CN113332563A - Medical adjustable microcatheter - Google Patents
Medical adjustable microcatheter Download PDFInfo
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- CN113332563A CN113332563A CN202110717066.2A CN202110717066A CN113332563A CN 113332563 A CN113332563 A CN 113332563A CN 202110717066 A CN202110717066 A CN 202110717066A CN 113332563 A CN113332563 A CN 113332563A
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000003780 insertion Methods 0.000 claims abstract description 23
- 230000037431 insertion Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000010862 gear shaping Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M2025/0177—Introducing, guiding, advancing, emplacing or holding catheters having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
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- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a medical adjustable microcatheter, which comprises a microcatheter tube body, wherein a guide wire body is arranged in the microcatheter tube body in a penetrating way; the circumferential surface of the micro catheter body is provided with a first locking hole; the handle is detachably arranged on the outer peripheral surface of the micro catheter tube body and covers the first locking hole, and an installation groove is formed in the top of the handle; the first locking mechanism is arranged in the mounting groove of the handle; the first locking mechanism comprises an insertion bullet, a driving roller, a rotating shaft, a supporting frame and a limiting component; the rotating shaft is eccentrically penetrated through the driving roller, and after the rotating shaft is rotated, the driving roller eccentrically rotates by taking the rotating shaft as a center so as to drive the auxiliary roller to lift; the rotating shaft can drive the driving roller to transversely translate; the first locking mechanism can limit the insertion depth of the guide wire body; under the cooperation of each part of the first locking mechanism, the guide wire body can be effectively and reliably limited, components such as electric power or an air cylinder are not needed, the service life is long, and the cost is low.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a medical adjustable microcatheter.
Background
In recent years, with the development of medical technology, many new treatment methods are continuously appeared, and most prominently, the interventional therapy is the minimally invasive intracavity surgery treatment which adopts high-tech equipment of a television monitor, adopts a small hole at a certain part of a human body, and then uses a catheter to go deep into blood vessels in the body of a patient to perform the work of repairing, expanding and dredging.
The existing micro catheter is inconvenient to adjust, is inconvenient to limit and fix after being adjusted, is easy to cause the micro catheter to move, increases the workload of medical staff, and brings higher requirements for the micro catheter by people along with the progress of science and technology and the development of society.
Chinese patent with application number CN201910303509.6 discloses an adjustable microcatheter for cerebrovascular intervention, which comprises a mounting seat, wherein a handle 3 is welded at the bottom of the mounting seat, a mounting groove is formed in one side of the mounting seat, a microcatheter body is slidably mounted in the mounting groove, a movable seat is sleeved on the microcatheter body and slidably mounted in the mounting groove, moving cavities are symmetrically formed in the mounting seat, pillars are welded on the inner wall of one side of each of the two moving cavities, moving columns are rotatably mounted on the two pillars, and one ends of the two moving columns, which are close to each other, extend into the mounting groove; in the use process of the scheme, the micro catheter main body is locked by matching the limiting column and the limiting clamping groove, and the micro catheter main body cannot be suitable for interventional therapy at different depths; in addition, the first cylinder and the second cylinder need external power sources in the using process, so that the matching is required to be tight, and the cost is increased.
Disclosure of Invention
The invention mainly solves the technical problems that: provides a medical adjustable micro-catheter which is convenient for medical personnel to operate and has lower cost.
In order to solve the main technical problems, the following technical scheme is adopted:
a medical adjustable microcatheter comprising:
the micro catheter comprises a micro catheter tube body, a micro catheter tube body and a micro catheter, wherein a guide wire body capable of moving back and forth along the axis of the micro catheter tube body is arranged in the micro catheter tube body in a penetrating manner; the circumferential surface of one end of the micro catheter body is provided with a first locking hole; a plurality of annular limiting grooves are formed in the end part, close to the locking hole, of the guide wire body;
the handle is used for holding by medical staff, is detachably arranged on the outer peripheral surface of the micro catheter tube body and covers the first locking hole, and the top of the handle is provided with an installation groove;
the first locking mechanism is arranged in the mounting groove of the handle and used for locking the insertion depth of the guide wire body; the first locking mechanism comprises an insertion bullet, a driving roller, a rotating shaft, a supporting frame and a limiting component; the inserting bullet can ascend and descend along the first locking hole, the head of the inserting bullet is provided with a gear shaping matched with the limiting groove, and the tail of the inserting bullet is connected with an auxiliary roller capable of rolling; the driving roller is horizontal, and the peripheral surface of the driving roller is abutted against the surface of the auxiliary roller; the rotating shaft is eccentrically penetrated through a driving roller, and after the rotating shaft is rotated, the driving roller eccentrically rotates by taking the rotating shaft as a center so as to drive the auxiliary roller to move towards the first locking hole; one end of the rotating shaft is erected on the supporting frame, and the other end of the rotating shaft extends out of the outer side of the handle; the limiting assembly is arranged at the end part of the rotating shaft close to the support frame and can be clamped or far away from the support frame; the rotating shaft can drive the driving roller to transversely translate, and when the rotating shaft is located at the first position, the limiting assembly is clamped with the supporting frame to restrain the rotating shaft from rotating; when the rotating shaft transversely translates to the second position, the limiting assembly deviates from the supporting frame so as to remove the limitation on the rotation of the rotating shaft.
Preferably, a connection bracket is mounted on the insertion bullet; a guide rod capable of enabling the connecting support to slide is arranged on the inner wall of the limiting groove; a first return spring is arranged between the guide rod and the connecting support, and when the first return spring is in an initial state, the gear shaping is far away from the limiting groove.
Preferably, the first locking mechanism further comprises a second return spring, a first mounting seat and a second mounting seat; the second return spring is connected between the first mounting seat and the second mounting seat and sleeved outside the rotating shaft; the first mounting seat is mounted on the inner wall of the mounting groove, the second mounting seat is rotatably connected to the rotating shaft, and the rotating shaft is located at the first position when the second return spring is in the initial state.
Preferably, a sliding groove parallel to the axis of the rotating shaft is installed at the bottom of the installation groove; and the second mounting seat is provided with a rolling wheel which can slide along the sliding groove towards the bottom side of the mounting groove.
Preferably, the limiting assembly comprises a disc and two plugs arranged on the surface of the disc; the two plugs are respectively positioned at two ends of the diameter of the disc; the disc is arranged on the end surface of the rotating shaft; when the rotating shaft is located at the first position, the plug is inserted into the socket of the support frame.
Preferably, the gear shaping has a plurality ofly, and the quantity is less than the quantity of spacing groove.
Preferably, the handle is divided into a mounting section and a holding section; the mounting groove is positioned in the mounting section; the joint surfaces of the mounting section and the holding section are provided with folded plates sleeved on the outer sides; the mounting section is connected with the two folded plates of the holding section through fasteners; the folded plate of the mounting section extends from the groove bottom of the mounting groove to the notch; the groove bottom plate and the side wall plate of the mounting groove are connected through countersunk screws; the side wall plate of the mounting groove is provided with a mounting hole extending towards the bottom of the groove, and the side wall plate of the mounting groove is in threaded connection with a first fastening bolt capable of transversely penetrating through the mounting hole; the micro-catheter tube body is integrally formed with a mounting column inserted into the mounting port; the mounting column is transversely provided with a passage opening through which the first fastening bolt can penetrate.
Preferably, the device further comprises a second locking mechanism for adjusting the insertion depth of the micro-catheter tube, and the second locking mechanism is sleeved on the outer side of the micro-catheter tube in a sliding manner; the second locking mechanism comprises an adhesive block adhered to the surface of the skin and a holding component arranged on the back of the adhesive block and used for inhibiting the micro-catheter tube from sliding back and forth transversely.
Preferably, the holding components are at least two and are uniformly distributed on the outer peripheral surface of the micro-catheter tube body; the clamping assembly comprises a clamping block, a fixed block, a lifting column and a locking column; the fixed block is arranged on the back of the sticking block; the fixed block is provided with a lifting hole facing the micro catheter body; the lifting column penetrates through the lifting hole, and the tail part of the lifting column is connected with the clasping block; the peripheral surface of the lifting column is provided with a second locking hole; the fixed block is provided with a sliding hole which is opposite to the lifting column and communicated with the lifting hole; the locking column is connected in the sliding hole in a sliding mode, and the tail part of the locking column can be inserted into the second locking hole; a baffle is arranged at the position, close to the tail part, of the locking column; a third return spring is connected between the baffle and the inner wall of the sliding hole; the third return spring is positioned in the sliding hole and wound outside the locking column; and a fourth return spring sleeved outside the lifting column is arranged between the clasping block and the fixed block.
Compared with the prior art, the invention has the following advantages:
(1) the first locking mechanism can limit the insertion depth of the guide wire body; first locking mechanical system is including inserting warhead, supplementary cylinder, axis of rotation, driving roller etc. under the cooperation of each part of first locking mechanical system, can be effectively reliable carry on spacingly to the seal wire body, need not be with the help of subassembly such as electric power or cylinder, long service life, with low costs.
(2) The first locking mechanism is arranged in the limiting groove; the installation of spacing groove and linkage segment, little pipe body all can be dismantled, has reduced first locking mechanism's manufacturing cost, and when little pipe body need be changed simultaneously, the handle can recycle, further practices thrift the cost.
(3) The second locking mechanism is sleeved on the outer side of the micro-catheter tube body, the second locking mechanism can limit the insertion depth of the micro-catheter tube body, the second locking mechanism is simple in structure, convenient to use and high in applicability, and is suitable for micro-catheter tubes with various diameters.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some examples of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of the overall structure;
FIG. 2 is an enlarged schematic view of the first locking mechanism with the rotatable shaft in a second position;
FIG. 3 is an enlarged schematic view of the confinement assembly of FIG. 2;
FIG. 4 is an enlarged schematic view of the first locking mechanism with the rotatable shaft in the first position;
FIG. 5 is an enlarged schematic view of the limiting assembly of FIG. 4;
FIG. 6 is an enlarged schematic view of the clasping assembly when the second locking mechanism is in the locked state;
FIG. 7 is an enlarged schematic view of the clasping assembly when the second locking mechanism is in an unlocked state.
In the figure: 1 is a micro catheter tube, 11 is a first locking hole, 2 is a guide wire body, 21 is a limiting groove, 3 is a handle, 31 is an installation section, 311 is an installation groove, 32 is a holding section, 33 is a folded plate, 34 is a countersunk screw, 35 is a first fastening bolt, 36 is an installation column, 4 is a first locking mechanism, 41 is an insertion bullet, 411 is a connecting bracket, 412 is a guide rod, 413 is a first return spring, 414 is a gear, 42 is a driving roller, 43 is a rotating shaft, 44 is a limiting component, 441 is a disc, 442 is a plug, 45 is a support frame, 46 is an auxiliary roller, 47 is a second return spring, 471 is a first installation seat, 472 is a second installation seat, 473 is a rolling wheel, 48 is a sliding groove, 5 is a second locking mechanism, 51 is an adhesive block, 52 is a holding component, 521 is a holding block, 522 is a fixed block, 523 is a lifting column, 524 is a locking column, 525 is a second locking hole, 526 is a third return spring, 527 is a fourth return spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions.
The first embodiment,
Referring to fig. 1-7, an adjustable medical microcatheter includes a microcatheter body 1, a handle 3, and a first locking mechanism 4.
A guide wire body 2 capable of moving back and forth along the axis of the micro catheter body 1 is arranged in the micro catheter body 1 in a penetrating manner; the circumferential surface of one end of the micro catheter tube body 1 is provided with a first locking hole 11 extending to the guide wire body 2; a plurality of annular limiting grooves 21 are formed in the end part, close to the locking hole, of the guide wire body 2.
The first locking mechanism 4 is arranged in the mounting groove 311 of the handle 3 and is used for locking the insertion depth of the guide wire body 2; the first locking mechanism 4 comprises an insertion bullet 41, a driving roller 42, a rotating shaft 43, a supporting frame 45 and a limiting component 44; the insertion bullet 41 can be lifted along the first locking hole 11, the head part is provided with a gear shaping 414 matched with the limiting groove 21, and the tail part is connected with an auxiliary roller 46 capable of rolling; the auxiliary roller 46 horizontally rotates, the number of the gear shaping teeth 414 is less than that of the limiting grooves 21, and the gear shaping teeth 414 can be inserted into or separated from the limiting grooves 21 along with the lifting of the insertion warhead 41; when the gear shaping 414 is inserted into the limiting groove 21, the guide wire body 2 is limited by the gear shaping 414, so that the insertion depth of the guide wire body 2 is locked; a connection bracket 411 is mounted on the insertion bullet 41; a guide rod 412 which can enable the connecting bracket 411 to slide is arranged on the inner wall of the limiting groove 21; a first return spring 413 is disposed between the guide rod 412 and the connecting bracket 411, and when the first return spring 413 is in an initial state, the gear shaping 414 is far away from the limiting groove 21.
The driving roller 42 is horizontal and the peripheral surface is against the surface of the auxiliary roller 46; the rotating shaft 43 is eccentrically penetrated through the driving roller 42, and after the rotating shaft 43 is rotated, the driving roller 42 eccentrically rotates by taking the rotating shaft 43 as a center so as to drive the auxiliary roller 46 to ascend and descend; one end of the rotating shaft 43 is erected on the supporting frame 45 through a rotatable sliding bearing, the other end of the rotating shaft extends out of the handle 3, and the other end of the rotating shaft 43 is connected with the groove wall of the mounting groove 311 through a rotatable sliding bearing; the rotatable sliding bearing can be formed by connecting a rolling bearing outside the spline housing or referring to other prior art; under the action of the sliding bearing, the rotating shaft 43 can drive the driving roller 42 to translate back and forth along the axial direction; normally, the peripheral surface of the driving roller 42 is uniformly distributed with a plurality of balls (not shown), and the balls reduce the friction between the driving roller 42 and the auxiliary roller 46 when the rotating shaft 43 transversely translates; the limiting assembly 44 is mounted at the end part of the rotating shaft 43 close to the support frame 45 and can be clamped or far away from the support frame 45; when the rotating shaft 43 is at the first position, the limiting component 44 is clamped with the supporting frame 45 to inhibit the rotating shaft 43 from rotating; when the rotating shaft 43 transversely translates to the second position, the limiting component 44 deviates from the supporting frame 45 to release the limitation on the rotation of the rotating shaft 43, that is, when the rotating shaft 43 transversely translates to the second position, the rotating shaft 43 can drive the driving roller 42 to rotate, and the eccentric rotation of the driving roller 42 drives the inserted bullet 41 to ascend and descend.
The first locking mechanism 4 further includes a second return spring 47, a first mounting seat 471 and a second mounting seat 472; the second return spring 47 is connected between the first mounting seat 471 and the second mounting seat 472, and is sleeved outside the rotating shaft 43; the first installation seat 471 is installed on the inner wall of the installation groove 311, the second installation seat 472 is rotatably connected to the rotating shaft 43 through a bearing, and when the second return spring 47 is in an initial state, the rotating shaft 43 is in a first position, that is, when the rotating shaft 43 translates to a second position, under the action of the second return spring 47, the rotating shaft 43 and the driving roller can be driven to return to the first position; when the rotary shaft 43 is in the first state, the large diameter end of the drive roller 42 abuts against the auxiliary roller 46 or the small diameter end abuts against the auxiliary roller 46.
The limiting assembly 44 comprises a disc 441 and two plugs 442 arranged on the surface of the disc 441; the two plugs 442 are respectively positioned at two ends of the diameter of the disc 441, namely the two plugs 442 are interchanged after the disc 441 rotates 180 degrees; the disc 441 is mounted on the end surface of the rotating shaft 43; when the shaft 43 is in the first position, the plug 442 is inserted into the socket of the support bracket 45, and when the shaft 43 is pressed to translate the shaft 43 to the second position, the plug 442 is away from the socket of the support bracket 45.
In order to ensure the stability of the rotation of the rotating shaft 43, a sliding groove 48 parallel to the axis of the rotating shaft 43 is arranged at the bottom of the mounting groove 311; the extension direction of the sliding groove 48 is consistent with the translation direction of the rotating shaft 43; a roller 473 that can slide along the slide groove 48 is attached to the second mounting seat 472 toward the bottom side of the mounting groove 311.
Example II,
Referring to fig. 1-7, the difference between the second embodiment and the first embodiment is that the handle 3 is divided into a mounting section 31 and a holding section 32; the mounting groove 311 is positioned in the mounting section 31; the connecting surface of the mounting section 31 and the holding section 32 is provided with a folded plate 33 sleeved on the outer side; the mounting section 31 is connected with the two folding plates 33 of the holding section 32 through fasteners; the folded plate 33 of the installation section 31 extends from the groove bottom of the installation groove 311 to the notch; the groove bottom plate of the mounting groove 311 is connected with the side wall plate through the countersunk head screw 34, and the detachable connection of the groove bottom plate of the mounting groove 311 and the side wall plate can facilitate the mounting of each part, thereby reducing the production difficulty and the manufacturing cost; a mounting hole extending towards the bottom of the groove is formed in a side wall plate of the mounting groove 311, and a first fastening bolt 35 capable of transversely penetrating through the mounting hole is connected to the side wall plate of the mounting groove 311 in a threaded manner; the micro-catheter tube body 1 is integrally formed with a mounting column 36 inserted into the mounting port; the mounting column 36 is transversely provided with a passage opening through which the first fastening bolt 35 can penetrate, the first fastening bolt 35 penetrates through the mounting column 36 and the side wall of the mounting groove 311, so that the handle 3 is mounted on the outer side of the micro-catheter tube body 1, and when the micro-catheter tube body 1 or the guide wire body 2 needs to be replaced, the handle 3 can be used for multiple times.
Example III,
Referring to fig. 1 to 7, the difference between the third embodiment and the second embodiment is that on the basis of the second embodiment, a second locking mechanism 5 for adjusting the insertion depth of the micro-catheter tube 1 is further included, and the second locking mechanism 5 is slidably sleeved on the outer side of the micro-catheter tube 1; the second locking mechanism 5 comprises an adhesive block 51 for adhering to the skin surface and a clasping component 52 mounted on the back of the adhesive block 51 for inhibiting the microcatheter tube 1 from sliding back and forth in the transverse direction, wherein the transverse movement of the clasping component 52 refers to the axial direction of the microcatheter tube 1.
The holding components 52 are at least two and are uniformly distributed on the peripheral surface of the micro-catheter tube body 1; the clasping component 52 comprises a clasping block 521, a fixing block 522, a lifting column 523 and a locking column 524; the fixing block 522 is installed on the back of the sticking block 51; the fixed block 522 is provided with a lifting hole facing the micro catheter body 1; the lifting column 523 penetrates through a lifting hole, and the tail part of the lifting column is connected with the enclasping block 521; the circumferential surface of the lifting column 523 is provided with a second locking hole 525, and the second locking hole 525 is a blind hole and is positioned in the radial direction of the lifting column 523; the fixed block 522 is provided with a sliding hole which is opposite to the lifting column 523 and communicated with the lifting hole; the locking column 524 is slidably connected in the sliding hole, and the tail part can be inserted into the second locking hole 525; a baffle plate is arranged at the position, close to the tail, of the locking column 524; a third return spring 526 is connected between the baffle plate and the inner wall of the sliding hole; the third return spring 526 is positioned in the sliding hole and is wound outside the locking column 524; a fourth return spring 527 sleeved outside the lifting column 523 is arranged between the clasping block 521 and the fixed block 522; the third return spring 526 is arranged, so that when the lifting column 523 slides in the lifting hole, when the second locking hole 525 is opposite to the sliding hole, the locking column 524 can be automatically inserted into the second locking hole 525, and after the locking column 524 is inserted into the second locking hole 525, the clasping block 521 abuts against the outer peripheral surface of the micro catheter tube 1; the locking post 524 is pulled outward to disengage the locking post 524 from the second locking hole 525, and the clasping block 521 is now moved away from the microcatheter tube 1 by the fourth return spring 527.
The working process of the invention is as follows: the sticking block 51 is stuck to the outer side of the minimally invasive opening of the patient, the medical staff operates the micro catheter tube body 1, the micro catheter tube body 1 is inserted into the minimally invasive opening, after the micro catheter tube body 1 reaches a specified depth, the lifting column 523 is pressed towards the side where the micro catheter tube body 1 is located, after the micro catheter tube body is pressed in place, the locking column 524 is clamped in the second locking hole 525, and the clasping block 521 abuts against the periphery of the micro catheter tube body 1 to prevent the micro catheter tube body 1 from moving; the medical staff operates the guide wire body 2, when the guide wire body 2 reaches a specified depth, the rotating shaft 43 is pressed to enable the rotating shaft 43 to translate from the first position to the second position, and after the rotating shaft is pressed to the place, the limiting assembly 44 is separated from the supporting frame 45; the rotating shaft 43 is rotated by 180 degrees, at the moment, the driving roller 42 synchronously rotates by 180 degrees, and the insertion bullet 41 is driven to move upwards in the rotating process, so that the gear shaping 414 is clamped in the limiting groove 21 to limit the movement of the guide wire body 2, the pressing on the rotating shaft 43 is released, the rotating shaft 43 automatically returns to the first position from the second position under the action of the second return spring 47, and the limiting assembly 44 is inserted into the socket of the support frame 45; when the position limitation of the guide wire body 2 needs to be removed, the rotating shaft 43 is pressed again, the rotating shaft 43 is enabled to translate from the first position to the second position, after the limiting assembly 44 is pressed in place, the supporting frame 45 is separated from the limiting assembly, the rotating shaft 43 rotates 180 degrees again, the driving roller 42 rotates 180 degrees synchronously at the moment, the pressing on the rotating shaft 43 is released, the insertion bullet 41 is driven by the first return spring 413 to descend, the limitation of the guide wire body 2 is removed, and after the insertion bullet 41 descends in place, the rotating shaft 43 returns to the first position under the action of the second return spring 47 again.
It should be noted that the terms "upper, lower, left, right, inner and outer" in the present invention are defined based on the relative positions of the components in the drawings, and are only used for clarity and convenience of the technical solution, and it should be understood that the application of the terms of orientation does not limit the scope of the present application.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (9)
1. A medical adjustable microcatheter, comprising:
the micro catheter comprises a micro catheter tube body, a micro catheter tube body and a micro catheter, wherein a guide wire body capable of moving back and forth along the axis of the micro catheter tube body is arranged in the micro catheter tube body in a penetrating manner; the circumferential surface of one end of the micro catheter body is provided with a first locking hole; a plurality of annular limiting grooves are formed in the end part, close to the locking hole, of the guide wire body;
the handle is used for holding by medical staff, is detachably arranged on the outer peripheral surface of the micro catheter tube body and covers the first locking hole, and the top of the handle is provided with an installation groove;
the first locking mechanism is arranged in the mounting groove of the handle and used for locking the insertion depth of the guide wire body; the first locking mechanism comprises an insertion bullet, a driving roller, a rotating shaft, a supporting frame and a limiting component; the inserting bullet can ascend and descend along the first locking hole, the head of the inserting bullet is provided with a gear shaping matched with the limiting groove, and the tail of the inserting bullet is connected with an auxiliary roller capable of rolling; the driving roller is horizontal, and the peripheral surface of the driving roller is abutted against the surface of the auxiliary roller; the rotating shaft is eccentrically penetrated through a driving roller, and after the rotating shaft is rotated, the driving roller eccentrically rotates by taking the rotating shaft as a center so as to drive the auxiliary roller to move towards the first locking hole; one end of the rotating shaft is erected on the supporting frame, and the other end of the rotating shaft extends out of the outer side of the handle; the limiting assembly is arranged at the end part of the rotating shaft close to the support frame and can be clamped or far away from the support frame; the rotating shaft can drive the driving roller to transversely translate, and when the rotating shaft is located at the first position, the limiting assembly is clamped with the supporting frame to restrain the rotating shaft from rotating; when the rotating shaft transversely translates to the second position, the limiting assembly deviates from the supporting frame so as to remove the limitation on the rotation of the rotating shaft.
2. The adjustable microcatheter of claim 1, wherein a connecting bracket is mounted on the insertion bullet; a guide rod capable of enabling the connecting support to slide is arranged on the inner wall of the limiting groove; a first return spring is arranged between the guide rod and the connecting support, and when the first return spring is in an initial state, the gear shaping is far away from the limiting groove.
3. The adjustable microcatheter of claim 1, wherein the first locking mechanism further comprises a second return spring, a first mounting seat, a second mounting seat; the second return spring is connected between the first mounting seat and the second mounting seat and sleeved outside the rotating shaft; the first mounting seat is mounted on the inner wall of the mounting groove, the second mounting seat is rotatably connected to the rotating shaft, and the rotating shaft is located at the first position when the second return spring is in the initial state.
4. The adjustable microcatheter of claim 3, wherein a slide groove parallel to the axis of the rotation shaft is installed at the bottom of the mounting groove; and the second mounting seat is provided with a rolling wheel which can slide along the sliding groove towards the bottom side of the mounting groove.
5. The adjustable microcatheter of claim 1, wherein the stop assembly comprises a disk and two prongs disposed on a surface of the disk; the two plugs are respectively positioned at two ends of the diameter of the disc; the disc is arranged on the end surface of the rotating shaft; when the rotating shaft is located at the first position, the plug is inserted into the socket of the support frame.
6. The adjustable microcatheter of claim 1, wherein the number of the cogs is less than the number of the retaining grooves.
7. The adjustable microcatheter according to any one of claims 1-6, wherein the handle is divided into a mounting section and a gripping section; the mounting groove is positioned in the mounting section; the joint surfaces of the mounting section and the holding section are provided with folded plates sleeved on the outer sides; the mounting section is connected with the two folded plates of the holding section through fasteners; the folded plate of the mounting section extends from the groove bottom of the mounting groove to the notch; the groove bottom plate and the side wall plate of the mounting groove are connected through countersunk screws; the side wall plate of the mounting groove is provided with a mounting hole extending towards the bottom of the groove, and the side wall plate of the mounting groove is in threaded connection with a first fastening bolt capable of transversely penetrating through the mounting hole; the micro-catheter tube body is integrally formed with a mounting column inserted into the mounting port; the mounting column is transversely provided with a passage opening through which the first fastening bolt can penetrate.
8. The adjustable microcatheter of claim 7, further comprising a second locking mechanism for adjusting the insertion depth of the body of the microcatheter, said second locking mechanism slidably engaging the outside of the body of the microcatheter; the second locking mechanism comprises an adhesive block adhered to the surface of the skin and a holding component arranged on the back of the adhesive block and used for inhibiting the micro-catheter tube from sliding back and forth transversely.
9. The adjustable microcatheter of claim 8, wherein the clasping members are at least two and are uniformly distributed on the outer circumferential surface of the microcatheter tube body; the clamping assembly comprises a clamping block, a fixed block, a lifting column and a locking column; the fixed block is arranged on the back of the sticking block; the fixed block is provided with a lifting hole facing the micro catheter body; the lifting column penetrates through the lifting hole, and the tail part of the lifting column is connected with the clasping block; the peripheral surface of the lifting column is provided with a second locking hole; the fixed block is provided with a sliding hole which is opposite to the lifting column and communicated with the lifting hole; the locking column is connected in the sliding hole in a sliding mode, and the tail part of the locking column can be inserted into the second locking hole; a baffle is arranged at the position, close to the tail part, of the locking column; a third return spring is connected between the baffle and the inner wall of the sliding hole; the third return spring is positioned in the sliding hole and wound outside the locking column; and a fourth return spring sleeved outside the lifting column is arranged between the clasping block and the fixed block.
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