CN117281584A - Ultra-minimally invasive instrument with adjustable force arm and effective working length - Google Patents
Ultra-minimally invasive instrument with adjustable force arm and effective working length Download PDFInfo
- Publication number
- CN117281584A CN117281584A CN202311454135.0A CN202311454135A CN117281584A CN 117281584 A CN117281584 A CN 117281584A CN 202311454135 A CN202311454135 A CN 202311454135A CN 117281584 A CN117281584 A CN 117281584A
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- CN
- China
- Prior art keywords
- connecting rod
- minimally invasive
- ultra
- working length
- invasive instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 238000002324 minimally invasive surgery Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 210000000683 abdominal cavity Anatomy 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007912 intraperitoneal administration Methods 0.000 description 1
- 238000002357 laparoscopic surgery Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B17/2909—Handles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2901—Details of shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
Abstract
The invention discloses an ultra-minimally invasive instrument with an adjustable arm of force and an effective working length, which comprises a first connecting rod, a second connecting rod, a third connecting rod and a traction piece, wherein the two ends of the first connecting rod are communicated, one end of the first connecting rod is connected with a clamp head through threads, the other end of the first connecting rod is connected with a handheld part through threads, the third connecting rod is arranged between the first connecting rod and the second connecting rod, the relative positions between the third connecting rod and the first connecting rod and the second connecting rod can be adjusted along the axial direction, at least one position of the third connecting rod can be fixed with the first connecting rod or the second connecting rod, one section of the traction piece is connected with the clamp head through threads, and the other section of the traction piece is connected with a clamping groove of the handheld part. Through the improvement of the invention, the arm of force and the working length of the instrument can be effectively changed, thereby truly realizing the purpose of minimally invasive surgery.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an ultra-minimally invasive instrument with an adjustable arm of force and an effective working length.
Background
The prior application (202321713855X) (2023214351722) (2023211979585) of the applicant discloses that the proposed laparoscopic surgical instrument can be disassembled, and the assembly of the instrument is completed in the abdominal cavity, so that the purpose of laparoscopic minimally invasive surgery is achieved. In practical experiments, it was found that when the vector bearing force of the connecting rod of the surgical instrument reached 5N; the risk of bending occurs when the length of the connecting rod exceeds 180mm, and the situation of breakage occurs when the length reaches 240 mm. Current surgical instruments may therefore present an uncontrolled instrument risk for certain specific patients while performing surgery. There is therefore a need for improved designs of existing instruments.
Disclosure of Invention
The invention aims to design a novel laparoscopic surgical instrument, and the purpose of rapid assembly in and out of the abdominal cavity is achieved, so that the purpose of minimally invasive surgery is achieved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an ultra-minimally invasive instrument with an adjustable force arm and an effective working length comprises a clamping part, a connecting part and a handheld part which can be mutually detached, wherein the connecting part comprises a first connecting rod, a second connecting rod and a traction piece, the two ends of the first connecting rod are communicated, one end of the first connecting rod is connected with a clamp head through threads, the other end of the first connecting rod passes through the handheld part to be connected with the handheld part in a buckling way, one end of the second connecting rod is connected with the handheld part through threads,
a third connecting rod is arranged between the first connecting rod and the second connecting rod, the third connecting rod can axially adjust the relative positions between the third connecting rod and the first connecting rod and between the third connecting rod and the second connecting rod, at least one position of the third connecting rod can be fixed with the first connecting rod or the second connecting rod,
the traction piece axially penetrates through the first connecting rod, the second connecting rod and the third connecting rod, one end of the traction piece is connected with the forceps of the forceps head through threads, and the other end of the traction piece is connected with the traction end of the handheld portion.
In the above technical scheme, the third connecting rod can slide in the second connecting rod, and the third connecting rod can slide on the surface of the first connecting rod.
In the above technical scheme, a locking member is arranged at the end part of the second connecting rod, which is contacted with the third connecting rod.
In the above technical scheme, a locking member is arranged at the end part of the third connecting rod, which is contacted with the first connecting rod.
In the above technical scheme, a locking member is arranged on the end portion of the second connecting rod, which is in contact with the third connecting rod, and a locking member is arranged on the end portion of the third connecting rod, which is in contact with the first connecting rod.
In the above technical scheme, a locking member is arranged between the first connecting rod and the clamp head.
In the technical proposal, the locking piece comprises a screw cap and a compression ring arranged in the screw cap,
when the screw cap is in threaded connection with the end part of the second connecting rod, the compression ring is sleeved on the third connecting rod, and one end of the compression ring is arranged in the second connecting rod;
when the nut is in threaded connection with the end part of the third connecting rod, the compression ring is sleeved on the first connecting rod, and one end of the compression ring is arranged in the third connecting rod. .
In the technical scheme, the end face, which is in contact with the compression joint ring, in the nut is a conical slope.
In the above technical scheme, the external dimension of the third connecting rod is not greater than the external dimension of the forceps head connecting part.
In the above technical scheme, the diameter of the first connecting rod is not more than 3mm.
In the above technical scheme, be provided with two archs on the body of rod of head rod, recess and the elasticity bolt buckle that sets up on handheld portion between two archs.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
through the mode of multistage connecting rod connection, can be under the condition that does not change connecting rod size and dimension structure to change the arm of force and the working length of connecting rod, thereby realize the minimally invasive surgery purpose in the true sense.
There is evidence in clinic that wounds with diameters less than 2mm will not leave scars on patients, and the first connecting rod in this embodiment has diameters less than 2mm, but the instrument vector bearing force less than 2mm is limited, which is inversely related to the moment arm. The utility model provides a clinical need not the apparatus bear very big vector atress in many times, this scheme increases the length of head rod atress through sliding third connecting rod, the length of head rod has decided the length of apparatus at intraperitoneal work, thereby the flexibility of apparatus in the abdominal cavity has been improved, when it bears bigger vector gravity to need, shorten head rod length can satisfy clinical demand, can cover the head rod completely with the third connecting rod that the diameter is coarser when the apparatus is maintained transportation maintenance, can improve apparatus life by a wide margin, third connecting rod is the same with the binding clip diameter, can become conventional laparoscopic 5mm apparatus use when it covers the head rod completely, only need prepare a small amount of apparatuses like this, rethread various specification binding clip, can make the apparatus quantity of operating room disinfection packing reduce by a wide margin, the apparatus cost is saved and the space of depositing the apparatus, can obviously improve the operation benefit.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic overall construction;
FIG. 2 is a schematic view of the structure of the portion A in FIG. 1;
FIG. 3 is a schematic view of the structure of portion B of FIG. 1;
FIG. 4 is a schematic structural view of a hand-held portion;
FIG. 5 is a schematic view of the structure of portion C of FIG. 1;
FIG. 6 is a schematic view of the attachment of the locking member;
FIG. 7 is a schematic diagram of an embodiment;
wherein: 1 is a clamp head, 2 is a traction piece, 3 is a first connecting rod, 3-1 is a bulge, 3-2 is a groove, 4 is a third connecting rod, 5 is a second connecting rod, 6 is a locking piece, 6-1 is a locking nut, 6-2 is a crimping ring, 7 is a hand-held part, and 8 is an elastic bolt.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
As shown in fig. 1, the laparoscopic surgical instrument of the present embodiment is substantially identical to the conventional instrument in terms of external configuration, and the main difference is that the jaw portion at the front end and the connecting rod portion are designed as separate structures, and the connecting rod portion and the hand-held portion at the rear end are designed as separate portions.
As shown in fig. 2, in the forceps head 1 of this embodiment, a screw hole is provided on the forceps head 1, a first connecting rod 3 is connected with the screw hole through a thread, a traction member 2 is disposed in the first connecting rod 3, one end of the traction member 2 is in threaded connection with the forceps, and the forceps can be turned on or turned off by traction of the traction member 2.
As shown in fig. 3 and 4, the main improvement point of the present embodiment is to add a movable connecting rod on the basis of the conventional laparoscopic surgical instrument, thereby realizing the possibility of changing the moment arm by adjusting. One end of the second connecting rod 5 is fixedly connected with the front end of the hand-held end 7 through threads, one end of the first connecting rod 3 is fixedly connected with the clamp head 1, the other end of the first connecting rod 3 penetrates through the second connecting rod 5 and then penetrates into the rear end of the hand-held portion 7 to be connected with a handle clamping groove, and the traction piece 2 penetrates through the rear end of the first connecting rod 3 to be detachably connected with the traction end of the hand-held portion 7.
As shown in fig. 5, a protrusion 3-1 is provided on the rod body of the first connecting rod 3, a groove 3-2 is formed between the two protrusions 3-1, an elastic plug 8 is provided at the rear end of the hand-holding portion 7, a through hole is provided on the elastic plug 8, and the first connecting rod 3 passes through the through hole, because the elastic plug 8 makes the groove 3-2 and the through hole mutually locked by the acting force of the spring, the groove 3-2 can be separated from the through hole only when the elastic plug 8 is pressed by the external force, thereby completing the position change of the first connecting rod 3 and the elastic plug 8, and the elastic plug 8 realizes the position fixation of the first connecting rod 3.
A third connecting rod 4 capable of sliding is coaxially arranged between the first connecting rod 3 and the second connecting rod 5, and two ends of the third connecting rod 4 are communicated. The structure is equivalent to that the first connecting rod 3 coaxially passes through the third connecting rod 4, and the third connecting rod 4 coaxially passes through the second connecting rod again. Because of the inherent structure of the laparoscopic surgical instrument, the relative position and length of the first connecting rod 3 are fixed, and thus, by changing the positional relationship of the third connecting rod 4 with respect to the first connecting rod 3, the moment arm of the first connecting rod 4 with respect to the entire surgical instrument can be changed.
In the above-mentioned connection structure, the first connecting rod 3, the second connecting rod 5 and the third connecting rod 4 are all hollow structures with two ends being communicated, and the three connecting rods are all communicated along the axis, so after the three connecting rods are mutually connected, the communicated hollow structures are the same axis, so that the traction piece 2 can sequentially pass through the first connecting rod 3, the third connecting rod 4 and the second connecting rod 5 and then be connected with the traction end of the rear end of the hand-held part, and the traction through the hand-held part drives the surgical forceps switch to be closed.
When the third connecting rod 4 is in a completely contracted state, as shown in the structure of fig. 7, the diameter of the first connecting rod 3 is smaller than 2mm, so that the conventional minimally invasive laparoscopic surgery can be performed. When the third connecting rod 4 is in a fully extended state, as shown in fig. 1, the third connecting rod 4 fully wraps the first connecting rod 3 after being extended, and the external dimension of the third connecting rod 4 is consistent with the dimension of the clamp head. Thus, even if the diameter of the first connecting rod 3 is smaller than 2mm, the whole surgical instrument can enter human body operation through a normal 5mm laparoscopic channel by wrapping the third connecting rod 4, so that the stress of the first connecting rod 3 is completely borne by the third connecting rod 4. In comparison between the two states of fig. 1 and fig. 6, the radial stress in the surgical instrument is borne by the third connecting rod 4 from the first connecting rod 3, so that the stress of the instrument is increased under the condition that the length of the surgical instrument is not changed, and the risk that the instrument breaks during the 180mm length operation under the condition that the current stress is 5N is solved.
In the surgical instrument in the prior art, the connection relationship between the first connecting rod 3 and the traction piece 2 makes the distance between the forceps head 1 and the hand-holding part 7 constant, and after the second connecting rod 5 is fixedly connected with the hand-holding part 7, the length between the traction piece 2 and the hand-holding part 7 is equal to the length between the first connecting rod 3 and the hand-holding part 7 constant. After the first connecting rod 3 is fixedly connected with the bottom second connecting rod 5, the protection of the traction piece 2 can be realized. However, in this embodiment, a third connecting rod 4 is added between the first connecting rod 3 and the second connecting rod 5, and the third connecting rod 4 is relatively slidable with respect to the first connecting rod 3 and the second connecting rod 5, so that the third connecting rod 4 needs to be fixedly locked. The fixed mode has three states:
state one
A locking piece 6 is arranged at the end part of the second connecting rod 5, and the second connecting rod 5 and the third connecting rod 4 are fixedly locked through the structure of the locking piece 6. The third connecting rod 4 is not fixedly connected with the first connecting rod 3, and in this state, the force transmission of the surgical instrument is mainly concentrated between the first connecting rod 3 and the third connecting rod 4.
State two
A locking piece 6 is arranged at the end part of the third connecting rod 4, and the first connecting rod 3 and the third connecting rod 4 are fixedly locked through the structure of the locking piece 6. The third connecting rod 4 is not fixedly connected with the second connecting rod 5, and in this state, the force transmission of the surgical instrument is mainly concentrated between the third connecting rod 4 and the second connecting rod 5.
State three
A locking piece 6 is arranged at the end part of the second connecting rod 5, and the second connecting rod 5 and the third connecting rod 4 are fixedly locked through the structure of the locking piece 6. A locking piece 6 is arranged at the end part of the third connecting rod 4, and the first connecting rod 3 and the third connecting rod 4 are fixedly locked through the structure of the locking piece 6. In this state, the first connecting rod 3, the second connecting rod 5 and the third connecting rod 4 are connected as a whole, and the connecting rods are not in a force transmission relationship.
The first state and the second state have only one fixed locking position, so that the connection relationship between the two states can realize operation in partial scenes. In the third state, the connecting rods are completely connected into a whole to protect the traction piece 2, and all the stress is born by the whole connecting rods, so that the best mode of the embodiment is in the third state, as shown in fig. 1 and 6.
As shown in fig. 2, in the above three states, in order to ensure that the first connecting rod 3 is not deformed by force, the screw connection pressure with the binding clip 1 is reduced, the sagittal pressure received by the first connecting rod 3 is reduced, the locking member 6 is added between the first connecting rod 3 and the binding clip, and the locking connection between the first connecting rod 3 and the binding clip 1 is reinforced by the pressing locking force of the locking member 6.
As shown in fig. 6, the locking member 6 includes a locking nut 6-1 and a clamp ring 6-2, wherein the clamp ring 6-2 is disposed inside the locking nut 6-1, and when coupled, the clamp ring 6-2 is looped around the third connecting rod 4, one end of the clamp ring 6-2 is inserted into the second connecting rod 5, and then the locking nut 6-1 is screwed to the second connecting rod 5. The contact surface between the lock nut 6-1 and the crimp ring 6-2 is a conical slope, and when the lock nut 6-1 is screwed, the crimp ring 6-2 can be extruded through the conical slope, so that the crimp ring 6-2 is contracted to clamp the third connecting rod 4. The same structure is applied between the third connecting rod 4 and the first connecting rod 3, and can play a role in stabilizing the first connecting rod 3.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. The utility model provides an adjustable arm of force and effective working length's ultra-minimally invasive instrument, includes clamping part, connecting portion and the handheld portion that can dismantle each other, connecting portion include head rod, second connecting rod and the traction element that both ends link up, the one end of head rod pass through the screw thread with the binding clip is connected, and the other end of head rod passes handheld portion and handheld portion buckle to be connected, the one end of second connecting rod passes through the screw thread and is connected with handheld portion, its characterized in that:
a third connecting rod is arranged between the first connecting rod and the second connecting rod, the third connecting rod can axially adjust the relative positions between the third connecting rod and the first connecting rod and between the third connecting rod and the second connecting rod, at least one position of the third connecting rod can be fixed with the first connecting rod or the second connecting rod,
the traction piece axially penetrates through the first connecting rod, the second connecting rod and the third connecting rod, one end of the traction piece is connected with the forceps of the forceps head through threads, and the other end of the traction piece is connected with the traction end of the handheld portion.
2. An adjustable moment arm and effective working length ultra-minimally invasive instrument in accordance with claim 1, wherein the third connecting rod is slidable within the second connecting rod, the third connecting rod being slidable along the first connecting rod surface.
3. An adjustable moment arm and effective working length ultra-minimally invasive instrument in accordance with claim 2, wherein a locking member is provided on an end of the second connecting rod in contact with the third connecting rod.
4. An adjustable moment arm and effective working length ultra-minimally invasive instrument in accordance with claim 2, wherein a locking member is provided on an end of the third connecting rod in contact with the first connecting rod.
5. An adjustable moment arm and effective working length ultra-minimally invasive instrument according to claim 2, wherein: the end part of the second connecting rod, which is contacted with the third connecting rod, is provided with a locking piece, and the end part of the third connecting rod, which is contacted with the first connecting rod, is provided with a locking piece.
6. The ultra-minimally invasive instrument of claim 1, wherein the locking member is disposed between the first connecting rod and the head.
7. An adjustable moment arm and effective working length ultra-minimally invasive instrument according to any of claims 3-6, wherein the retaining member comprises a nut and a compression ring disposed within the nut,
when the screw cap is in threaded connection with the end part of the second connecting rod, the compression ring is sleeved on the third connecting rod, and one end of the compression ring is arranged in the second connecting rod;
when the nut is in threaded connection with the end part of the third connecting rod, the compression ring is sleeved on the first connecting rod, and one end of the compression ring is arranged in the third connecting rod.
8. An adjustable moment arm and effective working length ultra-minimally invasive instrument in accordance with claim 7, wherein the end face of the nut in contact with the crimp ring is a tapered ramp.
9. The adjustable moment arm and effective working length ultra-minimally invasive instrument of claim 1, wherein the third connecting rod has an overall dimension that is no greater than an overall dimension of the jaw attachment.
10. The ultra-minimally invasive instrument of claim 1, wherein the shaft of the first connecting rod has two protrusions, and the recess between the two protrusions engages with a resilient latch disposed on the handle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023226913171 | 2023-10-09 | ||
| CN202322691317 | 2023-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117281584A true CN117281584A (en) | 2023-12-26 |
Family
ID=89257314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311454135.0A Pending CN117281584A (en) | 2023-10-09 | 2023-11-03 | Ultra-minimally invasive instrument with adjustable force arm and effective working length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117281584A (en) |
-
2023
- 2023-11-03 CN CN202311454135.0A patent/CN117281584A/en active Pending
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