Medical endoscope with bent top section
By designing a movable working channel tube and an eccentric expansion endoscopic top section capsule in a medical endoscope, the problem that the endoscope is difficult to reach in difficult corners is solved, a wider range of motion and higher bending adjustment accuracy is achieved, and the flexibility and effectiveness of the surgery are improved.
Patent Information
- Application Number
- CN202421310646.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-08
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-08
AI Technical Summary
Existing medical endoscopes are difficult to reach when entering certain difficult corners, especially when the angle of the subrenal calyx is too small, and the endoscope apex cannot enter or encounter difficulties when the subrenal calyx moves.
A top-segment curved medical endoscope is designed, which includes a movable working channel tube and an endoscopic top-segment capsule having eccentric expansion capability. With these designs, the bending radius at the endoscope apex can be minimized, allowing it to more easily enter difficult corners that cannot be achieved in conventional endoscopes.
A wider range of motion at the endoscopic apex and higher bending adjustment accuracy are achieved, allowing it to be more easily accessible and operated in areas that cannot be reached by traditional endoscopy, improving the flexibility and effectiveness of the surgery.
Smart Images
Figure CN222657017U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a top-section curved medical endoscope, belonging to the technical field of medical equipment products. Background Art
[0002] Existing medical endoscopes are used to enter the natural cavity, third space or pathological sinus of a living body to perform operations such as biopsy, tissue ablation, electroresection, laser lithotripsy, etc. The endoscope is usually provided with a bending structure to allow the tip of the endoscope to bend and change within a certain angle. When the lesion is located in a difficult corner that cannot be reached within the bending radius of the endoscope, that is, a position that the tip of the endoscope cannot reach, such as when the renal pelvic infundibulum angle IPA is too small, the tip of the endoscope cannot enter the subrenal calyx, and the operation is difficult to perform; even if it barely touches the neck of the subrenal calyx, the tip of the endoscope is difficult to move in the subrenal calyx, and further operations cannot be completed. Summary of the invention
[0003] The utility model provides a top-section curved medical endoscope, with a unique endoscope top section and an eccentrically expanded capsule design, which minimizes the bending radius of the endoscope head area during use, making it easy for the endoscope tip to reach and enter difficult corners that traditional endoscopes cannot enter.
[0004] The purpose of the utility model is achieved in this way:
[0005] The top-segment bending type medical endoscope comprises a slender main endoscope tube, the inner cavity of the main endoscope tube is provided with a working channel tube running through the head and tail, the inner cavity of the working channel tube constitutes a working channel, the working channel is provided with an inner opening of the working channel entering the body when in use and an outer opening of the working channel outside the body, the easily bendable working channel tube is movably sleeved in the inner cavity of the main endoscope tube, the working channel tube can at least move axially in the inner cavity of the main endoscope tube, and also comprises an endoscope top segment separated from the main endoscope tube, the endoscope top segment is indirectly connected to the head of the main endoscope tube, and the bottom end of the endoscope top segment is connected to the endoscope The distance between the top ends of the endoscope main catheter heads is changed by moving the working channel tube and / or the middle part; the peeping component is arranged at the leading end of the endoscope top segment and / or the leading end of the working channel tube; the outer surface of the endoscope top segment is covered with at least one endoscope top segment balloon that can be eccentrically expanded, and the endoscope top segment balloon is composed of an endoscope top segment balloon connecting part and an endoscope top segment balloon free part, the endoscope top segment balloon connecting part is in sealing contact with the outer surface of the endoscope top segment, and the external fluid is filled into the inner cavity of the endoscope top segment balloon through the endoscope top segment balloon passage, causing the endoscope top segment balloon free part to eccentrically expand and deform.
[0006] The top section bending refers to the bending displacement of the endoscope top section relative to the endoscope main catheter, that is, when the main catheter is placed vertically, the endoscope top section can bend to one side under the action of external force; the endoscope top section is indirectly connected to the endoscope main catheter head, including two situations, one is: the endoscope top section is connected to the endoscope main catheter head through the middle part; the second is: the endoscope top section is connected to the endoscope main catheter head through the working channel tube, when the peeping component is arranged at the front end of the endoscope top section, the electronic wire group of the peeping component is arranged in the tube wall of the working channel tube, in this case, the middle part can be omitted.
[0007] The eccentric expansion of the free part of the endoscope top segment sac includes two situations. First, in a non-bending state, the free part of the endoscope top segment sac expands on one side of the central axis of the endoscope main catheter. Second, in a non-bending state, the free part of the endoscope top segment sac expands circumferentially around the central axis of the endoscope main catheter, but it is an asymmetric circumferential expansion, and the degree of expansion on at least one side is different. When the expansion of one side is restricted, the endoscope top segment will be pressed to the opposite side, thereby causing a bending displacement of the endoscope top segment relative to the endoscope main catheter.
[0008] The middle part mainly serves as a link. One end of the middle part is connected to the head of the endoscope main catheter, and the other end is connected to the top section of the endoscope. It plays the role of fluid transportation, electronic wire group accommodation and tethering. The middle part can be deformed over a certain distance without affecting its fluid transportation, electronic wire group accommodation and tethering functions. The tethering function refers to tethering the top section of the endoscope to the head of the endoscope main catheter through the middle part.
[0009] In order to enhance the negative pressure suction capability, the device also includes a hollow protrusion extending forward from the tip of the top section of the endoscope. The protrusion is cylindrical and consists of a protrusion head, a protrusion middle portion, and a protrusion connecting portion. The protrusion connecting portion circumferentially covers the area below the tip of the top section of the endoscope, and the opening area on the protrusion is larger than the opening area in the working channel.
[0010] When the top section of the endoscope is connected to the head of the main catheter of the endoscope through the middle part, the middle part can be any one or more of a threaded tube, a coated threaded tube, a corrugated tube, an easily stretchable band, and a curved line.
[0011] One structure is that the working channel tube head section is connected to the endoscope top section as a whole, the front end of the working channel tube is located in the front end area of the endoscope top section, the two tips are flush or close, and the endoscope top section is in any one of a sleeve shape, a tile shape, and a C-shaped arc sheet with a horizontal cross-section.
[0012] Another structure is that the top section of the endoscope is in the shape of a sleeve, the working channel tube head section is movably sleeved in the top section of the endoscope, the distal end of the middle section is connected to the top section of the endoscope, and the proximal end of the middle section is connected to the endoscope main tube head and / or the working channel tube body section.
[0013] Another structure is that the top section of the endoscope is in the shape of a sleeve, and the sleeve-shaped top section balloon of the endoscope is sleeved outside the top section of the endoscope, and the free part of the top section balloon of the endoscope is located on one side or the free part of the top section balloon of the endoscope is arranged circumferentially but the wall thickness of the free part of the top section balloon of the endoscope is uneven to facilitate eccentric expansion.
[0014] A multi-balloon solution is that the top section of the endoscope is in the shape of a sleeve, and an endoscope top section balloon is arranged on both sides of the endoscope top section respectively. The first balloon of the endoscope top section and the second balloon of the endoscope top section are connected to the external fluid through the first balloon passage of the endoscope top section and the second balloon passage of the endoscope top section respectively.
[0015] Furthermore, it also includes an eccentrically expandable head capsule arranged at the head of the main catheter of the endoscope.
[0016] In another step, the top section of the endoscope is in the shape of a sleeve, and the head section of the working channel tube is movably sleeved in the top section of the endoscope, and the head section of the working channel tube is covered with an eccentrically expandable head section capsule.
[0017] In order to achieve better bending without affecting patency, the working channel tube and / or the main tube is any one of a flexible hose, a radially reinforced flexible hose, a coated spring tube, a coated spiral tube, and a distal pre-bent tube.
[0018] The beneficial effects of the utility model are:
[0019] 1. The top section of the endoscope is separated from the head section of the endoscope, which increases the range of motion of the endoscope tip. The body tissue that can be touched can be pushed in the opposite direction and bend, which significantly increases the space area that the endoscope tip can touch. In addition, the eccentrically expandable top section balloon set at the top section of the endoscope can further increase the bending degree by adjusting the expansion degree of the top section balloon, making it easy for the endoscope tip to touch difficult corners within the bending radius of traditional endoscopes.
[0020] 2. The short-term expansion of the flexible free parts of the top segment capsule, the head capsule, and the head segment capsule can deeply massage the tissue mucosa it contacts, promote lymphatic and venous return, and improve local blood supply; the compliance of the tissue can also be judged by observing the degree of tissue deformation under the same pressure.
[0021] 3. The working channel tube is movably combined with the main endoscope tube. When the main endoscope tube itself cannot be adjusted, the working channel tube can still be moved to make the opening in the working channel at the front end of the endoscope easier to reach difficult corners.
[0022] 4. The top section of the endoscope is provided with a plurality of eccentrically inflatable balloons, which further increases the adjustment accuracy of the tip position of the endoscope.
[0023] 5. The setting of the protrusion extends the effective distance of the tip of the endoscope, especially when negative pressure is connected to the working channel tube, the stones in the lower calyx can be adsorbed and moved to the upper calyx or other favorable positions, and then the lithotripsy can be performed.
[0024] 6. The easily stretchable middle portion keeps the endoscope top section stably connected to the endoscope main catheter when the endoscope top section moves, and will not separate from the endoscope main catheter head.
[0025] 7. The design of the working channel tube head section being movably mounted inside the top section of the endoscope further increases the range of motion of the opening in the working channel, making it easier to reach difficult corners during surgery.
[0026] 8. An eccentrically expandable head segment capsule is provided on the head segment of the working channel tube, which, combined with the endoscope top segment capsule, significantly improves the bending adjustment accuracy of the endoscope tip and increases the range of motion.
[0027] 9. An eccentrically expandable head capsule is provided at the head of the endoscope main tube, which, combined with the endoscope top segment capsule and / or the head segment capsule on the working channel tube head segment, further improves the bending adjustment accuracy of the endoscope tip and increases the range of motion of the endoscope tip.
[0028] In addition to the existing endoscope main catheter bending adjustment technology, the utility model provides an endoscope top section with an eccentric expansion sac, and the working channel tube is peeled off from the main catheter, adding multiple powerful innovative structures that can reduce the bending radius, so that the tip of the endoscope can easily reach difficult corners, thereby meeting the clinical demand for precise control of the position of the endoscope tip to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The accompanying drawings which do not limit the present invention are as follows:
[0030] Figure 1A : Schematic diagram of embodiment 1
[0031] Figure 1B : Partial cutaway diagram of Example 1
[0032] Figure 1C : A partial cutaway diagram of the top segment bladder 16 in the expanded state of Example 1
[0033] Figure 1D : Schematic diagram of the section in which the endoscope tip is located at the neck of the lower renal calyx K1 in Example 1
[0034] Figure 1E : Schematic diagram of the bending state of the head area of the endoscope in Example 1. The dotted line indicates the bending state of the head area of the endoscope in the prior art. The bending radius of the head area or the tip area of the endoscope in the utility model is significantly smaller than that of the prior art.
[0035] Figure 1F: A partial cross-sectional diagram of another structure of Example 1 when the head area is not bent
[0036] Figure 1G : Schematic diagram of Example 1 where the endoscope head area is located in the renal pelvis K0
[0037] Figure 2A : Partial cutaway diagram of Example 2, arrows indicate the direction of water flow and negative pressure suction
[0038] Figure 2B : Partial cutaway diagram of another embodiment 2, arrows indicate the direction of water flow and negative pressure suction
[0039] Figure 3A : A partial cutaway diagram of a solution of Example 3
[0040] Figure 3B : A partial cutaway schematic diagram of another solution of Example 3
[0041] Figure 4A : A partial cutaway diagram of a solution of Example 4
[0042] Figure 4B : Embodiment 4 Another partial cutaway schematic diagram of the scheme DETAILED DESCRIPTION
[0043] The embodiments of the present invention are not limited to the following:
[0044] Embodiment 1:
[0045] like Figures 1A-1G As shown, the top section curved medical endoscope 1 includes an elongated endoscope main guide tube 11, as shown in FIG. Figure 1A As shown, the endoscope main catheter 11 includes an endoscope main catheter head 111 located at the distal end, an elongated endoscope main catheter body 112 and an endoscope main catheter tail handle 113 located at the proximal end. The endoscope main catheter head 111 region is provided with bending components such as snake bones and front pull wires for local bending (not shown). The endoscope main catheter tail handle 113 is provided with a bending adjustment rod 1132 for adjusting the degree and direction of bending. The bending adjustment rod 1132 acts on the snake bones and other components (not shown) by driving the pull wire. The electronic wire group 151 (see FIG. 15 ) connected to the spying component 15 Figure 1B ) passes through the outlet 1131 of the electronic wire group 151 opened on the handle 113 at the tail end of the endoscope main catheter.
[0046] The biggest difference from the prior art is that the inner cavity 110 of the main endoscope catheter 11 is provided with a working channel tube 12 that runs through the head and tail, and the inner cavity of the working channel tube 12 constitutes a working channel 120. The working channel 120 is used for passing medical tools when in use, such as various ablation catheters, guide wires, stone baskets, optical fibers, ultrasonic catheters, etc. The working channel 120 is provided with an inner working channel opening 1201 that enters the body when in use and an outer working channel opening 1202 that is outside the body. The working channel of the utility model is easy to bend. The tube 12 is movably mounted on the inner cavity 110 of the endoscope main tube 11, and the working channel tube tail section 12c protrudes from the extension section 1100 of the inner cavity 110 of the endoscope main tube 11 on the handle 113 at the tail end of the endoscope main tube, and the outer opening 1202 of the working channel is located on the enlarged joint 1200 at the end of the working channel tube tail section 12c; the working channel tube 12 can move and rotate axially in the inner cavity 110 of the endoscope main tube 11, thereby increasing the flexibility and range of motion of the endoscope tip located at the farthest end when in use.
[0047] The endoscope also includes a sleeve-shaped endoscope top section 14 separated from the endoscope main conduit 11, the endoscope top section 14 is connected to the head 111 of the endoscope main conduit 11 through the spiral tube-shaped middle section 13, and the distance between the bottom end 142 of the endoscope top section 14 and the top end 1111 of the head 111 of the endoscope main conduit 1 is changed by moving the working channel tube 12 or the middle section 13; in this example, the peeping component 15 is arranged at the front end 141 of the endoscope top section, and the front end of the endoscope in this example is the front end of the endoscope top section. End 141; the outer surface of the endoscope top segment 14 is covered with a thin film-like eccentrically expandable endoscope top segment sac 16, and the endoscope top segment sac 16 is composed of an endoscope top segment sac connecting portion 161 and an endoscope top segment sac free portion 162. The endoscope top segment sac connecting portion 161 is in sealing contact with the outer surface of the endoscope top segment 14. After the external fluid is filled into the endoscope top segment sac inner cavity 160 through the endoscope top segment sac passage 1600, the endoscope top segment sac free portion 162 is eccentrically expanded and deformed.
[0048] like Figure 1B As shown, the top segment sac 16 is in a non-expanded state, the working channel tube head segment 12a is tightly sleeved inside the endoscope top segment 14, the working channel tube segment 12b region between the endoscope top segment bottom end 142 and the endoscope main catheter head top end 1111 is sleeved with a spiral tubular middle portion 13, the middle portion distal end 131 is connected to the endoscope top segment bottom end 142, the middle portion proximal end 132 is connected to the endoscope main catheter head top end 1111, the internal space of the spiral tubular middle portion 13 is connected to the top segment sac passage 1600 located in the wall of the endoscope top segment 14 and the wall of the endoscope main catheter 11 and accommodates the electronic wire group 151.
[0049] Figure 1CThe top segment balloon 16 of the endoscope is inflated, and external gas or liquid passes through the top segment balloon passageway outer opening 1602 (such as Figure 1A , Figure 1B As shown, the outer opening 1602 of the top segment sac passage can be blocked by a sealing cap 1603) through the top segment sac passage 1600 in the wall of the endoscope main catheter 11, the internal space of the spiral tube-shaped middle part 13, the top segment sac passage 1600 in the wall of the endoscope top segment 14, and the inner opening 1601 of the top segment sac passage to enter the top segment sac inner cavity 160. The pressure in the top segment sac inner cavity 160 increases, driving the top segment sac free portion 162 to expand and deform, and the volume of the top segment sac inner cavity 160 increases synchronously. When the top segment sac free portion 162 does not encounter any obstacles during expansion, the endoscope top segment 14 does not move as the top segment sac free portion 162 expands. The top segment sac 16 can be made of flexible materials with good compliance, such as silicone rubber, latex, and thermoplastic elastomer, and can also be made of non-compliant, semi-compliant materials such as nylon, block polyether amide, etc. as needed.
[0050] like Figure 1D As shown, when the endoscope main catheter head 111, the endoscope top segment 14 and part of the working channel tube 12 are located in the kidney K, specifically in the renal pelvis K0, the expanded top segment capsule free portion 162 will be blocked and restricted by the renal pelvis K0 tissue, and the reaction force causes the endoscope top segment 14 to rotate and displace in the direction opposite to the expansion, so that the endoscope tip is bent toward the renal calyx K1 and aligned with the renal calyx K1. At this time, the laser optical fiber 2 extends from the opening 1201 in the working channel to touch or approach the stone S, which makes up for the insufficient bending degree of the endoscope tip in the prior art; the short-term expansion of the flexible top segment capsule free portion 162 has a deep massage effect on the mucous membrane of the kidney K tissue it contacts, which can promote lymphatic and venous return and improve local blood supply; the compliance of the kidney K tissue or other organs can be judged by observing the deformation degree of the kidney K tissue under the same pressure.
[0051] like Figure 1E As shown, the kidney K tissue is hidden. Compared with the bending radius of the endoscope tip in the prior art indicated by the dotted line, when the endoscope top segment balloon 16 is inflated, the bending radius of the endoscope tip of the utility model is significantly reduced, making it easy to enter difficult corners that may be encountered during surgery.
[0052] In order to improve the working channel tube 12 and better adjust the bending of the endoscope tip, the working channel tube 12 is any one of a flexible hose, a radially reinforced flexible hose, a coated spring tube, a coated spiral tube, and a distal pre-bent tube. Figure 1FThe figure shows a working channel tube 12 which is composed of a tubular membrane 124 and a spiral wire 123 with relatively large radial strength. It is easier to bend and deform with a small radius while maintaining the patency of the working channel 120. Secondly, a bending member (not shown) is arranged near the top section 14 of the endoscope at the working channel tube body section 12b to further adjust the degree and direction of bending, thereby increasing the ability to adjust the bending of the tip of the endoscope.
[0053] like Figure 1G As shown, in specific use, such as in a ureterolithotomy, the main catheter 11 of the endoscope is extended from the opening in the sheath tube 3 and enters the renal pelvis K0. In this case, there is a stone S in the lower calyx K1, but the renal pelvis infundibulum angle IPA is too small, and the endoscope tip of the prior art is difficult to enter. The top segment curved medical endoscope 1 of the utility model, when the endoscope top segment capsule 16 is expanded, the top segment capsule free portion 162 is blocked and restricted by the renal pelvis K0 tissue and cannot continue to expand to the right, and the reaction force pushes the endoscope top segment 14 to move to the lower left, and the endoscope top segment tip 141, i.e., the endoscope The tip is directed toward the infrarenal calyx K1, and the working channel tube 12 is driven from outside the body, so that the tip 141 of the endoscope top section can be further moved toward the infrarenal calyx K1. At this time, although the free portion 162 of the endoscope top section capsule is restricted by the renal pelvis K0 tissue to expand to the right, it can undergo a downward associated deformation or slight sliding, which cooperates with the movement of the tip 141 of the endoscope top section toward the infrarenal calyx K1, so that the tip 141 of the endoscope top section can be closer to or contact the stone S, so as to better start the lithotripsy operation or grasp the stone S and transfer it to the upper renal calyx K2 or other positions of the renal pelvis K0 before starting the lithotripsy operation.
[0054] The endoscope top section 14 is separated from the endoscope main catheter head 111, which increases the range of motion of the endoscope tip. The body tissue that can be touched can be pushed in the opposite direction and bent, and the possible contact space area is significantly increased. In addition, an eccentrically inflatable top section balloon 16 is arranged on the endoscope top section 14. The degree of bending is further improved by adjusting the expansion degree of the top section balloon 16, so that the endoscope tip can easily reach difficult corners within the bending radius of traditional endoscopes. The easily extendable middle section maintains a stable connection between the endoscope top section and the endoscope main catheter when the position of the endoscope top section moves, thereby keeping the electrical signal and fluid pathways unobstructed.
[0055] The working channel tube 12 is movably combined with the endoscope main guide tube 11. When the endoscope main guide tube 11 with a bending function cannot be further adjusted, the working channel tube 12 can still be moved to make the opening 1201 in the working channel easier to reach difficult corners during surgery.
[0056] The top section bending described in the present invention refers to the bending displacement of the endoscope top section 14 relative to the endoscope main conduit 11, that is, the endoscope top section 14 can be bent to one side when the main conduit 11 is placed vertically; the connection between the endoscope top section 14 and the endoscope main conduit 11 head 111 includes two situations, one is: the endoscope top section 14 is connected to the endoscope main conduit 11 head 111 through the middle part 13; the second is: the endoscope top section 14 is connected to the endoscope main conduit 11 head 111 through the working channel tube 12, when the peeping component 15 is arranged at the endoscope top section tip 141, the electronic wire group 151 of the peeping component 15 is arranged in the tube wall of the working channel tube 12 (figure omitted).
[0057] The eccentric expansion of the free portion 162 of the endoscope top segment sac includes two situations. First, in a non-bending state, the free portion 162 of the endoscope top segment sac expands on one side of the central axis of the endoscope main catheter 11; second, in a non-bending state, the free portion 162 of the endoscope top segment sac expands circumferentially around the central axis of the endoscope main catheter 11 (see Example 4), but it is an asymmetric circumferential expansion, and the degree of expansion on at least one side is different; when the expansion of one side is restricted, the endoscope top segment 14 will be pressed to the opposite side, thereby causing the endoscope top segment 14 to bend and displace relative to the endoscope main catheter 11.
[0058] The middle part 13 mainly serves as a link. One end of the middle part 13 is connected to the head 111 of the endoscope main catheter 1, and the other end is connected to the top section 14 of the endoscope, playing the role of fluid transportation, electronic wire group 151 accommodation and tethering. The middle part 13 can be deformed over a certain distance without affecting its fluid transportation, electronic wire group accommodation and tethering functions. The tethering function refers to tethering the endoscope top section 14 to the endoscope main catheter head 111 through the middle part 13.
[0059] Furthermore, a hydrophilic coating is provided on the outer surfaces of the top segment capsule 16, the working channel tube 12, the endoscope main tube 11, the endoscope top segment 14, and the middle portion 13. Hydrophilic polymer materials such as polyvinyl pyrrolidone, polyacrylamide, polyethylene glycol, and polyvinyl alcohol may be used. Composite antibacterial agents may also be added to the coating to significantly improve the lubrication performance, reduce contact resistance, and further reduce the mechanical damage to the mucosa and other body tissues caused by surgical operations. It is more conducive to the sliding performance between the relatively contacting tissues after the free portion 162 of the top segment capsule expands, and helps the continued displacement of the tip of the endoscope when the capsule 16 is in the expanded state.
[0060] The utility model covers hard and soft endoscopes of medical endoscopes, and the snooping component 15 refers to a combination of one or more of an electronic or optical endoscope component, a pressure sensor, a temperature sensor, a body fluid conductivity sensor, a pH sensor, an ultrasonic probe, etc.
[0061] Embodiment 2:
[0062] like Figure 2A , Figure 2B As shown, the biggest difference between this embodiment and the above embodiment is that it also includes a protrusion 143 extending forward from the endoscope top segment tip 141, the protrusion 143 is cylindrical, and is composed of a protrusion head 1431, a protrusion middle portion 1432, and a protrusion connection portion 1433. The protrusion connection portion 1433 circumferentially covers the area below the endoscope top segment tip 141, and the area of the opening 1430 on the protrusion is larger than the area of the opening 1201 in the working channel, which can better play the adsorption effect; Figure 2A It is shown that when the top segment capsule 16 is inflated, the opening 1430 on the protrusion touches the stone S located in the lower renal calyx K1. At this time, the external negative pressure is connected to the working channel 120, and the opening 1430 on the protrusion absorbs the stone S, so that the stone S can be moved out of the lower renal calyx K1; the protrusion 143 can be made of flexible materials such as silicone rubber, thermoplastic elastomer, etc., preferably transparent; the protrusion connection part 1433 and the area below the top segment tip 141 of the endoscope can be tightly connected as a whole, or can be easily separated. During the operation, the protrusion 143 with different areas, lengths, and curvatures of the opening 1430 on the protrusion can be selected according to needs, and then connected to the area below the top segment tip 141 of the endoscope for use.
[0063] Figure 2B Another solution is shown, specifically, an endoscope top segment capsule 16 is respectively arranged on both sides of the sleeve-shaped endoscope top segment 14, the endoscope top segment first capsule 16a, and the endoscope top segment second capsule 16b; the capsule inner cavity 160 of the endoscope top segment first capsule 16a is connected to the outside through the endoscope top segment first capsule passage inner opening 1601a, the endoscope top segment first capsule passage 1600a, and the first capsule 16a passage outer opening is arranged at the end of the endoscope main catheter tail handle 11 3 (figure omitted); the inner cavity 160 of the second bladder 16b of the endoscope top segment is connected to the outside via the inner opening 1601b of the second bladder passage of the endoscope top segment and the second bladder passage 1600b, and the outer opening of the second bladder 16b passage is arranged on the handle 113 at the tail end of the endoscope main catheter (figure omitted), and the endoscope top segment 14 is provided with two eccentrically expandable top segment bladders in opposite positions, and by setting different expansion degrees, the adjustment accuracy of the endoscope tip position is further increased.
[0064] Embodiment 3:
[0065] In order to continue to improve the adjustment ability of the endoscope tip, such as Figure 3AIn one embodiment, the top section 14 of the endoscope is in the shape of a sleeve, and the working channel tube head section 12a is movably sleeved in the top section 14 of the endoscope. During use, the inner opening 1201 of the working channel can continue to extend forward. At this time, the extended inner opening 1201 of the working channel is the tip of the endoscope, which extends the range of motion of the tip of the endoscope. Furthermore, the working channel tube head section 12a is coated with an eccentrically expandable head section capsule 122, and the head section capsule connection portion 1221 is sealed and connected to the outer surface of the working channel tube head section 12a. The head section capsule free portion 1222 is in an expanded state, and the head section capsule inner cavity 1220 is opened through the head section capsule passage. 1223 is connected to the outside with the head segment capsule passage 1224 located in the wall of the working channel tube 12, and the outer opening of the head segment capsule passage 1224 is set on the tail handle 113 of the endoscope main catheter (not shown), and an eccentrically expandable head segment capsule 122 is set on the head segment 12a of the working channel tube. Combined with the endoscope top segment capsule 16, the bending adjustment accuracy of the endoscope tip is significantly improved and the range of motion is increased. When in use, after the endoscope top segment capsule 16 is expanded, the working channel tube 12 can be rotated to adjust the position and then the head segment capsule 122 can be filled and expanded, so as to more accurately adjust the position of the endoscope tip, i.e., the opening 1201 in the working channel.
[0066] Figure 3B Another scheme is shown, which also includes an eccentrically expandable head capsule 114 arranged at the head 111 of the endoscope main catheter 11, the head capsule connecting portion 1141 is connected to the outer surface of the head 111 of the endoscope main catheter, the head capsule free portion 1142 is in a filled and expanded state, and the head capsule inner cavity 1140 is connected to the outside through a passage (not shown) opened in the wall of the endoscope main catheter 11; the endoscope main catheter head is provided with an eccentrically expandable head capsule 114, which, combined with the endoscope top segment capsule 16 and the eccentrically expandable head segment capsule 122 on the working channel tube head segment 12a, further improves the bending adjustment accuracy and amplitude of the endoscope tip in multiple dimensions and significantly increases the range of motion of the endoscope tip.
[0067] Embodiment 4:
[0068] like Figure 4A A structure is shown, in which the endoscope top section 14 is in the shape of a sleeve, and the sleeve-shaped endoscope top section bladder 16 is sleeved outside the endoscope top section 14. One side of the free portion 162 of the endoscope top section bladder 16 is a thin-walled free portion 162a, and the other side is a thick-walled free portion 162b. When the inner cavity 160 of the top section bladder is filled with fluid, the thin-walled free portion 162a expands significantly first, and the thick-walled free portion 162b expands slightly. The final result is still eccentric expansion. The sleeve-shaped endoscope top section bladder 16 is easier to assemble and connect with the endoscope top section 14 during production.
[0069] Figure 4BAnother structure is shown, in which the working channel tube head section 12a is connected to the endoscope top section 14 as a whole, the working channel tube tip 121 is located in the endoscope top section tip 141 area, and the endoscope top section 14 is an arc-shaped sheet with a C-shaped horizontal cross-section. This subtractive design can make the endoscope tip smaller in diameter, making it easier to enter narrow corners during surgery; the circumferentially discontinuous endoscope top section 14 can also be in the shape of a tile, a crescent, etc.
[0070] The positions of various tubes and components in the utility model are described as follows: the head portion is toward the distal end and enters into the body when in use; the tip refers to the farthest end of the endoscope or the farthest part of a component; the tail portion is toward the proximal end and is usually located outside the body when in use; the inner opening is the distal opening, and the outer opening is the proximal opening; "forward" is toward the distal direction, and "backward" is toward the proximal direction.
[0071] The hydrophilic coating described in Example 1 can be applied to the head capsule 115 and the head segment capsule 122 described in the present invention.
[0072] A plurality of top segment balloons 16 may also be provided and arranged in series (not shown), and the curvature of the tip of the endoscope may be adjusted by different filling pressures or different top segment balloon 16 shapes and different wall thicknesses.
[0073] In addition to the existing endoscope main catheter bending adjustment technology, the utility model is provided with an endoscope top section 14 with an eccentric expansion sac, and the working channel tube 12 is peeled off from the endoscope main catheter 11, adding multiple powerful elements that can reduce the bending radius, so that the tip of the endoscope is easy to reach difficult corners, and the clinical demand for precise control of the position of the tip of the endoscope is met to the greatest extent, reducing tissue damage during surgery, greatly saving surgery time, and reducing treatment costs; it can be used for endoscopic medical operations in various natural cavities including cardiovascular and respiratory tracts, lacrimal ducts, ear canals, reproductive tracts, and digestive tracts, or in the third spaces of living organisms such as the chest cavity and abdominal cavity, and can also be used for medical operations of penetrating wounds, pathological sinus tracts, etc.; it can be specifically made into gastroscopes, duodenoscopes, bronchoscopes, nasopharyngeal and laryngoscopes, ureteroscopes, cystoscopes, hysteroscopes, colposcopes, arthroscopes, etc.
Claims
1. A top-section curved medical endoscope, comprising an elongated endoscope main catheter (11), wherein the inner cavity (110) of the endoscope main catheter (11) is provided with a working channel tube (12) running through the head and tail, wherein the inner cavity of the working channel tube (12) constitutes a working channel (120), wherein the working channel (120) is provided with an inner working channel opening (1201) for entering the body during use and an outer working channel opening (1202) for the outer part of the body, wherein: The working channel tube (12) is easily bendable and can be movably sleeved in the inner cavity (110) of the endoscope main conduit (11). The working channel tube (12) can at least axially move in the inner cavity (110) of the endoscope main conduit (11). The working channel tube (12) also includes an endoscope top section (14) separated from the endoscope main conduit (11). The endoscope top section (14) is indirectly connected to the head (111) of the endoscope main conduit (11). The distance between the bottom end (142) of the endoscope top section (14) and the top end (1111) of the head (111) of the endoscope main conduit (11) is changed by the movement of the working channel tube (12) and / or the middle section (13). The spying component (15) is provided The endoscope is arranged at the tip end (141) of the endoscope top segment and / or the tip end (121) of the working channel tube; the outer surface of the endoscope top segment (14) is covered with at least one endoscope top segment sac (16) that can be eccentrically expanded, and the endoscope top segment sac (16) is composed of an endoscope top segment sac connecting portion (161) and an endoscope top segment sac (16) free portion (162); the endoscope top segment sac (16) connecting portion (161) is in sealing contact with the outer surface of the endoscope top segment (14); after the external fluid is filled into the inner cavity (160) of the endoscope top segment sac through the endoscope top segment sac passage (1600), the free portion (162) of the endoscope top segment sac (16) is eccentrically expanded and deformed.
2. The top-section curved medical endoscope according to claim 1, characterized in that: It also includes a protrusion (143) extending forward from the tip (141) of the top section of the endoscope. The protrusion (143) is cylindrical and consists of a protrusion head (1431), a protrusion middle portion (1432), and a protrusion connecting portion (1433). The protrusion connecting portion (1433) circumferentially covers the area below the tip (141) of the top section of the endoscope, and the area of the opening (1430) on the protrusion is larger than the area of the opening (1201) in the working channel.
3. The top-section curved medical endoscope according to claim 1, characterized in that: The top section (14) of the endoscope is connected to the head (111) of the main endoscope tube (11) through the middle section (13), and the middle section (13) is any one or more of a threaded tube, a coated threaded tube, a corrugated tube, an easily stretchable belt, and a curved line.
4. The top-section curved medical endoscope according to claim 1, characterized in that: The working channel tube head section (12a) is connected to the endoscope top section (14) as a whole, the working channel tube front end (121) is located in the endoscope top section front end (141) area, and the endoscope top section (14) is in any one of a sleeve shape, a tile shape, and an arc-shaped sheet with a horizontal cross section of C.
5. The top-section curved medical endoscope according to claim 1, characterized in that: The top section (14) of the endoscope is in the shape of a sleeve, the working channel tube head section (12a) is movably sleeved in the top section of the endoscope, the distal end (131) of the middle section (13) is connected to the top section (14) of the endoscope, and the proximal end (132) of the middle section (13) is connected to the head (111) of the endoscope main tube (11) and / or the working channel tube body section (12b).
6. The top-section curved medical endoscope according to claim 1, characterized in that: The endoscope top section (14) is in the shape of a sleeve, and the sleeve-shaped endoscope top section sac (16) is sleeved outside the endoscope top section (14). The free portion (162) of the endoscope top section sac (16) is located on one side or the free portion (162) of the endoscope top section sac (16) is arranged circumferentially but the wall thickness of the free portion (162) of the endoscope top section sac (16) is uneven.
7. The top-section curved medical endoscope according to claim 1, characterized in that: The endoscope top section (14) is in the shape of a sleeve, and an endoscope top section sac (16) is respectively arranged on both sides of the endoscope top section (14); the endoscope top section first sac (16a) and the endoscope top section second sac (16b) are respectively connected to the external fluid via the endoscope top section first sac passage (1600a) and the endoscope top section second sac passage (1600b).
8. The top-section curved medical endoscope according to claim 1, characterized in that: It also includes an eccentrically expandable head balloon (114) disposed at the head (111) of the endoscope main catheter (11).
9. The top-section curved medical endoscope according to claim 1, characterized in that: The endoscope top section (14) is in the shape of a sleeve, and the working channel tube head section (12a) is movably sleeved in the inner cavity of the endoscope top section. The working channel tube head section (12a) is covered with an eccentrically expandable head section capsule (122).
10. The top-section curved medical endoscope according to claim 1, characterized in that: The working channel tube (12) and / or the main tube (11) is any one of a flexible hose, a radially reinforced flexible hose, a coated spring tube, a coated spiral tube, and a distal pre-bent tube.