CN211877285U - Force measurement guide sheath - Google Patents

Abstract

The utility model discloses a force measurement guide sheath, which comprises a guide sheath body, wherein the guide sheath comprises an inner catheter and an outer catheter sleeved outside the inner catheter; and a load cell for measuring an axial thrust applied to the introducer sheath, the load cell being disposed at a forward end of the inner catheter or the outer catheter; the device can visually display the thrust applied to the catheter, is convenient for an operator to control the force, prevents the patient from being damaged, and improves the safety of the guide sheath.

Description

Force measurement guide sheath

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a dynamometry guide sheath.

Background

When an operation is performed in a body, various catheters are often used firstly to be placed in the body to establish a channel, and then various medical instruments are placed in the body through the catheters. Such catheters are used to introduce medical devices into a lumen, duct, vessel or cavity of a patient, and more particularly to remove obstructions and/or access sheaths through which medical devices are passed. Ureteral access sheaths are often used to create catheters, for example, during endoscopic procedures, to facilitate the passage of instruments into the urinary tract. The use of catheters in surgery is beneficial in many ways: the operation difficulty is reduced, and the operation wound is smaller. However, if too much force is applied during placement, damage to the lumen, such as splitting of the urothelium by the ureteral access sheath, can result in a prolonged period of post-operative repair and increased potential for ureteral stenosis. Therefore, there is a need in the art for a new introducer sheath that can detect the amount of pushing force applied to the catheter during insertion, and increase the safety of the catheter to assist in the insertion procedure.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a force measuring guide sheath which can detect the thrust and is safer to use.

The force-measuring medical sheath is provided, an inner catheter and an outer catheter are sleeved outside the inner catheter, and the inner catheter and the outer catheter are assembled to form a guiding sheath body after being connected; and the force measuring sensor is connected with the inner catheter or the outer catheter, pushes the force measuring sensor to drive the guide sheath body to move, and measures the axial thrust applied to the guide sheath body.

The technical scheme at least has the following beneficial effects: the device can visually display the thrust applied to the catheter, is convenient for an operator to control the force, prevents the patient from being damaged, and improves the safety of the guide sheath.

In some embodiments, a through hole is provided in the load cell, and the load cell is sleeved on the inner conduit or the outer conduit. The axial force can be more conveniently measured by sleeving installation, the installation is simple, and the installation difficulty is reduced.

In some embodiments, the load cell is removably disposed on the inner conduit or the outer conduit. The force cell sensor is convenient for the catheter to be disinfected and cleaned after being disassembled, so that the catheter can be reused.

In some embodiments, a push block is further fixed at the front end of the other outer catheter or the inner catheter of the introducer sheath body, and the push block is in contact with the sensing part of the load cell. The push block can be convenient for an operator to push and press the force measuring sensor, and the operator can conveniently control the catheter.

In some embodiments, at least one raised top block is arranged on one surface of the push block, which is in contact with the sensing part of the load cell, and the top block is pressed against the sensing part of the load cell. The jacking block can concentrate the thrust, and reduce the dispersion of the thrust in other directions except the axial direction, thereby improving the accuracy of force measurement.

In some embodiments, the push block is integrally formed with the outer catheter or the inner catheter. The processing is convenient, and the production efficiency is higher.

In some embodiments, the outer catheter peripheral surface is further provided with a stop mechanism that prevents the load cell from sliding freely toward the rearward end. The limiting mechanism can play a role in supporting the force transducer and prevent the force transducer from falling off when pushed.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the described figures are only some embodiments of the invention, not all embodiments, and other designs and figures can be obtained by those skilled in the art without inventive effort, based on these figures:

fig. 1 is a schematic structural view of a first embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an introducer sheath according to a first embodiment of the present invention;

fig. 3 is a schematic partial cross-sectional view of a second embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of an introducer sheath according to a second embodiment of the present invention;

fig. 5 is a schematic structural view of a third embodiment of the present invention;

fig. 6 is a schematic partial cross-sectional view of a fourth embodiment of the present invention;

fig. 7 is a schematic structural view of a fifth embodiment of the present invention;

fig. 8 is a schematic structural view of a sixth embodiment of the present invention;

fig. 9 is a schematic structural view of a seventh embodiment of the present invention;

fig. 10 is a schematic structural view of an eighth embodiment of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, the introducer sheath 1 of the present invention includes inner catheters 210 and 220 and outer catheters 110 and 120 sleeved outside the inner catheters 210 and 220, the inner catheters 210 and 220 slidably move inside the outer catheters 110 and 120, a connecting structure is further provided between the inner catheters 210 and 220 and the outer catheters 110 and 120, the connecting structure can connect the inner catheters 210 and 220 and the outer catheters 110 and 120 after sliding in place to form the introducer sheath 1, and at this time, the introducer sheath 1 can move along the thrust direction no matter the inner catheters 210 and 220 or the outer catheters 110 and 120 are pushed. The front end of the inner catheter 210, 220 or the outer catheter 110, 120 is provided with a force measuring sensor 300, the medical personnel pushes the force measuring sensor 300 to drive the guide sheath 1 to move, and the force measuring sensor 300 detects the axial thrust force applied to the guide sheath 1. It should be noted that the term "leading end" herein refers to the end that is closer to the medical personnel when the device is placed in a patient, and the corresponding "trailing end" refers to the end that is further from the medical personnel when the device is placed in a patient.

The force-measuring sensor 300 is a one-way force-measuring sensor capable of measuring axial pressure, the sensing part of the force-measuring sensor 300 is positioned on the end face, and different types of force-measuring sensors, such as strain type pressure sensors, piezoelectric force-measuring sensors, piezoresistive pressure sensors, miniature pressure sensors and the like, can be purchased through public channels according to requirements. Dynamometry inductor 300 can set up the display screen, and the display screen directly carries out the registration, or has built-in wireless data transmission module in dynamometry inductor 300, and wireless connection carries out the registration to the display device of distant place, or dynamometry inductor 300 is connected through the cable and is carried out the registration with the display screen of distant place.

Referring to fig. 1 and 2, a through hole is formed in the force sensor 300 of the first embodiment, the force sensor 300 is fixedly sleeved on the outer guide tube 110 by an adhesive, and an end surface of the force sensor 300 is pressed against an end surface of the convex ring 101 for positioning. The connecting structure in the first embodiment includes two L-shaped limiting grooves 102 arranged in the outer guide tube 110, two limiting blocks 201 arranged outside the inner guide tube 210, the inner guide tube 210 slides into a vertical groove where the limiting block 201 enters the limiting groove 102, the inner guide tube 210 is rotated to enable the limiting block 201 to enter a horizontal groove of the limiting groove 102, at this moment, the limiting block 201 is limited in the vertical direction, and the outer guide tube 110 and the inner guide tube 210 are connected and move simultaneously. When the force measuring sensor 300 is used, medical personnel applies pressure to the front end face of the force measuring sensor 300 to push the guide sheath 1 to move along the axial direction, and meanwhile, the force measuring sensor 300 can detect the axial thrust. The fixed connection has simple structure, convenient and fast production and very convenient operation.

Referring to fig. 3 and 4, the force sensor 300 of the second embodiment is provided with a through hole with internal threads, the front end of the outer guide tube 120 is sleeved with a connecting ring 104 with external threads, and the force sensor 300 is detachably fixed on the connecting ring 104 through threads. The limiting mechanism of the second embodiment comprises internal threads inside the outer guide tube 120 and external threads outside the inner guide tube 220, the inner guide tube 220 is rotated after sliding in place, and the inner guide tube 220 is in threaded connection with the outer guide tube 120, so that the inner guide tube 220 and the outer guide tube 120 move simultaneously in the same direction. When the force measuring sensor 300 is used, a medical worker applies pressure to the front end face of the force measuring sensor 300, the rear end face of the force measuring sensor 300 is pressed against the connecting ring 104, and the guide sheath 1 is pushed to move along the axial direction. The force measuring sensor 300 in this embodiment can be rotated and unscrewed, which facilitates the disinfection and cleaning of the outer catheter 120, and is suitable for various repeatedly used guide sheaths 1.

Referring to fig. 5, a limit plate 105 and a push block 106 are arranged outside the outer guide tube 110 in the third embodiment, the push block 106 is in contact with the sensing portion of the load cell 300, when the load cell 300 is pushed, the pushing force is too large, the limit plate 105 is additionally arranged to prevent the load cell 300 from freely sliding backwards along the outer guide tube 110, so that the load cell 300 is prevented from contacting the patient, and the third embodiment is safer. The limiting plate 105 and the outer conduit 110 are integrally formed, the push block 106 is detachably sleeved outside the outer conduit 110, the push block 106 is placed on the limiting plate 105, a plurality of protrusions 107 are further arranged on the front end face of the push block 106, and the surfaces of the protrusions 107 are spherical. The force sensor 300 is fixed to the front end of the inner guide tube 210 in a sleeved manner, and when the inner guide tube 210 and the outer guide tube 110 are connected, the surface of the protrusion 107 is pressed against the sensing portion of the force sensor 300. When the force measuring sensor 300 is used, a medical worker applies pressure to the front end face of the force measuring sensor 300, the rear end face of the force measuring sensor 300 is pressed against the bulge 107, the guide sheath 1 is pushed to move along the axial direction, and meanwhile, the force measuring sensor 300 can detect the axial thrust. Because the contact area between the bulge 107 and the force-measuring sensor 300 is small, the bulge 107 can enable the thrust to be intensively exerted on the force-measuring sensor 300 along the axial direction, and the force measured by the force-measuring sensor 300 is further ensured to be close to the actual thrust.

Referring to FIG. 6, the force sensor 300 and the bracket 108 are sleeved outside the outer tube 110 in the fourth embodiment, the bracket 108 is further fixed outside the force sensor 300, the bracket 108 is a limiting mechanism for fixing the force sensor 300, the bracket 108 comprises a supporting plate pressed against the rear end of the force sensor 300 and a supporting ring surrounding the periphery of the force sensor 300, and the bracket 108 is formed by splicing a plurality of pieces. The inner conduit 210 is externally fixed with a push block 203, and the rear end surface of the push block 203 is also provided with a convex ring 204. The force sensor 300 is first sleeved outside the outer guide tube 100, the bracket 108 is then mounted to the rear end of the force sensor 300 in a splice manner, and after the inner guide tube 210 and the outer guide tube 110 are sleeved and connected, the surface of the protruding ring 204 abuts against the sensing portion of the force sensor 300. When the force measuring device is used, a medical worker applies pressure to the front end face of the push block 203, the convex ring 204 on the rear end face of the push block 203 is pressed against the force measuring sensor 300, the guide sheath 1 is pushed to move along the axial direction, and meanwhile, the force measuring sensor 300 can detect the axial thrust. The convex ring 204 can make the thrust force be intensively exerted on the force-measuring sensor 300 along the axial direction, and further ensure that the value measured by the force-measuring sensor 300 is close to the actual thrust force.

Referring to fig. 7, in the fifth embodiment, a shield 400 is fixed outside the front end of the outer guide tube 110, the shield 400 is in a horn shape opened toward the front end, a platform is arranged in the shield 400, a force measuring sensor 300 is further sleeved on the outer guide tube 110, and the force measuring sensor 300 is pressed against the platform. Need the water injection when carrying out the rubble treatment to ureter, the guard shield 400 that sets up can prevent that liquid from splashing, avoids influencing medical personnel to hold, and is safer. The force measuring sensor 300 is arranged in the protective cover 400, so that liquid can be prevented from splashing on the force measuring sensor 300, and the service life is prolonged. When the force measuring sensor 300 is used, the force measuring sensor 300 is directly sleeved outside the outer catheter 110 and is installed, medical personnel applies pressure to the front end face of the force measuring sensor 300, and the rear end face of the force measuring sensor 300 is pressed against a platform in the protective cover 400 to push the guide sheath 1 to move axially. When not in use, the force measuring sensor 300 can be directly taken down, and the installation and the disassembly are very convenient and simple.

Referring to fig. 8, in the sixth embodiment, a hood 500 is fixed to the outside of the front end of the outer guide tube 110, the hood 500 is in a horn shape opened toward the front end, a positioning plate 205 and a load cell 300 are arranged outside the inner guide tube 210, and the load cell 300 is placed on the positioning plate 205. After the inner catheter 210 and the outer catheter 110 are combined, when the force measuring sensor 300 is used, pressure is applied to the force measuring sensor 300 by medical personnel, and the rear end face of the force measuring sensor 300 is pressed against the positioning plate 205 to push the guide sheath 1 to move along the axial direction.

Referring to fig. 9, the connection structure in the seventh embodiment includes a shield 600 fixed outside the front end of the outer guide tube 110, the shield 600 is in a horn shape opened toward the front end, and further includes a mounting plate 206 disposed at the front end of the inner guide tube 210, a claw 207 is disposed on the mounting plate 206, a clamping groove is disposed on the claw 207, the edge of the shield 600 is embedded into the clamping groove for assembly, and the combined inner guide tube 210 and the outer guide tube 110 move in the same direction. A platform is further arranged in the shield 600, a force measurement sensor 300 is further sleeved on the outer guide pipe 110, and the force measurement sensor 300 is pressed against the platform. The mounting plate 206 is further provided with a plurality of top blocks 202, the top blocks 202 are arranged towards the force sensor 300, and when the outer guide tube 110 and the inner guide tube 210 are assembled in place, the top blocks 207 are pressed on the sensing part of the force sensor 300.

Referring to fig. 10, the connection structure in the eighth embodiment includes a shield 700 fixed outside the front end of the outer guide tube 110, the shield 700 is in a horn shape opened toward the front end, and further includes a mounting plate 208 disposed at the front end of the inner guide tube 210, a claw 209 is disposed on the mounting plate 208, a slot is disposed on the claw 209, the edge of the shield 700 is inserted into the slot for assembly, and the assembled inner guide tube 210 and the outer guide tube 110 move in the same direction. The force measuring sensor 300 is sleeved outside the inner guide pipe 210, the force measuring sensor 300 is arranged above and below the mounting plate 208, and after the inner guide pipe 210 and the outer guide pipe 110 are combined in place, the end face of the force measuring sensor 300 is pressed against the end face of the outer guide pipe 110. When the force measuring sensor 300 is used, the mounting plate 208 is pressed to push the guide sheath 1 to move forwards, and meanwhile, the force measuring sensor 300 detects the magnitude of the pushing force.

In other embodiments, the load cell 300 can be fixed to the front end of the outer guide tube 110, 120 or the inner guide tube 210, 220 by other means, such as: through different modes such as fastener connection, through interference fit cover establishment. The load cell 300 can also be removably attached to the front end of the outer guide tube 110, 120 or the inner guide tube 210, 220 by other means, such as: the force measuring sensor 300 can be installed in different ways, such as a combined positioning ring and a soft rubber ring, including but not limited to the embodiments disclosed in the present specification and the drawings. The connection structure between the inner conduits 210 and 220 and the outer conduits 110 and 120 also includes, but is not limited to, the embodiments disclosed in the present specification and the drawings attached thereto.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited thereto, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A dynamometry guide sheath is characterized in that: comprises that

An inner conduit;

the outer catheter is sleeved outside the inner catheter, and the inner catheter and the outer catheter are connected and then assembled to form a guide sheath body;

and the force measuring sensor is connected with the inner catheter or the outer catheter, pushes the force measuring sensor to drive the guide sheath body to move, and measures the axial thrust applied to the guide sheath body.

2. The force measurement introducer sheath of claim 1, wherein: the force measuring sensor is provided with a through hole, and the force measuring sensor is sleeved on the inner guide pipe or the outer guide pipe.

3. The force measurement introducer sheath of claim 1, wherein: the load cell is detachably disposed on the inner conduit or the outer conduit.

4. The force measurement introducer sheath of claim 2 or 3, wherein: and a push block is also fixed at the front end of the other outer catheter or the inner catheter of the guide sheath body and is in contact with the sensing part of the force transducer.

5. The force measurement introducer sheath of claim 4, wherein: at least one raised ejecting block is arranged on one surface of the pushing block, which is in contact with the sensing part of the force sensor, and the ejecting block is pressed against the sensing part of the force sensor.

6. The force measurement introducer sheath of claim 4, wherein: the push block and the outer conduit or the inner conduit are integrally formed.

7. The force measurement introducer sheath of claim 1, wherein: the outer peripheral surface of the outer conduit is also provided with a limiting mechanism which prevents the force cell sensor from freely sliding towards the rear end.

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