Sampling device and surgical instrument

Abstract

This invention provides a sampling device and surgical instrument, relating to the field of medical device technology. The invention includes a sampling tube with a closed distal end and a sampling port on the distal sidewall. The sampling port has a closed state and an open state. In the closed state, the sampling port is blocked by an insertion part; in the open state, the sampling port is unblocked by the insertion part and thus connected to the outside. A driving component is used to drive the distal end of the sampling tube to extend or retract into the insertion part, thereby switching the sampling port between the closed and open states. A suction component is configured to aspirate the sampling tube to a negative pressure state to aspirate the sample. Compared with existing technologies, this invention prevents non-target samples from entering the inlet of the connecting tube during the insertion of the endoscope into the gastrointestinal cavity, and prevents these non-target samples from being subsequently aspirated into the sample storage tank, thus avoiding contamination of the target sample. It also has the advantage of facilitating sequential sampling from multiple locations.

Description

Technical Field

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

[0002] The gastrointestinal tract is a key part of the human digestive system, including the stomach, small intestine and large intestine. These organs are responsible for digesting food and absorbing nutrients, and are therefore vital to maintaining human health. By monitoring the physiological environment in the gastrointestinal tract, doctors can detect and diagnose related diseases in a timely manner.

[0003] Endoscopes are often used to observe the inside of the gastrointestinal tract and obtain samples such as gastric juice through their grasping forceps, which are then analyzed with a microscope to help doctors assess the gastrointestinal health of patients. For example, in the related art of patent application publication number CN118121195A, during the insertion of the endoscope into the gastrointestinal tract, the insertion portion will pass through different body cavities, and the inlet position of the connecting tube will be directly exposed to the environment of different body cavities, and non-target samples will enter the inlet of the connecting tube. In the process of generating negative pressure in the sample storage tank to extract samples, non-target samples will be drawn into it, resulting in contamination of the target sample, thereby affecting subsequent test results. Summary of the invention

[0004] In order to solve the problem that non-target samples are sucked into the sample storage tank, resulting in contamination of the target sample, the present application provides a sampling device and a surgical instrument.

[0005] In a first aspect, the present application provides a sampling device, which adopts the following technical solution:

[0006] A sampling device, comprising: a sampling tube, wherein the distal end of the sampling tube is closed, and a sampling port is provided on the distal side wall of the sampling tube, wherein the sampling port has a closed state and an open state, wherein in the closed state, the sampling port is blocked by an insertion portion, and in the open state, the sampling port loses the blocking of the insertion portion and is thus connected to the outside;

[0007] A driving assembly, the driving assembly is connected to the sampling tube and is used to drive the distal end of the sampling tube to extend or retract into the insertion portion, so that the sampling port is switched between a closed state and an open state;

[0008] A suction component is connected to the sampling tube and is configured to suck the sampling tube to a negative pressure state to suck the sample.

[0009] Preferably, the sampling tube includes a front end tube and a liquid collection cylinder, the front end tube and the liquid collection cylinder are integrally connected, the diameter of the front end tube is smaller than the diameter of the liquid collection cylinder, the front end tube is located in the lens seat and the active bending section of the insertion part, and the liquid collection cylinder is located in the passive bending section of the insertion part.

[0010] Preferably, the driving assembly includes a front drive member, which is connected to the front end tube and is used to drive the front end tube to extend out of the insertion portion.

[0011] Preferably, the precursor has a peripheral wall covering the outer wall of the front end tube.

[0012] Preferably, the suction assembly includes a piston, which is slidably fitted in the fluid collection cylinder. The drive assembly also includes a pull rope, which is arranged on the piston and is used to pull the pull rope to make the piston slide relative to the fluid collection cylinder and form a negative pressure. The rear end of the fluid collection cylinder is integrally provided with a shrinking ring edge, and the inner ring of the shrinking ring edge is smaller than the size of the piston.

[0013] Preferably, there are multiple sampling tubes and they are arranged side by side at intervals, there is one pull rope, the head end of the pull rope extends out of the handle of the endoscope, the rope body of the pull rope is sequentially connected in series to the front drive member and the piston of each sampling tube, wherein the rope body of the pull rope enters the liquid collection tube along the rear end of the liquid collection tube and is slidably connected to the piston, and the tail end of the pull rope is fixedly connected to the inner wall of the insertion part;

[0014] A detachable connection point is provided between the rope body of the pull rope and the front drive member of each sampling tube. When the pull rope is pulled and reaches a preset breaking value, the detachable connection point breaks, causing the front end tube to extend out of the insertion portion.

[0015] A limit piece is provided at the rear end of the liquid collection tube, and the limit piece is used to lock the pull rope between the previous sampling tube and the next sampling tube in series;

[0016] An unlocking member is arranged at intervals near the rear end of the liquid collection tube in the insertion part. When the sampling of the previous sampling tube is completed, the unlocking member unlocks the pull rope between the previous sampling tube locked by the limiting member and the next sampling tube in series.

[0017] Preferably, the pull rope in the fluid collection cylinder is provided with redundant sections or is stretched straight.

[0018] Preferably, the limiting member comprises an annular plug, which is coaxially arranged inside the shrinking ring edge, and the annular plug fits snugly with the shrinking ring edge and abuts against a pull rope connecting the previous sampling tube in series to the next sampling tube.

[0019] Preferably, the driving assembly further comprises a locking rod, which is fixedly arranged in the insertion part, and the locking rods are arranged opposite to the annular plug and are spaced from each other. A hook is integrally arranged on the side of the locking rod facing the annular plug, and a bayonet is provided on the edge of the shrinking ring. When the sampling tube completes sampling and is driven to move backward by the piston pulled by the pull rope, the hook will be stuck in the bayonet and fix the position of the sampling tube;

[0020] And / or, the unlocking member comprises an unlocking push rod, the unlocking push rod is fixedly arranged in the insertion portion, the unlocking push rod is directly opposite to the annular plug and is arranged at a distance from each other;

[0021] And / or, a ring member is coaxially fixedly provided on the side of the piston facing the annular plug, and the projection of the annular plug along the piston direction is located inside the ring member.

[0022] In a second aspect, the present application provides a surgical instrument, which adopts the following technical solution:

[0023] A surgical instrument comprises the sampling device described in any one of the above technical solutions.

[0024] The present invention has the following advantages and beneficial effects:

[0025] (1) A sampling port is provided on the distal side wall of the sampling tube. When the insertion part is inserted into the position where sampling is required in the gastrointestinal cavity of the body, the driving component is used to drive the sampling tube to extend out of the insertion part, and the sampling port of the sampling tube is aligned with the sampling position in the body cavity. The sample is sucked by the suction component, thereby achieving accurate suction of the sample. In this way, the inlet position of the connecting tube is prevented from being directly exposed to the environment of different body cavities during the process of the insertion part entering the gastrointestinal cavity through different body cavities, which effectively prevents the sample from being contaminated. The overall design is simple, and the sampling tube is integrated and installed in the insertion part, which ensures the smoothness of the insertion part entering the body cavity and improves the performance of the insertion part.

[0026] (2) The sampling tube is divided into a front tube and a liquid collection tube, and the front tube is installed in the lens seat and the active bending section, and the liquid collection tube is installed in the passive bending section of the insertion part. At the same time, the diameter of the front tube is smaller than the diameter of the liquid collection tube, so that the bending performance of the active bending section will not be affected, and medical staff can better operate the insertion part. In addition, the front tube will not occupy too much space in the lens seat, and there will be more space in the lens seat to install other equipment;

[0027] (3) By setting a plurality of sampling tubes, multiple samplings can be performed at different positions of the gastrointestinal cavity, thereby improving the applicability of the sampling tubes. At the same time, by controlling a pull rope between the sampling tubes, sampling control of multiple sampling tubes can be achieved. After sampling, the sampling tubes can be retracted into the insertion part in time, ensuring that the samples are not contaminated, effectively saving costs, and facilitating the operation of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the endoscope.

[0030] Figure 2 It is a schematic diagram to show the structure of the active bending section, lens mount and sampling tube.

[0031] Figure 3 It is a structural schematic diagram intended to show the interior of the active bending section, the interior of the lens mount, and the sampling tube.

[0032] Figure 4 It is a schematic diagram intended to show the internal structure of the sampling tube.

[0033] Figure 5 yes Figure 4 Enlarged view of section A1.

[0034] Figure 6 yes Figure 4 Enlarged view of part B1.

[0035] Figure 7 It is a schematic diagram intended to show the internal structure of the sliding sleeve.

[0036] Figure 8 It is a schematic diagram for showing the structure of the shrink ring edge and the annular plug.

[0037] Fig. 9 It is a schematic diagram intended to show the structure of the front tube extending from the lens mount.

[0038] Fig.10 It is a schematic diagram for showing the structure of the sampling port of the front end tube.

[0039] Fig.11 It is a schematic diagram intended to show the structure of the piston, ring and fixed pulley.

[0040] The markings in the figure are:

[0041] 1. Sampling tube; 11. Front end tube; 111. Sampling port; 12. Liquid collection tube; 121. Shrinking ring edge; 1211. Bayonet;

[0042] 2. driving assembly; 21. front driving member; 211. tension spring; 22. locking rod; 221. hook claw;

[0043] 3. Suction assembly; 31. Piston; 311. Ring member; 312. Mounting plate; 313. Fixed pulley; 32. Pull rope; 321. Redundant section;

[0044] 4. Separable connection points;

[0045] 5. Limiting member; 51. Annular plug;

[0046] 6. Unlocking piece; 61. Unlocking ejector rod;

[0047] 7. sliding sleeve; 71. avoidance notch; 72. rod body;

[0048] 8. Endoscope; 810. Handle; 81. Insertion portion; 811. Lens holder; 8111. Accommodation slot; 812. Active bending section; 813. Passive bending section; 82. Operating lever;

[0049] A. The extension direction of the front end tube; B. The retraction direction of the front end tube; C. The pulling direction of the pull rope; D. The folded section of the pull rope. DETAILED DESCRIPTION

[0050] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0051] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0052] In order to facilitate understanding of a sampling device provided in an embodiment of the present application, the relevant technology is first introduced below in conjunction with application scenarios.

[0053] It should be noted that the surgical instruments in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose any specific restrictions on the type of endoscope.

[0054] The insertion portion 81 may be configured as the insertion portion 81 of the above-mentioned surgical instrument. In this embodiment, the endoscope 8 is described.

[0055] During the process of inserting the endoscope 8 into the gastrointestinal tract, the insertion portion 81 will pass through different body cavities, and the inlet of the connecting tube will be directly exposed to the environment of different body cavities. Non-target samples will enter the inlet of the connecting tube, and in the process of forming negative pressure in the sample storage tank and extracting samples, non-target samples will be drawn into it, resulting in contamination of the target sample, thereby affecting the subsequent test results.

[0056] In view of the above problems, the embodiment of the present application provides a sampling device, see Figure 1-Figure 11 As shown, there are two sampling tubes 1, which are installed side by side and at intervals at the front end of the insertion part 81. It is worth noting that the number of sampling tubes 1 can be multiple, without specific limitation, and depends on specific usage requirements. The sampling tubes 1 are made of plastics such as polypropylene or polycarbonate. Such plastic materials meet the safety standards of the medical industry, can withstand the pressure during the sample absorption process and avoid affecting the sample. At the same time, such plastics have a certain deformation ability. When the insertion part 81 of the endoscope 8 is bent according to requirements, the sampling tube 1 will bend accordingly, so that the normal bending of the insertion part 81 of the endoscope 8 will not be affected.

[0057] The distal end of the sampling tube 1 is closed, and the sampling tube 1 and the lens seat 811 are slidably and tightly matched to prevent contaminants from entering the insertion portion 81 of the endoscope 8 from the gap between the sampling tube 1 and the lens seat 811, causing contamination of the insertion portion 81. The distal side wall of the sampling tube 1 is provided with a sampling port 111, which can be expanded when opened to facilitate sample entry. There is no specific limitation on the shape of the sampling port 111, and of course the number is at least one. The sampling port 111 can be evenly opened along the peripheral wall of the sampling tube 1, or unevenly opened along the peripheral wall of the sampling tube 1. According to the usage scenario, the opening direction of the sampling port 111 is preferably toward the lens direction of the lens seat 811 of the insertion portion 81. During the operation of medical staff, the sampling port 111 can achieve accurate sampling according to the sample image transmitted by the lens.

[0058] In other implementations, a one-way valve may be installed at the sampling port 111 so that the sample can only enter in one direction, thereby further protecting the sample from contamination.

[0059] Of course, it is particularly noted that, in order to protect the sample from being contaminated, the sampling port 111 has a closed state and an open state. In the closed state, the sampling port 111 is blocked by the insertion portion 81. Specifically, the sampling port 111 of the sampling tube 1 is retracted into the lens holder 811 of the endoscope 8 and is not connected to the sampling tube 1, resulting in being blocked. In the open state, the sampling port 111 loses the blocking of the insertion portion 81 and is connected to the outside. Specifically, the sampling port 111 of the sampling tube 1 extends out of the lens holder 811 of the endoscope 8 and is connected to the inside of the sampling tube 1. This setting is very simple and practical.

[0060] like Figure 2 and Figure 3 As shown, the sampling tube 1 is divided into a front end tube 11 and a liquid collection tube 12, and the front end tube 11 and the liquid collection tube 12 are connected and arranged in an integral manner. During the manufacturing process, an injection mold can be used to manufacture the sampling tube 1 in an integral manner, wherein the diameter of the front end tube 11 is smaller than the diameter of the liquid collection tube 12, and the inner wall thickness of the front end tube 11 and the liquid collection tube 12 is the same. The front end tube 11 is located in the lens seat 811 and the active bending section 812 of the insertion portion 81, and the liquid collection tube 12 is located in the passive bending section 813 of the insertion portion 81, and the sampling tube 1 is divided into the front end tube 11 and the liquid collection tube 12, and the front end tube 1 1 is installed in the lens seat 811 and the active bending section 812, and the liquid collection cylinder 12 is installed in the passive bending section 813 of the insertion part 81. At the same time, the diameter of the front end tube 11 is smaller than the diameter of the liquid collection cylinder 12, so that the bending performance of the active bending section 812 will not be affected, and the medical staff can better operate the insertion part 81. In addition, the front end tube 11 will not occupy too much position of the lens seat 811, and there will be more space for installing other equipment in the lens seat 811. Due to the larger diameter of the liquid collection cylinder 12, the liquid collection cylinder 12 can have more space to accommodate samples.

[0061] In another preferred embodiment, the cross-section of the fluid collection tube 12 along the radial direction of the insertion portion 81 of the endoscope 8 can be a fan-shaped surface, which can better match and fit the circular instrument tube of the endoscope 8 and at the same time have a larger space for accommodating samples.

[0062] In addition, a sliding sleeve 7 is correspondingly installed on the liquid collection tube 12 of each sampling tube 1, and the sliding sleeve 7 is fixedly connected to the inner wall of the outer shell of the passive bending section 813 of the endoscope 8. The liquid collection tube 12 is slidably connected in the sliding sleeve 7. An avoidance slot 71 for the pull rope 32 to pass through is opened on the sliding sleeve 7. The avoidance slot 71 is long and strip-shaped along the axial direction of the sampling tube 1. The sliding sleeve 7 can guide the liquid collection tube 12 of the sampling tube 1. The shape of the sliding sleeve 7 is cylindrical, which can ensure that the liquid collection tube 12 can slide normally. Due to the existence of the avoidance slot 71, when the pull rope 32 is pulled, the avoidance slot 71 can play an avoidance role to prevent the pull rope 32 from being interfered by the liquid collection tube 12 and the sliding sleeve 7, thereby ensuring that the pull rope 32 can be pulled normally. In other implementations, the sliding sleeve 7 does not need to be an annular sleeve as a whole, and can be a plurality of splints, which clamp the sliding sleeve 7 to guide the sampling tube 1.

[0063] like Figure 3 As shown, the driving assembly 2 is connected to the sampling tube 1, and is used to drive the distal end of the sampling tube 1 to extend or retract into the insertion portion 81, so that the sampling port 111 is switched between a closed state and an open state. Specifically, the driving assembly 2 includes a front drive 21, which is connected to the front end tube 11 and is used to drive the front end tube 11 to extend out of the insertion portion 81;

[0064] The front drive member 21 has a peripheral wall covering the outer wall of the front end tube 11. In this embodiment, the front drive member 21 is a tension spring 211. When installed, the tension spring 211 needs to be sleeved on the front end tube 11 to pull the front end tube 11 of the sampling tube 1 out of the insertion portion 81. The tension spring 211 sleeved on the front end tube 11 can protect the front end tube 11. More importantly, the tension spring 211 is installed at the front end of the sampling tube 1. The tension of the tension spring 211 will act on the front of the sampling tube 1. Since the sampling tube 1 is not fully rigid and has a thin overall diameter, the front end tube 11 of the sampling tube 1 can be pulled out better, and a thrust is applied from the rear end of the sampling tube 1. , which can easily cause the front end tube 11 of the sampling tube 1 to be bent, affecting the normal extension of the front end tube 11 of the sampling tube 1. It should be noted that a receiving groove 8111 is provided on the lens holder 811 for accommodating the tension spring 211. One end of the tension spring 211 is fixedly connected to the bottom wall of the receiving groove 8111 on the lens holder 811, and the other end of the tension spring 211 is fixedly installed on the front end tube 11. When the two ends of the tension spring 211 are specifically installed and fixed, they can be bonded with strong glue or riveted, and a part of the tension spring 211 is installed in the receiving groove 8111, which can reduce the influence of the elastic force of the deformation of the tension spring 211 on the bending of the active bending section 812.

[0065] In another embodiment, the precursor component 21 can be a rubber sleeve or other elastic structure. At the same time, the precursor component 21 such as the tension spring 211 does not need to be mounted on the front end tube 11, but can be installed on the outer peripheral side of the front end tube 11 to play a precursor role on the sampling tube 1.

[0066] At the same time, in other preferred embodiments, the driving component 2 can also use a traction rope, connect the pulling end of the traction rope to the front end of the front end tube 11, and use the guide wheel to reverse the traction rope to achieve the purpose of pulling the front end tube 11 out of the lens mount 811.

[0067] like Figure 4 and Figure 5 As shown, it is worth pointing out that the suction assembly 3 is connected to the sampling tube 1, and the suction assembly 3 is configured to suck the sampling tube 1 to a negative pressure state to suck the sample. Specifically, the suction assembly 3 has a piston 31, and the piston 31 is slidably fitted in the liquid collection tube 12. The driving assembly 2 has a pull rope 32, and the rope body of the pull rope 32 is installed on the piston 31, wherein the side of the piston 31 close to the rear end of the liquid collection tube 12 is fixedly connected to a fixed pulley 313 through a mounting plate 312, and the stretched rope body is wound around the fixed pulley 313. The mounting plate 312 can play a limiting role to prevent the pull rope 32 from falling off the fixed pulley 313. When the medical staff pulls the pull rope 32, the piston 31 can slide relative to the liquid collection tube 12 and form a negative pressure. In other implementations, a through hole can be opened in the piston 31, and the pull rope 32 can directly pass through the through hole of the piston 31 to pull the piston 31, and the pull rope 32 can also slide;

[0068] In other preferred embodiments, the suction component 3 may use a negative pressure pump, which is connected to a pipeline, and the pipeline is further connected to the sampling tube 1 to achieve a negative pressure state in the sampling tube 1 and extract the sample;

[0069] Furthermore, the rear end of the liquid collection tube 12 is integrally provided with a shrinking ring rim 121, and the inner ring of the shrinking ring rim 121 is smaller than the size of the piston 31. The shrinking ring rim 121 can effectively prevent the piston 31 from falling off and play a role of limiting. When the piston 31 is pulled, after the piston 31 moves to abut the shrinking ring rim 121, the sampling tube 1 can be pulled back into the insertion part 81 of the endoscope 8. Of course, in order to facilitate the installation of the piston 31, the shrinking ring rim 121 can be threadedly connected to the rear end of the liquid collection tube 12 to facilitate disassembly and assembly. However, since the piston 31 is made of rubber material, the piston 31 can also be installed in the liquid collection tube 12 through extrusion and deformation.

[0070] like Figure 4 and Figure 5As shown, in order to achieve multiple sampling of different positions of the gastrointestinal cavity and improve the applicability of the sampling tube 1, while saving costs and facilitating the operation of medical staff, the number of pull ropes 32 is installed, the head end of the pull rope 32 extends out of the handle 810 of the endoscope 8, and the rope body of the pull rope 32 is sequentially connected in series to the tension spring 211 and the piston 31 of each sampling tube 1, wherein the rope body of the pull rope 32 enters the liquid collection tube 12 along the rear end of the liquid collection tube 12 and is slidably connected to the piston 31, and the tail end of the pull rope 32 is glued or riveted to the inner wall of the passive bending section 813 of the endoscope 8;

[0071] In order to facilitate the operation of the pull rope 32, an operating rod 82 for operating the pull rope 32 is installed on the handle 810 shell of the endoscope 8, and the operating rod 82 is connected to the end of the pull rope 32 extending outside the handle 810 of the endoscope 8. By pulling the operating rod 82, the pull rope 32 can be pulled to move, so that the detachable connection point 4 between the pull rope 32 and the tension spring 211 reaches a preset breaking value and breaks. The overall operation is simple and convenient. Of course, a sliding part can also be installed on the handle 810 shell of the endoscope 8, and the pull rope 32 can be fixedly or detachably installed on the sliding part. Medical staff can pull the pull rope 32 by toggling the sliding part.

[0072] A detachable connection point 4 is provided between the rope body of the pull rope 32 and the tension spring 211 of each sampling tube 1. When the pull rope 32 is pulled and reaches a preset breaking value, the detachable connection point 4 breaks and the front end tube 11 extends out of the insertion portion 81. The detachable connection point 4 can be bonded with strong glue or tied with a plastic rope or rubber ring. The breaking value of a single plastic rope or rubber ring can be measured by experiment, and the preset breaking value of the detachable connection point 4 can be determined by the number of turns of the plastic rope or rubber ring actually wound around.

[0073] Of course, in order to prevent the front end tube 11 from extending too long after the detachable connection point 4 between the tension spring 211 and the pull rope 32 breaks, the folded section of the pull rope 32 can be configured to be shorter, and then one end of a rope or other connecting rod can be connected to the folded section of the pull rope 32, and the other end can be connected to the detachable connection point 4 of the tension spring 211. Similarly, the liquid collection cylinder 12 at the rear end of the sampling tube 1 can also be made shorter.

[0074] In order to prevent the liquid collection tube 12 at the rear end of the sampling tube 1 from being pulled into the active bending section 812 under the action of the tension spring 211 and affecting the bending of the active bending section 812, in a preferred embodiment, the connection between the liquid collection tube 12 at the rear end of the sampling tube 1 and the front end tube 11 has a certain gap from the active bending section 812 to ensure that the liquid collection tube 12 at the rear end of the sampling tube 1 will not enter the active bending section 812 after extending forward.

[0075] like Figure 6 and Figure 7As shown, a limiting member 5 is installed at the rear end of the liquid collection tube 12, and the limiting member 5 is used to lock the pull rope 32 between the previous sampling tube 1 and the next sampling tube 1 in series;

[0076] It should be understood that the stopper 5 is mainly used to prevent the pull rope 32 between the previous sampling tube 1 and the next sampling tube 1 from being pulled when the pull rope 32 of the previous sampling tube 1 is pulled, thereby unlocking the next sampling tube 1 and extending it out of the insertion portion 81, thereby losing the purpose of sampling one position at a time as required;

[0077] Among them, the limiting member 5 uses an annular plug 51, which is made of rubber. The shape of the annular plug 51 can be round, square or other shapes. The annular plug 51 is coaxially installed in the shrinking ring edge 121. The annular plug 51 cooperates with the shrinking ring edge 121 and abuts against the pull rope 32 between the previous sampling tube 1 and the next sampling tube 1 in series. There is a hole in the middle of the annular plug 51, and the pull rope 32 passes through the hole in the middle of the annular plug 51, which facilitates the installation of the pull rope 32.

[0078] As an optional embodiment, the limiter 5 can directly use a spring clip, which is installed in the shrinking ring edge 121, and the elastic force of the spring clip is used to abut against the pull rope 32, so as to limit the pull rope 32 between the previous sampling tube 1 and the next sampling tube 1, thereby preventing the detachable connection point 4 of the next sampling tube 1 from reaching the preset breaking value and breaking when the previous sampling tube 1 is not completed, thereby losing the purpose of separate sampling.

[0079] An unlocking member 6 is installed at intervals in the insertion portion 81 near the rear end of the liquid collection tube 12. When the sampling of the previous sampling tube 1 is completed, the unlocking member 6 unlocks the pull rope 32 between the previous sampling tube 1 locked by the limiting member 5 and the next sampling tube 1 in series.

[0080] The unlocking member 6 is provided to unlock the drawstring 32 connecting the previous sampling tube 1 to the next sampling tube 1 after the previous sampling tube 1 has finished sampling, thereby realizing linkage and ensuring that after the previous sampling tube 1 has finished sampling, the next sampling tube 1 can also sample normally.

[0081] like Figure 4 and Figure 5As shown, the pull rope 32 in the liquid collection tube 12 may have a redundant section 321 or be stretched straight. It should be understood that after the pull rope 32 in the liquid collection tube 12 has the redundant section 321, when the medical staff pulls the pull rope 32 and the detachable connection point 4 between the pull rope 32 and the tension spring 211 reaches the preset breaking value and breaks, due to the existence of the redundant section 321, the front end tube 11 of the sampling tube 1 can extend a longer distance outside the lens seat 811. After the front end tube 11 has the distance of the redundant section 321, the front end tube 11 of the sampling tube 1 can increase the sampling range without moving the insertion distance of the insertion part 81 of the endoscope 8, so as to avoid causing physical discomfort to the patient when moving the insertion part 81 of the endoscope 8, thereby improving the scope of use;

[0082] When there is no redundant section 321 in a stretched state, when the medical staff pulls the pull rope 32 and the detachable connection point 4 between the pull rope 32 and the tension spring 211 reaches the preset breaking value and breaks, the initial forward distance of the sampling tube 1 is the folded section of the pull rope 32 between the rear end of the fluid collection tube 12 and the detachable connection point 4, and the overall stroke is the preset stroke of the folded section of the pull rope 32.

[0083] like Figure 6 and Figure 7 As shown, the driving assembly 2 also includes a locking rod 22. To facilitate the installation of the locking rod 22, the end of the sliding sleeve 7 away from the lens holder 811 is closed or semi-closed. The locking rod 22 is integrally formed at the closed end position of the rear end of the sliding sleeve 7. The sliding sleeve 7 is fixed to the inner wall of the passive bending section 813 through the rod body 72. Specifically, the rod body 72 can be fixed to the inner wall of the passive bending section 813 by welding or strong glue bonding. The locking rod 22 is directly opposite to the annular plug 51 and is spaced from each other. The locking rod 22 is integrally formed with a hook claw 221 on the side facing the annular plug 51. A bayonet 1211 is provided on the edge 121, and the cross section of the hook 221 is a triangle, and the long side of the triangle is a guide surface, which faces the side of the bayonet 1211. The long side guide surface can play a guiding role when contacting the shrinking ring edge 121. The locking rod 22 is inserted into the shrinking ring edge 121. The hook 221 and the locking rod 22 can be directly injection molded using an injection mold. The shape of the bayonet 1211 is the same as that of the hook 221. When the sampling tube 1 completes sampling and is driven to move backward by the pull rope 32 pulling the piston 31, the hook 221 will be stuck in the bayonet 1211 and fix the position of the sampling tube 1;

[0084] It should be understood that the locking rod 22 can also play a role in pushing open the annular plug 51 to a certain extent, thereby loosening the drawstring 32 between the previous sampling tube 1 and the next sampling tube 1 in series, and playing a role in unlocking. In other embodiments, in order to fix the position of the sampling tube 1 after the sampling tube 1 completes sampling, a first magnetic member can be fixedly bonded or detachably connected to the rear end of the sampling tube 1, and a second magnetic member can be installed at a position spaced from the rear end of the sampling tube 1 on the inner wall of the passive bending section 813 or the rear end of the sliding sleeve 7, and the first magnetic member and the second magnetic member are attracted to each other to achieve the fixation of the sampling tube 1;

[0085] Furthermore, in order to facilitate the opening of the annular plug 51 and improve the stability of the annular plug 51 when being opened, the unlocking member 6 is an unlocking push rod 61, which is opposite to the annular plug 51 and is spaced apart from each other. The unlocking push rod 61 can be round, square or other shapes. The length of the unlocking push rod 61 is greater than or equal to the length of the shrinking ring edge 121 to ensure that the annular plug 51 can be normally pushed out and the pull rope 32 between the previous sampling tube 1 and the next sampling tube 1 can be unlocked. In order to facilitate the installation of the unlocking push rod 61, the unlocking push rod 61 is integrally formed at the closed end position of the rear end of the sliding sleeve 7, and the whole can be completed by injection molding by an injection molding machine, so that the unlocking push rod 61 can play a role in smoothly opening the annular plug 51. After the sliding sleeve 7 is installed, the purpose of installing the unlocking push rod 61 and the locking rod 22 is achieved, which is convenient for the staff to install;

[0086] At the same time, an annular member 311 is coaxially fixedly installed on one side of the piston 31 facing the annular plug 51. The projection of the annular plug 51 along the direction of the piston 31 is located inside the annular member 311. The inner diameter of the annular plug 51 is larger than the inner diameter of the shrinking ring edge 121. The annular member 311 can be made of rubber. In a preferred embodiment, the annular member 311 and the piston 31 are formed in one piece and are injection molded by an injection molding machine. It is worth noting that the main purpose of the annular member 311 is to accommodate the annular member 311 after the annular plug 51 is pushed out of the shrinking ring edge 121, so as to avoid the annular plug 51 abutting against the piston 31 and being unable to be unlocked. Since the annular member 311 and the piston 31 are formed in one piece, the length of the piston 31 can be increased, and the piston 31 can be improved when the piston 31 is pulled. The stability of the piston 31 is very good;

[0087] Finally, after the sampling is completed, the insertion part 81 of the endoscope 8 is removed from the gastrointestinal cavity, and the medical staff inserts the needle of the syringe into the front end tube 11 of the sampling tube 1, and pulls the syringe to suck out the sample in the sampling tube 1 for testing, which effectively avoids the contamination of the sample. Hiding the sampling tube 1 in the insertion part 81 of the endoscope 8 can facilitate the normal insertion of the insertion part 81 of the endoscope 8 into the human cavity and reduce the patient's physical discomfort. It should be noted that the sampling tube 1 is a disposable product in this embodiment, and the active bending section 812 and the passive bending section 813 need to be disassembled and replaced after use.

[0088] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sampling device, used in endoscopes, It is characterized in that include: A sampling tube (1), wherein the distal end of the sampling tube (1) is closed, the sampling tube (1) is slidably inserted into a lens seat (811) at the front end of the insertion portion (81), a sampling port (111) is provided on the distal side wall of the sampling tube (1), and the sampling port (111) has a closed state and an open state. In the closed state, the sampling port (111) is blocked by the insertion portion (81), and in the open state, the sampling port (111) is no longer blocked by the insertion portion (81) and is thus connected to the outside. a drive assembly (2), the drive assembly (2) being connected to the sampling tube (1) and being used for driving the distal end of the sampling tube (1) to extend or retract into the insertion portion (81), so that the sampling port (111) is switched between a closed state and an open state; A suction component (3), the suction component (3) is connected to the sampling tube (1), and the suction component (3) is configured to suck the sampling tube (1) to a negative pressure state to suck the sample; The sampling tube (1) comprises a front end tube (11) and a liquid collection tube (12); the front end tube (11) and the liquid collection tube (12) are arranged in an integral manner; the diameter of the front end tube (11) is smaller than the diameter of the liquid collection tube (12); the front end tube (11) is located in a lens seat (811) and an active bending section (812) of the insertion part (81); and the liquid collection tube (12) is located in a passive bending section (813) of the insertion part (81).

2. The sampling device according to claim 1, It is characterized in that The driving assembly (2) comprises a front driving component (21), the front driving component (21) is connected to the front end tube (11), and is used to drive the front end tube (11) to extend out of the insertion portion (81).

3. The sampling device according to claim 2, It is characterized in that The front drive component (21) has a peripheral wall covering the outer wall of the front end tube (11).

4. The sampling device according to claim 2, It is characterized in that The suction assembly (3) includes a piston (31), and the piston (31) is slidably fitted in the liquid collection cylinder (12). The driving assembly (2) also includes a pull rope (32), and the pull rope (32) is arranged on the piston (31). The pull rope (32) is used to pull the pull rope (32) to make the piston (31) slide relative to the liquid collection cylinder (12) and form a negative pressure. The rear end of the liquid collection cylinder (12) is integrally provided with a shrinking ring edge (121), and the inner ring of the shrinking ring edge (121) is smaller than the size of the piston (31).

5. The sampling device according to claim 4, It is characterized in that There are multiple sampling tubes (1) arranged side by side at intervals, there is only one pull rope (32), the head end of the pull rope (32) extends out of the handle (810) of the endoscope (8), the rope body of the pull rope (32) is sequentially connected in series to the front drive (21) and the piston (31) of each sampling tube (1), wherein the rope body of the pull rope (32) enters the liquid collection tube (12) along the rear end of the liquid collection tube (12) and is slidably connected to the piston (31), and the tail end of the pull rope (32) is fixedly connected to the inner wall of the insertion part (81); A detachable connection point (4) is provided between the rope body of the pull rope (32) and the front drive member (21) of each sampling tube (1). When the pull rope (32) is pulled and reaches a preset breaking value, the detachable connection point (4) breaks, allowing the front end tube (11) to extend out of the insertion portion (81); A limiting member (5) is provided at the rear end of the liquid collection tube (12), and the limiting member (5) is used to lock a pull rope (32) between a previous sampling tube (1) and a next sampling tube (1) connected in series; An unlocking member (6) is arranged at intervals near the rear end of the liquid collection tube (12) at the insertion portion (81); when the sampling of the previous sampling tube (1) is completed, the unlocking member (6) unlocks the pull rope (32) between the previous sampling tube (1) locked by the limiting member (5) and the next sampling tube (1) connected in series.

6. The sampling device according to claim 5, It is characterized in that The pull rope (32) in the liquid collection cylinder (12) is provided with a redundant section (321) or is arranged to be stretched straight.

7. The sampling device according to claim 5 or 6, It is characterized in that The limiting member (5) comprises an annular plug (51), which is coaxially arranged inside the shrinking ring edge (121). The annular plug (51) fits snugly with the shrinking ring edge (121) and abuts against a pull rope (32) connecting the previous sampling tube (1) in series to the next sampling tube (1).

8. The sampling device according to claim 7, It is characterized in that The driving assembly (2) further comprises a locking rod (22), wherein the locking rod (22) is fixedly arranged in the insertion portion (81), the locking rod (22) is directly opposite to the annular plug (51) and is arranged at a distance from each other, a hook (221) is integrally arranged on the side of the locking rod (22) facing the annular plug (51), a bayonet (1211) is provided on the edge of the shrink ring (121), and when the sampling tube (1) completes sampling and is driven to move backward by the pull rope (32) pulling the piston (31), the hook (221) will be clamped into the bayonet (1211) and fix the position of the sampling tube (1); And / or, the unlocking member (6) comprises an unlocking push rod (61), the unlocking push rod (61) is fixedly arranged in the insertion portion (81), and the unlocking push rod (61) is directly opposite to the annular plug (51) and is arranged at a distance from each other; And / or, an annular member (311) is coaxially fixedly arranged on one side of the piston (31) facing the annular plug (51), and a projection of the annular plug (51) along the direction of the piston (31) is located inside the annular member (311).

9. A surgical instrument, It is characterized in that A sampling device comprising any one of claims 1 to 8.

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