CN212066777U - Adjustable retractor for cerebral surgery - Google Patents
Adjustable retractor for cerebral surgery Download PDFInfo
- Publication number
- CN212066777U CN212066777U CN202020370081.5U CN202020370081U CN212066777U CN 212066777 U CN212066777 U CN 212066777U CN 202020370081 U CN202020370081 U CN 202020370081U CN 212066777 U CN212066777 U CN 212066777U
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- clamping pieces
- retractor
- grooves
- different
- bending
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- 238000001356 surgical procedure Methods 0.000 title claims abstract description 16
- 230000002490 cerebral effect Effects 0.000 title abstract description 5
- 238000005452 bending Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 210000004556 brain Anatomy 0.000 claims description 16
- 208000029028 brain injury Diseases 0.000 abstract description 3
- 241000405070 Percophidae Species 0.000 abstract 1
- 210000005013 brain tissue Anatomy 0.000 description 8
- 230000006378 damage Effects 0.000 description 3
- 210000004247 hand Anatomy 0.000 description 3
- 210000003811 finger Anatomy 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 206010048962 Brain oedema Diseases 0.000 description 1
- 240000007643 Phytolacca americana Species 0.000 description 1
- 235000009074 Phytolacca americana Nutrition 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 206010063837 Reperfusion injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000006931 brain damage Effects 0.000 description 1
- 231100000874 brain damage Toxicity 0.000 description 1
- 208000006752 brain edema Diseases 0.000 description 1
- 210000003710 cerebral cortex Anatomy 0.000 description 1
- 206010008118 cerebral infarction Diseases 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007917 intracranial administration Methods 0.000 description 1
- 230000008338 local blood flow Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002739 subcortical effect Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model relates to an adjustable retractor for cerebral surgery. Aims to provide a retractor which can finely control and adjust the opening and reduce the brain injury. The pliers comprise two clamping pieces which are connected together at the tail part and form a herringbone shape to form a pliers body, wherein the middle parts of the two clamping pieces are respectively provided with an inward first bending to form an upper and a lower different-surface crossed clamping pieces, an outward second bending is arranged on the two different-surface crossed clamping pieces after the second bending, the two different-surface crossed clamping pieces after the second bending are mutually parallel and superposed, the front end parts of the two different-surface crossed clamping pieces are fixedly provided with involutory duckbill distraction plates, the two clamping pieces close to the first bending are respectively provided with symmetrical through grooves, a spiral adjusting mechanism for opening and closing the two distraction plates is arranged in the through grooves, the spiral adjusting mechanism comprises an adjusting wheel, two ends of the center of the adjusting wheel are respectively fixedly provided with screw rods with opposite thread turning directions, the two screw rods are respectively inserted into the two through grooves, and corresponding nuts are screwed on the screw rods extending out of the outer surfaces of the clamping pieces.
Description
Technical Field
The utility model relates to a medical instrument, in particular to an adjustable retractor for cerebral surgery.
Background
When neurosurgery is operated in the brain, the brain tissue is inevitably required to be separated and drawn, and the reasonable use of the surgical instrument plays an important role in protecting the brain tissue. The brain retractor is widely applied in neurosurgery and becomes one of important micro neurosurgical instruments, if continuous and unbalanced pulling force is generated on brain tissue in the separation and pulling processes, the extrusion damage of local cerebral cortex and subcortical tissue and the local blood flow reduction can be caused, so that the perfusion reduction and the reperfusion injury can be caused, and the damage of the local brain tissue can be further aggravated, so that the vicious circle can be formed.
The traditional instrument for separating and retracting brain tissues is a brain pressing plate, two hands are required to be occupied when the brain tissues are separated, an operator cannot perform other operations, two hands or two automatic draw hooks are also required when the brain tissues are retracted, the drawing force is controlled differently, unnecessary injuries such as brain injury, cerebral infarction and cerebral edema are possibly caused by excessive drawing in the separation and drawing processes, and the drawing force is more difficult to control under the condition of higher intracranial pressure. In the existing retractors, although some retractors can be operated by one hand, no adjusting device for retracting distance exists, and an operator still needs to hold the retractors by himself during an operation, so that the control of the pulling force is uneven. Although the existing brain automatic retractor can release both hands of a surgeon, the device is complicated, heavy and expensive, and is easy to block the sight, thereby causing operation blind areas, even directly damaging nerves and blood vessels and increasing postoperative complications. Therefore, unlike the conventional retractor, the retractor for brain surgery requires a relatively high degree of opening accuracy for retraction, requires fine opening adjustment and opening fixation, and requires excellent fitting with the operator.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a retractor's aperture can carry out the control that becomes more meticulous and adjust, simple structure, manufacturing and convenient to use, and the art person of being convenient for is wild effectively exposes, helps reducing brain damage's a retractor for brain surgery with adjustable.
In order to meet the requirements, the utility model discloses a realize through following technical scheme: the special pliers are characterized by comprising two clamping pieces which are connected together at the tail part and form a herringbone shape to form a pliers body, wherein the middle parts of the two clamping pieces are respectively provided with an inward first bending to form an upper and a lower different-surface crossed clamping pieces, an outward second bending is arranged on the two different-surface crossed clamping pieces after the second bending, the two different-surface crossed clamping pieces after the second bending are mutually parallel and superposed, the front end parts of the two different-surface crossed clamping pieces are fixedly provided with involutive duckbill-shaped distraction plates, the two clamping pieces close to the first bending are respectively provided with symmetrical through grooves, a spiral adjusting mechanism for opening and closing the two distraction plates is arranged in the through grooves, the spiral adjusting mechanism comprises an adjusting wheel, two ends of the center of the adjusting wheel are respectively fixedly provided with screw rods with opposite thread turning directions, the two screw rods are respectively inserted into the two through grooves, and corresponding nuts are screwed on the screw rods extending out of the outer surfaces of the clamping pieces.
In order to prevent the screw and the nut from following rotation, the outer surfaces of the two clamping pieces of the through groove are provided with concave pit grooves with the width larger than that of the through groove, the end surface of the nut is provided with a lug boss matched with the width of the pit grooves, and the lug boss is embedded in the pit grooves to prevent the nut from rotating.
The end surfaces of the two sides of the boss are inclined surfaces which are matched with the inclination when the clamping piece is opened.
The length of the pulling plate is 20-100 mm.
The included angle between the pulling plate and the pincer body is 90-150 degrees.
The width of the out-of-plane crossing clip is half of the width of the clip.
The outer circumferential surface of the adjusting wheel is provided with straight grains or crossed grains or notches for increasing friction force.
When the adjustable retractor for the cerebral surgery is used, the retracting plate is inserted into a tissue to be retracted, the thumb and the middle finger of one hand of an operator are used for holding the forceps body, the middle finger of the hand slightly pokes the adjusting wheel to drive the screw rod to rotate, the nuts at the two ends of the screw rod press the left clamping piece and the right clamping piece to approach towards the middle along with the rotation of the screw rod, the two retracting plates on the opposite-surface crossed clamping pieces are slowly unfolded towards the left side and the right side, and the tissue outside the retracting plates is pulled. Because the opening degree of the retracting plate is adjusted through the screw thread, the retracting degree can be very fine, and the retracting plate completely conforms to the operation of brain surgery. When the retractor is used, one-hand operation and control can be realized, once the retractor is retracted, the stability of the retraction opening and the balance of the retraction force can be kept according to the operation condition, an operator does not need to control the retraction force and the retraction opening by himself or herself, and fine and accurate adjustment can be performed at any time according to the operation requirement. The utility model has the advantages of convenient use, labor saving, small trauma to brain tissue, simple structure, convenient manufacture and low cost in brain surgery.
Drawings
Fig. 1 is a front view of an adjustable retractor for brain surgery;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is an enlarged partial view of region H of FIG. 1;
FIG. 4 is a view from direction K of FIG. 1;
FIG. 5 is a cross-sectional view taken at the location F-F in FIG. 3;
FIG. 6 is a front view of the nut;
FIG. 7 is a top view of FIG. 6;
fig. 8 is an end view of the adjustment wheel.
In the figure: 1. a clip; 2. a clamp body; 3, first bending; 4. a non-coplanar crossed clamping piece; 5. intersection points of different planes; 6. second bending; 7, pulling the plate; 8, a through groove; 9. a screw adjustment mechanism; 10. an adjustment wheel; a screw rod; 12. a nut; 13. sinking a pit; 14. a boss; 15. a bevel; 16. straight lines or cross lines; 17. and (4) notching.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Fig. 1, fig. 2, fig. 3 and fig. 4 are schematic structural views of an adjustable retractor for brain surgery. The pliers comprise two clamping pieces 1 which are connected together at the tail part and form a herringbone, a pliers body 2 is formed, the middle parts of the two clamping pieces 1 are respectively provided with an inward first bend 3 to form upper and lower different-surface crossed clamping pieces 4, a different-surface intersection point 5 is crossed, the two different-surface crossed clamping pieces 4 are also provided with an outward second bend 6, the two different-surface crossed clamping pieces 4 after the second bends 6 are mutually parallel and overlapped, namely the original left clamping piece 1 is the different-surface crossed clamping piece 4 from the right side, and the original right clamping piece 1 is the different-surface crossed clamping piece 4 from the left side, and the width of the different-surface crossed clamping piece 4 is half of the clamping piece width B. The front end parts of the two opposite-surface crossed clamping pieces 4 are fixed with involutory duckbill-shaped retracting plates 7, the length L of the retracting plates 7 is 20-100 mm, such as 40 mm, 60 mm, 80 mm and the like, and the included angle A between the retracting plates and the forceps body is 90-150 degrees, such as 90 degrees, 120 degrees, 135 degrees and the like. Two clamping pieces 1 close to the first bend 3 are respectively provided with symmetrical through grooves 8, a spiral adjusting mechanism 9 for opening and closing the two clamping pieces 1 is arranged in each through groove 8, each spiral adjusting mechanism 9 comprises an adjusting wheel 10, two ends of the center of each adjusting wheel 10 are respectively fixed with a screw rod 11 with opposite thread turning directions, the two screw rods 11 are respectively inserted into the two through grooves 8, and a corresponding nut 12 is screwed on the screw rod 11 extending out of the outer surface of each clamping piece 1. In order to prevent the screw 11 and the nut 12 from following, a concave pit groove 13 with a width larger than that of the through groove 8 is formed on the outer surfaces of the two clamping pieces 1 of the through groove 8, as shown in fig. 4 and 5, a boss 14 matched with the width E of the pit groove 13 is formed on the end surface of the nut 12, and the boss 14 is embedded in the pit groove 13 to prevent the nut 12 from rotating. The end surfaces of the two sides of the boss 14 are inclined surfaces 15 which are matched with the inclination of the clip 1 when the clip is opened, as shown in fig. 6 and 7. In order to increase the friction when the adjustment wheel 10 is pulled, straight or cross-striations 16 or notches 17 are made on the outer circumferential surface of the adjustment wheel 10 as shown in fig. 8.
However, the above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. An adjustable retractor for brain surgery, which is characterized by comprising two clamping pieces which are connected together at the tail part and form a human shape to form a forceps body, the middle parts of the two clamping pieces are respectively provided with an inward first bend to form an upper and a lower different-surface crossed clamping pieces passing through a different-surface intersection point, the two different-surface crossed clamping sheets are also provided with outward second bends, the two different-surface crossed clamping sheets after the second bends are mutually parallel and overlapped, the front end parts of the two different-surface crossed clamping pieces are fixed with involutory duckbill-shaped retracting plates, two clamping pieces near the first bending are respectively provided with symmetrical through grooves, the screw adjusting mechanism comprises an adjusting wheel, two ends of the center of the adjusting wheel are respectively fixed with screw rods with opposite thread turning directions, the two screw rods are respectively inserted into the two through grooves, and corresponding nuts are screwed on the screw rods extending out of the outer surfaces of the clamping pieces.
2. The adjustable retractor for brain surgery as claimed in claim 1, wherein in order to prevent the screw from following the nut, concave crater grooves with a width larger than that of the through groove are formed on the outer surfaces of the two clamping pieces of the through groove, and bosses matching with the width of the crater grooves are formed on the end surface of the nut and are embedded in the crater grooves to prevent the nut from rotating.
3. The adjustable retractor as claimed in claim 2, wherein the end surfaces of the two sides of the protrusion are inclined surfaces corresponding to the inclination of the clip when the clip is spread.
4. The adjustable retractor for brain surgery of claim 1, wherein the length of the retractor plate is 20-100 mm.
5. The adjustable retractor for brain surgery as defined in claim 1, wherein the angle between the retractor plate and the forceps body is 90-150 °.
6. The adjustable brain surgical retractor of claim 1, wherein the width of the said cross clip is one half of the width of the clip.
7. The adjustable retractor for brain surgery as claimed in claim 1, wherein the outer circumferential surface of the adjustment wheel is formed with straight lines or cross lines or notches for increasing friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020370081.5U CN212066777U (en) | 2020-03-22 | 2020-03-22 | Adjustable retractor for cerebral surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020370081.5U CN212066777U (en) | 2020-03-22 | 2020-03-22 | Adjustable retractor for cerebral surgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212066777U true CN212066777U (en) | 2020-12-04 |
Family
ID=73561801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020370081.5U Expired - Fee Related CN212066777U (en) | 2020-03-22 | 2020-03-22 | Adjustable retractor for cerebral surgery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212066777U (en) |
-
2020
- 2020-03-22 CN CN202020370081.5U patent/CN212066777U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201204 |