted against the through hole 3. The one end of inner tube 5 is installed and is taken out connecting portion 7, and the other end stretches into through-hole 3 and outer tube 6 by the rear end hole 8 of through-hole to the front end that stretches out the outer tube extends. An air exhaust duct 9 is processed in the air exhaust connecting part 7, one end of the air exhaust duct 9 is an air exhaust opening 10, and the other end of the air exhaust duct is in butt joint communication with the inner pipe channel. The suction opening 10 is connected with a syringe (or other suction devices, in this embodiment, a syringe commonly used in clinical practice is taken as an example), and the joint of the suction duct 9 and the inner tube passage is closed (for example, the joint can be closed in an interference fit manner), so as to prevent air leakage. A pressure spring 11 is arranged between the air exhaust connecting part 7 and the step surface 4, the air exhaust connecting part 7 is pushed forwards to compress the pressure spring 11, and then the inner tube 5 is driven to push forwards. For convenient operation, be equipped with push rod 23 on the connecting portion 7 of bleeding, the rear end hole department of through-hole is processed there is the notch 24 that is used for dodging the push rod shift position, promotes push rod 23 and can realize the forward movement of inner tube 5. 8 upper covers in rear end hole of through-hole 3 are equipped with handhole door 12 for bleed connecting portion 7 can not deviate from in the through-hole 3, handhole door 12 and through-hole 3 can adopt screw-thread fit connection form, promptly: an internal thread is processed in the rear end hole of the through hole 3, an external thread is processed on the hole cover 12, and the hole cover is installed in the through hole in a threaded fit mode. One end of the bullet head 2 is open and the other end is closed, and the outer tube 6 extends into the bullet head from the bullet head open end 13, so that the bullet head 2 is sleeved outside the outer tube 6. For guaranteeing that outer tube 6 and bullet head suit are firm and can not deviate from in the use, bullet head 2 and outer tube 6 can adopt a little more than sufficient cooperation, and further, can be at bullet head open end processing L type draw-in groove 14, be equipped with joint bump 15 in the outside of outer tube 6, joint bump 15 card goes into L type draw-in groove 14 back, rotates bullet head 2 and makes L type draw-in groove 14 catch joint bump 15, has improved the firm degree of outer tube 6 and bullet head suit. The side of the closed end of the bullet head 2 is provided with a sampling hole 16, and the inner side of the sampling hole 16 is provided with a sample cutting blade 17. A blade track 18 for clamping a sample cutting blade is arranged in the inner cavity of the bullet head 2, and the sample cutting blade 17 is attached to the inner side wall of the sampling hole 16. The cutting blade 17 is slidable along the blade rail 18 under a pushing force. The cavity diameter of the inner cavity of the bullet head 2 is reduced to form a second step surface 19 at the position close to the closed end of the bullet head, and the distance from the second step surface to the top of the closed end of the bullet head is 2.2 cm. The rear end of the blade track extends to the second step surface 19 to form an open end from which the cutting blade 17 can be snapped into the blade track 18. Compress tightly between the preceding terminal surface of second step face 19 and outer tube 6 and have sealing ring 20, sealing ring 20's internal diameter is the big two conical surface 21 structures in the little both ends in middle part, the preceding terminal surface of inner tube or outer wall paste tightly on two conical surface 21, the generating line of two conical surface 21 and the contained angle of sealing ring axis can be designed for 10 ~ 15. The advantages of designing the seal ring 20 are: 1. in the device assembling process, the sample cutting blade 17 needs to be installed in the blade track 18 through a tool, and as the blade track 18 is located in the inner cavity of the bullet head 2, the inner diameter of the inner cavity of the bullet head 2 is usually smaller, the sample cutting blade 17 is difficult to accurately position when being installed in the blade track 18, and the sample cutting blade 17 is very easy to be inserted into the blade track 18 too much to block the sampling hole 16. When the sample cutting blade 17 blocks the entire sampling hole 16, it is difficult to retract the sample cutting blade 17 again, and the entire bullet head 2 is thus discarded. By designing the sealing ring 20, when the sample cutting blade 17 is installed, only a small part of the sample cutting blade 17 needs to be installed in the blade rail 18 (the sample cutting blade 17 does not fall off), and accurate positioning is not required. The sealing ring 20 is then inserted into the open end 13 of the bullet 2 and inserted into the outer tube 6, the end face of the outer tube 6 pushing the sealing ring 20 into the interior cavity of the bullet 2. When the sealing ring 20 touches the cutting blade 17, the cutting blade 17 in turn snaps into the blade track 18 as the sealing ring advances. When the sealing ring 20 is tightly attached to the second step surface 19, the cutting blade 17 cannot be further pushed, and the cutting blade 17 is just positioned at the accurate installation position, so that the excessive pushing of the cutting blade 17 is avoided. 2. After the installation is finished, the second step surface 19 and the front end surface of the outer tube 6 clamp the sealing ring 20, so that certain sealing performance between the second step surface 19 and the sealing ring 20 and between the front end surface of the outer tube 6 and the sealing ring 20 is ensured, and the adsorption of tissues is not influenced by a large amount of air leakage in the air exhaust process. And the inner diameter of the sealing ring 20 is a double-conical surface 21, so that the installation direction of the sealing ring 20 does not need to be considered during installation, and the installation time is saved. Meanwhile, before the inner tube 5 is not pushed forward, the front end surface of the inner tube is attached to the conical surface of the biconical surface 21, so that a certain sealing effect is achieved; when the inner pipe 5 is pushed in, the inner pipe is squeezed into the double-conical surface 21, and at the moment, the top of the double-conical surface 21 and the outer part of the inner pipe form a line seal, so that the sealing effect can be continuously achieved. The breaking-off groove ring 22 is processed outside the bullet head 2, so that the closed end of the bullet head can be conveniently broken off along the breaking-off groove ring 22 after sampling is finished, and a biopsy is taken out. The bullet head 2 with the outside of outer tube is still carved with the scale mark along outer tube axial direction of extension, and the understanding bullet that can be accurate during the operation stretches into the degree of depth of human tissue for the sample position is more accurate, thereby diagnostic result reliability is better.

The sealing ring and the bullet head can be made of plastic with certain elasticity, such as PE plastic, and the inner tube, the outer tube, the handheld part 101 and the connecting part 102 can be made of medical stainless steel, so that the processing and the manufacturing are convenient. Can realize among the prior art technical scheme and technical effect's all materials all can be used for making the utility model discloses a part, the selection of above-mentioned material is only the utility model discloses an embodiment is not understood right the utility model discloses technical scheme's restriction.

During the use, extraction opening 10 passes through the hose connection syringe, and the bullet head with the sampling forceps stretches into the human body and treats the sample site (taking the intestinal as an example), observes the depth of insertion to required position through the scale mark, then pulls the syringe and takes out air, forms the negative pressure in the inner tube 5 for the tissue in the intestinal is through 16 partial inner chambers that inhale the bullet head of thief hole. The push rod 23 is pushed, so that the inner tube 5 pushes the sample cutting blade 17 to cut off and sample the tissue sucked into the inner cavity of the bullet head, and then the bullet head is taken out. Alternatively, a viewing hole 25 may be formed in the cutting blade 17, and whether or not sampling is successful may be observed through the viewing hole 25. Generally, the tissue sucked into the bullet is larger than the observation hole, and the tissue does not leak out of the observation hole. After sampling, the closed end of the bullet is broken off along the breaking groove ring 22, and the sample is taken out for inspection.

The technical solution provided by the present invention has been described in detail, and to the general technical personnel in the field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.

Claims

1. The suction type biopsy sampling device is characterized by comprising a handheld part, a sampling rod and a bullet head, wherein a connecting part for connecting the sampling rod is arranged on the handheld part, a through hole is processed in the connecting part, and the hole diameter of the front end of the through hole is smaller than that of the rear end of the through hole so that a step surface is formed in the through hole; the sampling rod comprises an inner tube and an outer tube, and the outer tube is fixedly arranged on a front end hole of the through hole, so that a channel of the outer tube is butted with the through hole; one end of the inner tube is provided with an air exhaust connecting part, and the other end of the inner tube extends into the through hole and the outer tube from the rear end hole of the through hole and extends out of the front end of the outer tube; an air exhaust duct is processed in the air exhaust connecting part, one end of the air exhaust duct is an air exhaust port, and the other end of the air exhaust duct is in butt joint communication with the inner pipe channel; a pressure spring is arranged between the air exhaust connecting part and the step surface, and a hole cover is covered on the rear end hole of the through hole; one end of the bullet head is open and the other end is closed, the outer tube extends into the bullet head from the open end of the bullet head to enable the bullet head to be sleeved outside the outer tube, a sampling hole is formed in the side face of the closed end of the bullet head, the inner side of the sampling hole is provided with a sample cutting blade, a blade track for clamping the sample cutting blade is arranged in the inner cavity of the bullet head, the sample cutting blade is attached to the inner side wall of the sampling hole, the sample cutting blade can slide along the blade track, the cavity diameter of the inner cavity of the bullet head is reduced at the position close to the closed end of the bullet head to form a second step surface, the rear end of the blade rail extends to the second step surface to form an open end, a sealing ring is compressed between the second step surface and the front end surface of the outer tube, the inner diameter of the sealing ring is of a double-conical-surface structure with a small middle part and two large ends, the front end surface or the outer wall of the inner pipe is tightly attached to the double conical surfaces, and the outside of the bullet head is provided with a breaking groove ring.

2. The aspiration biopsy sampling device of claim 1, wherein the second step surface is spaced from the top of the closed end of the bullet by a distance of 1cm or more.

3. The aspiration biopsy sampling device of claim 1, wherein the suction connection portion or the inner tube has a push rod, and a notch for avoiding a moving position of the push rod is formed at a rear end hole of the through hole.

4. The aspiration biopsy sampling device of claim 1, wherein the rear end of the through hole has an internal thread formed therein and the cap has an external thread formed thereon, the cap being mounted in the through hole by a threaded engagement.

5. The aspiration biopsy sampling device of claim 1, wherein the bullet heads and the outer portion of the outer tube are further marked with graduations along the axial extension of the outer tube.

6. The aspiration biopsy sampling device of claim 1, wherein the open end of the bullet head is provided with an L-shaped slot, and the outer portion of the outer tube is provided with a snap-fit protrusion, and the snap-fit protrusion is snapped into the L-shaped slot.

7. The aspiration biopsy sampling device of claim 1, wherein the cutting blade has a viewing aperture formed therein.