Continuous sampling surgical instruments

Abstract

The present application provides a continuous sampling surgical instrument, including a clamp head, an outer tube and an inner tube that can be switched between an open state and a closed state. The clamp head is slidably matched with the outer tube. The inner tube is inserted into the outer tube and is slidably matched with the outer tube in the extension direction of the outer tube; one end of the inner tube is connected to the clamp head, and the other end of the inner tube is used to connect with a negative pressure device or an injection device, and the negative pressure device is used to generate negative pressure in the lumen of the inner tube to absorb the tissue sampled by the clamp head from the clamp head to the lumen of the inner tube; the inner tube is used to drive the clamp head to move relative to the outer tube so that the clamp head can switch between an open state and a closed state. Continuous sampling can be achieved while the sampling instrument is always kept in the endoscope clamp channel, with low difficulty in operation, short operation time, high efficiency, low risk and inconvenience in operation.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a continuous sampling surgical instrument. Background Art

[0002] Disposable biopsy forceps are commonly used instruments for endoscopic examination and treatment. They are transmitted and controlled by the handle to control the work of the head and complete the sampling of living tissue through the endoscopic channel (such as gastrointestinal endoscope or respiratory endoscope, etc.).

[0003] The inventor has found that the existing biopsy forceps have the following disadvantages:

[0004] The existing products require the biopsy forceps to be withdrawn and the sample to be taken out after each biopsy, which takes a long time, increases the surgical risk and is extremely inconvenient to operate. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous sampling surgical instrument, which can realize continuous sampling, shorten the operation time, reduce the operation risk, and is flexible and convenient to operate.

[0006] The embodiment of the present invention is achieved as follows:

[0007] The present invention provides a continuous sampling surgical instrument, comprising:

[0008] A clamp head having a switchable state between an open state and a closed state;

[0009] An outer tube, the clamp head slidably cooperates with the outer tube;

[0010] And an inner tube, the inner tube is inserted into the outer tube and slidably matched with the outer tube in the extension direction of the outer tube; one end of the inner tube is connected to the clamp head, and the other end of the inner tube is used to connect with a negative pressure device or an injection device, the negative pressure device is used to generate negative pressure in the lumen of the inner tube, so as to absorb the tissue sampled by the clamp head from the clamp head to the lumen of the inner tube; the inner tube is used to drive the clamp head to move relative to the outer tube, so that the clamp head can switch between an open state and a closed state.

[0011] In an optional embodiment, the pliers head includes a mounting tube and two clamp arms, both clamp arms are connected to the mounting tube, and the two clamp arms can be switched between an open state and a closed state; the mounting tube is slidably matched with the outer tube, and the mounting tube is connected to the inner tube.

[0012] In an optional embodiment, the inner tube is inserted into the mounting tube.

[0013] In an optional embodiment, the clamp arms are configured as elastic arms; the two clamp arms can abut against the inner wall of the outer tube and retract into the outer tube when the inner tube slides along a first direction, so that the two clamp arms are switched from an open state to a closed state; the two clamp arms can also extend out of the outer tube and restore deformation when the inner tube slides along a second direction opposite to the first direction, so that the two clamp arms are switched from a closed state to an open state.

[0014] In an optional embodiment, the tube cavity of the mounting tube has a reducing section, the cross-sectional area of ​​the reducing section gradually decreases in a direction from one end of the mounting tube close to the clamp arm to an end away from the clamp arm, and the inner tube is connected to the end of the reducing section away from the clamp arm, wherein the cross section is a plane perpendicular to the axis of the mounting tube.

[0015] In an optional embodiment, the cross-sectional shape of the diameter-changing section is circular or square.

[0016] In an optional embodiment, the clamp head is detachably connected to the inner tube.

[0017] In an optional embodiment, both the outer tube and the inner tube are bendable tubes.

[0018] In an optional embodiment, the continuous sampling surgical instrument further includes a fixed head, which is fixedly connected to the outer tube, and the forceps head is inserted into the fixed head and slidably cooperates with the fixed head.

[0019] In an optional embodiment, an anti-slip protrusion is provided on the fixing head, and the anti-slip protrusion is used to abut against the pliers head to prevent the pliers head from detaching from the fixing head during the process of switching from a closed state to an open state.

[0020] The beneficial effects of the embodiments of the present invention are:

[0021] In summary, the continuous sampling surgical instrument provided in this embodiment cooperates with an endoscope, the surgical instrument is placed into the patient's body, the forceps head is adjusted to an open state, and the tissue to be sampled is located in the area where the forceps head can sample. Then, the handle structure connected to the inner tube is used to drive the inner tube to slide relative to the outer tube along the extension direction of the outer tube, and the forceps head is driven by the inner tube to move relative to the outer tube, so that the forceps head is switched from an open state to a closed state to achieve tissue sampling. The sampled tissue is clamped by the forceps head. At this time, a negative pressure device connected to the inner tube is used to generate a negative pressure in the lumen of the inner tube. The tissue clamped by the forceps head enters the inner tube and is output through the inner tube. The tissue in the inner tube is collected to complete a sampling, and then the above-mentioned tissue sampling operation is repeated. In this way, there is no need to remove the surgical instrument, and multiple tissue sampling can be performed, which reduces the difficulty of the operation, reduces the risk of the operation, shortens the operation time, and is flexible and convenient to operate.

[0022] It should be understood that the proximal end of the inner tube can also be connected to an injection device to achieve functions such as injection and flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic structural diagram of a continuous sampling surgical instrument according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the exploded structure of the continuous sampling surgical instrument according to an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a fixing head according to an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a clamp head according to an embodiment of the present invention;

[0028] Figure 5 It is a partial structural schematic diagram of a clamp head according to an embodiment of the present invention.

[0029] icon:

[0030] 100-clamp head; 110-mounting tube; 111-reducing section; 112-equal diameter section; 120-clamp arm; 130-notch; 131-bottom wall; 200-outer tube; 300-inner tube; 400-fixing head; 410-anti-slip convex part. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] At present, when using instruments for sampling, the instruments are used in conjunction with endoscopes. After the instruments are inserted into the patient's body to complete a sampling, the instruments need to be removed along the endoscope's clamp channel, and then the sample tissue is removed. When multiple samplings are required, the instrument needs to be inserted and removed repeatedly, which takes a long time, is difficult, has high risks, and is very inconvenient to operate.

[0038] See also Figure 1-Figure 5 ,In view of this, the designer designed a continuous sampling ,surgical instrument, which can achieve continuous sampling while the sampling ,instrument is always kept in the endoscope forceps channel, with low operation difficulty, short ,operation time, high efficiency, low risk, and inconvenient operation.

[0039] See also Figure 1 and Figure 2In this embodiment, the continuous sampling surgical instrument includes a clamp head 100, an outer tube 200 and an inner tube 300 that can be switched between an open state and a closed state. The clamp head 100 is slidably matched with the outer tube 200. The inner tube 300 is inserted into the outer tube 200 and is slidably matched with the outer tube 200 in the extension direction of the outer tube 200; one end of the inner tube 300 is connected to the clamp head 100, and the other end of the inner tube 300 is used to connect with a negative pressure device or an injection device, the negative pressure device is used to generate negative pressure in the lumen of the inner tube 300, so as to absorb the tissue sampled by the clamp head 100 from the clamp head 100 to the lumen of the inner tube 300; the injection device is used to inject liquid into the inner tube 300 to achieve functions such as injection flushing. The inner tube 300 is used to drive the clamp head 100 to move relative to the outer tube 200, so that the clamp head 100 switches between an open state and a closed state.

[0040] The continuous sampling surgical instrument provided in this embodiment is used in conjunction with an endoscope. During operation, the surgical instrument is inserted into the patient's body using the endoscopic forceps channel, the forceps head 100 is adjusted to an open state, and the tissue to be sampled is located in the area where the forceps head 100 can sample. Then, force is applied to the inner tube 300 to drive the inner tube 300 to slide relative to the outer tube 200 along the extension direction of the outer tube 200, and the inner tube 300 drives the forceps head 100 to move relative to the outer tube 200, so that the forceps head 100 is switched from an open state to a closed state to achieve tissue sampling. The sampled tissue is clamped by the forceps head 100. At this time, a negative pressure device connected to the inner tube 300 is used to generate a negative pressure in the lumen of the inner tube 300. The tissue clamped by the forceps head 100 enters the inner tube 300 and is output through the inner tube 300, and the tissue in the inner tube 300 is collected to complete a sampling, and then the above-mentioned tissue sampling operation is repeated. In this way, multiple tissue sampling can be performed without removing the surgical instruments, which reduces the difficulty of the operation, reduces the surgical risk, shortens the operation time, and makes the operation flexible and convenient.

[0041] In this embodiment, the outer tube 200 can be optionally configured as a spring tube, and the size of the outer tube 200 can be set as required, which is not specifically limited in this embodiment. The outer tube 200 can be a round tube with a smooth outer surface without corners, which is not easy to scratch tissue.

[0042] See also Figure 1 and Figure 3 Optionally, a fixed head 400 is provided at the distal end of the outer tube 200. The fixed head 400 is a round tube, and the hardness of the fixed head 400 is greater than the hardness of the outer tube 200. Compared with the outer tube 200, the fixed head 400 has high strength and high hardness and is not easy to deform.

[0043] The fixing head 400 can be inserted into the outer tube 200 and bonded and fixed to the outer tube 200. Alternatively, the fixing head 400 and the outer tube 200 are screwed and fixed, which are not listed one by one in this embodiment.

[0044] Furthermore, the inner wall of the fixing head 400 is provided with two anti-dropping protrusions 410 , and the two anti-dropping protrusions 410 are centrally symmetrically distributed. Each anti-dropping protrusion 410 protrudes inwardly from the inner wall of the fixing head 400 along the radial direction of the fixing head 400 .

[0045] Optionally, the inner tube 300 is configured as a spring tube, and the inner tube 300 is configured as a round tube. The inner tube 300 is inserted into the outer tube 200 and slidably cooperates with the outer tube 200 in the extension direction of the outer tube 200 .

[0046] See also Figure 4 In this embodiment, optionally, the clamp head 100 includes a mounting tube 110 and two clamp arms 120 , the two clamp arms 120 are both mounted at the distal end of the mounting tube 110 , and the two clamp arms 120 are arranged in a centrally symmetrical manner.

[0047] Optionally, the mounting tube 110 is configured as a round tube, and the proximal end of the mounting tube 110 is connected to the inner tube 300. It should be understood that the proximal end of the mounting tube 110 can be detachably connected to the inner tube 300. During assembly, the distal end of the inner tube 300 is inserted into the mounting tube 110.

[0048] See also Figure 5 Further, the lumen of the mounting tube 110 includes a coaxially arranged reducing section 111 and a constant diameter section 112, and the cross-sectional area of ​​the reducing section 111 gradually decreases in a direction from one end of the mounting tube 110 close to the clamp arm 120 to one end away from the clamp arm 120. That is, the cross-sectional area of ​​the reducing section 111 gradually decreases in a direction from the distal end to the proximal end of the mounting tube 110. In other words, since the cross section of the reducing section 111 is circular, the cross-sectional diameter of the reducing section 111 gradually decreases in a direction from the distal end to the proximal end of the mounting tube 110. The end of the reducing section 111 with a smaller diameter is fixedly connected to the constant diameter section 112. Both clamp arms 120 are fixed on an end face of the reducing section 111 away from the constant diameter section 112. The two clamp arms 120 and the mounting tube 110 form two notches 130 in the circumferential direction of the mounting tube 110 , and the bottom wall 131 of each notch 130 is a partial end surface of the mounting tube 110 . The bottom walls 131 of the two notches 130 are used to respectively abut against the two anti-slip protrusions 410 , thereby preventing the pliers head 100 from slipping out of the fixed head 400 .

[0049] Optionally, both clamp arms 120 are elastic arms, each clamp arm 120 is made of memory alloy, and the two clamp arms 120 are in an open state in the initial state. The clamp arms 120 can be deformed by external force, and can be restored to the initial open state after the external force is removed. That is to say, the clamp head 100 is installed in the fixed head 400. In the initial state, the two clamp arms 120 extend out of the distal end of the fixed head 400 and are in an open state. When force is applied to the inner tube 300 to drive the clamp head 100 to retract into the fixed head 400, the two clamp arms 120 are against the fixed head 400, and under the limiting effect of the fixed head 400, the two clamp arms 120 are closed and can clamp tissue. Due to the high strength of the fixed head 400, when the clamp arms 120 are retracted into the fixed head 400, the fixed head 400 can provide sufficient support force to ensure that the clamp arms 120 are closed smoothly and not easily deformed. The two clamp arms 120 have a high degree of closure, and it is more convenient to clamp tissue.

[0050] The continuous sampling surgical instrument provided in this embodiment, after the surgical instrument is placed into the patient's body with the endoscope, drives the inner tube 300, and the inner tube 300 drives the two clamp arms 120 in the open state to retract into the fixed head 400, and the two clamp arms 120 are switched from the open state to the closed state and the tissue is clamped. The removed tissue is clamped between the two clamp arms 120 and retracted into the fixed head 400 together. When repeated tissue sampling is required, a negative pressure device or an injection device is connected to the proximal end of the inner tube 300. After the negative pressure device or the injection device is started, a negative pressure is generated in the lumen of the inner tube 300, and the sample tissue between the two clamp arms 120 is adsorbed into the lumen of the inner tube 300 by the negative pressure, and finally discharged from the inner tube 300 for collection. There is no sample tissue in the clamp head 100, and the inner tube 300 is directly used to push the clamp head 100 out of the distal end of the fixed head 400, and the two clamp arms 120 are reset to the open state, and the sampling operation can be performed again, which is convenient and flexible to operate.

[0051] At the same time, during the tissue sample collection process, the tissue sample first enters the reducing section 111, which is roughly a conical cavity. The closer the sample tissue is to the end with a smaller diameter of the reducing section 111, the closer it is to the inner wall of the reducing section 111, and the less likely it is to leak, thereby facilitating the use of negative pressure to be adsorbed into the inner tube 300, thereby achieving high operating efficiency.

[0052] The continuous sampling surgical instrument provided in this embodiment does not need to be removed from the surgical instrument, and can perform repeated tissue sampling multiple times, thereby reducing surgical difficulty, reducing surgical risks, shortening surgical time, and being flexible and convenient to operate.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous sampling surgical instrument, characterized in that: include: A pliers head (100) having a switchable state between an open state and a closed state; an outer tube (200), the pliers head (100) being slidably matched with the outer tube (200); and an inner tube (300), the inner tube (300) being inserted into the outer tube (200) and slidably matched with the outer tube (200) in the extension direction of the outer tube (200); one end of the inner tube (300) being connected to the clamp head (100), and the other end of the inner tube (300) being used to be connected to a negative pressure device or an injection device, the negative pressure device being used to generate negative pressure in the lumen of the inner tube (300) so as to absorb the tissue sampled by the clamp head (100) from the clamp head (100) to the lumen of the inner tube (300); the inner tube (300) being used to drive the clamp head (100) to move relative to the outer tube (200) so as to switch the clamp head (100) between the open state and the closed state; The clamp head (100) comprises a mounting tube (110) and two clamp arms (120), wherein the two clamp arms (120) are both connected to the mounting tube (110), and the two clamp arms (120) can be switched between the open state and the closed state; the mounting tube (110) is slidably matched with the outer tube (200), and the mounting tube (110) is connected to the inner tube (300); The continuous sampling surgical instrument further comprises a fixed head (400), wherein the fixed head (400) is fixedly connected to the outer tube (200), and the clamp head (100) is inserted into the fixed head (400) and slidably cooperates with the fixed head (400); an anti-detachment convex portion (410) is provided on the fixed head (400), and the anti-detachment convex portion (410) is used to abut against the clamp head (100) to prevent the clamp head (100) from detaching from the fixed head (400) during the process of switching from the closed state to the open state; The lumen of the mounting tube (110) comprises a coaxially arranged reducing section (111) and a constant diameter section (112); the cross-sectional area of ​​the reducing section (111) gradually decreases in a direction from one end of the mounting tube (110) close to the clamp arm (120) to one end away from the clamp arm (120); the end of the reducing section (111) with a smaller diameter is fixedly connected to the constant diameter section (112); the two clamp arms (120) are both fixed on an end surface of the reducing section (111) away from the constant diameter section (112); and the two clamp arms (120) and the mounting tube (110) form two notches (130) in the circumferential direction of the mounting tube (110); the bottom wall 131 of each notch (130) is a partial end surface of the mounting tube (110); and the bottom walls (131) of the two notches (130) are used to respectively abut against the two anti-slip protrusions (410).

2. The continuous sampling surgical instrument according to claim 1, characterized in that: The inner tube (300) is inserted into the installation tube (110).

3. The continuous sampling surgical instrument according to claim 1, characterized in that: The clamp arms (120) are configured as elastic arms; when the inner tube (300) slides along a first direction, the two clamp arms (120) can abut against the inner wall of the outer tube (200) and retract into the outer tube (200), so that the two clamp arms (120) are switched from the open state to the closed state; and when the inner tube (300) slides along a second direction opposite to the first direction, the two clamp arms (120) can extend out of the outer tube (200) and restore the deformation, so that the two clamp arms (120) are switched from the closed state to the open state.

4. The continuous sampling surgical instrument according to claim 1, characterized in that: The lumen of the mounting tube (110) has a reducing section (111), the cross-sectional area of ​​the reducing section (111) gradually decreases in a direction from an end of the mounting tube (110) close to the clamp arm (120) to an end away from the clamp arm (120), and the inner tube (300) is connected to an end of the reducing section (111) away from the clamp arm (120), wherein the cross section is a plane perpendicular to the axis of the mounting tube (110).

5. The continuous sampling surgical instrument according to claim 4, characterized in that: The cross-sectional shape of the diameter-changing section (111) is circular or square.

6. The continuous sampling surgical instrument according to claim 1, characterized in that: The clamp head (100) is detachably connected to the inner tube (300).

7. The continuous sampling surgical instrument according to claim 1, characterized in that: The outer tube (200) and the inner tube (300) are both bendable tubes.

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