CN107874816B - Circumcision device - Google Patents
Circumcision device Download PDFInfo
- Publication number
- CN107874816B CN107874816B CN201711289181.4A CN201711289181A CN107874816B CN 107874816 B CN107874816 B CN 107874816B CN 201711289181 A CN201711289181 A CN 201711289181A CN 107874816 B CN107874816 B CN 107874816B
- Authority
- CN
- China
- Prior art keywords
- circumcision
- ring
- shell
- foreskin
- outer ring
- 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.)
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- 210000003953 foreskin Anatomy 0.000 claims abstract description 67
- 238000005520 cutting process Methods 0.000 claims abstract description 36
- 238000010304 firing Methods 0.000 claims description 30
- 210000001503 joint Anatomy 0.000 claims description 3
- 206010030113 Oedema Diseases 0.000 abstract description 6
- 208000002193 Pain Diseases 0.000 abstract description 5
- 208000015181 infectious disease Diseases 0.000 abstract description 5
- 230000002980 postoperative effect Effects 0.000 abstract description 5
- 210000003899 penis Anatomy 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 208000028867 ischemia Diseases 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 206010067268 Post procedural infection Diseases 0.000 description 1
- 208000004550 Postoperative Pain Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 206010034878 phimosis Diseases 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
- A61B17/32—Surgical cutting instruments
- A61B17/326—Circumcision apparatus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
- A61B17/1155—Circular staplers comprising a plurality of staples
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0023—Surgical instruments, devices or methods, e.g. tourniquets disposable
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pathology (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a circumcision device capable of accurately cutting, which comprises a circumcision fixing ring and a circumcision part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing an everting foreskin covered by the inner ring, the circumcision part is detachably connected with the outer ring, and the circumcision part is used for suturing and cutting the foreskin. The foreskin anastomat can realize disposable cutting while accurately positioning the foreskin cutting length, thereby effectively reducing the occurrence of postoperative edema, pain and infection of patients while ensuring beautiful incision.
Description
Technical Field
The invention relates to a medical surgical instrument, in particular to a circumcision cutter.
Background
Circumcision refers to the excision of redundant foreskin on the penis, so that the glans is exposed, and the prepuce circumcision is an effective treatment method for treating phimosis, overlong foreskin and preventing complications thereof. Currently, there are numerous medical devices for circumcision, two of which are commercially available and circumcision devices, respectively. The circumcision device directly resects redundant foreskin and performs suturing, the operation time is short, about 5-10 minutes, the postoperative pain, infection and edema occurrence rate is low, but the existing circumcision device mostly adopts a glans penis seat to stretch into the inside of the foreskin to fix the foreskin and then performs excision, and the foreskin is opaque, so that the actual cutting length of the foreskin cannot be determined, the distance between the inner plate and the outer plate of the foreskin at the predicted excision position and the coronary sulcus is not clear, and the aesthetic property of the foreskin after the foreskin excision operation is reduced. When the commercial ring is used for circumcision, the commercial ring inner ring is firstly placed, then the outer wrapper is turned outwards, the commercial ring outer ring is placed, tissue ischemia necrosis is forced by utilizing the pressure of the inner ring and the outer ring, then the tissue ischemia necrosis is naturally fallen off, the length of the commercial ring for circumcision is accurate, but the commercial ring needs to be kept on the penis for a long time, generally 7-14 days, and the postoperative edema, pain and infection incidence rate are high.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a circumcision cutter capable of accurately cutting.
In order to achieve the above purpose, the invention adopts the following technical scheme: the circumcision device comprises a circumcision fixing ring and a circumcision part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing the circumcision coated with the inner ring, the circumcision part and the outer ring are detachably connected, and the circumcision part is used for suturing and cutting the circumcision.
Preferably, the circumcision joint part comprises a first shell, the first shell is provided with a buckle, the outer ring is provided with a clamping groove, and the buckle is inserted into the clamping groove to enable the circumcision joint part to be detachably clamped with the outer ring.
Preferably, the circumcision joint part comprises a second shell, a firing part and a rotating piece, wherein the firing part is connected with the second shell, and the rotating piece is arranged in the first shell and sleeved on the second shell in an outer sleeved mode and is used for pushing the second shell to compress and thin the foreskin.
Preferably, the circumcision joint part further comprises a first shell, a second shell, a firing part and a rotary handle, wherein the first shell wraps the second shell and the firing part, the tail of the first shell is in threaded connection with the rotary handle, and the rotary handle is in butt joint with the firing part and is used for rotationally pushing the firing part and the second shell to compress and thin the foreskin.
Preferably, a foreskin cutting and suturing assembly is arranged in the second shell and comprises a knife anvil ring for cutting foreskin and a nail bin ring for suturing foreskin, and suturing nails are arranged in the nail bin ring.
Preferably, the circumcision part is further provided with a firing handle, and the firing handle can drive the firing part to fire the foreskin cutting and suturing assembly to suture and cut the foreskin.
Preferably, through grooves are formed in two side edges of the first shell.
Preferably, the outer surface of the inner ring is provided with a first protrusion so that the inner ring within the foreskin can be rotationally moved; the inner ring is provided with a first groove, and the stitching nails are correspondingly matched with the first groove.
Preferably, the second shell is provided with a second convex part, the outer ring is provided with a second groove, and the second convex part is correspondingly matched with the second groove, so that the circumcision part does not displace when suturing and cutting the foreskin.
Preferably, a glans protection cover is arranged in the second shell, and the glans protection cover is connected with the second shell through a spring so as to protect the glans.
Compared with the prior art, the circumcision stitching instrument provided by the invention not only comprises the circumcision fixing ring capable of accurately positioning the circumcision length, but also comprises the circumcision stitching part capable of stitching and cutting redundant foreskin once, so that the circumcision stitching instrument can accurately position the circumcision length and simultaneously realize once-through cutting, thereby effectively reducing the occurrence of postoperative edema, pain and infection of a patient while ensuring beautiful incision.
Drawings
Fig. 1 is a schematic structural view of a foreskin fixing ring according to a first and a second embodiment of the present invention.
Fig. 2 is a schematic view of another structure of a foreskin retaining ring according to the first and second embodiments of the invention.
Fig. 3 is a schematic view of a circumcision suture device according to an embodiment of the present invention.
Fig. 4 is an exploded view showing a schematic structure of a circumcision stapler according to an embodiment of the present invention.
Figure 5 is an exploded view in another direction of a schematic view of the structure of an improved circumcision stapler according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a circumcision stapler according to a second embodiment of the present invention.
Fig. 7 is an exploded view of a schematic structural diagram of a circumcision stapler according to a second embodiment of the present invention.
Fig. 8 is an exploded view of a second embodiment of the present invention in another direction, illustrating a schematic configuration of a circumcision stapler.
Description of main reference numerals:
circumcision devices 100, 200
Prepuce fixing ring 30
Circumcision sites 40, 50
Inner ring 1
Outer ring 2
Buckle 3
Clamping groove 4
First housing 5, 5'
Second housing 6
Rotating member 7
Knife anvil ring 8
Nail cartridge ring 9
Firing part 10
Stitching nail 11
First convex portion 12
First groove 13
Second convex portion 14
Second groove 15
Spring 16
Glans protection cover 17
Firing handle 18
Rotating handle 19
And a through slot 20.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, when one component is considered to be "connected" or "connected" to another component, it may be fastened or detachably connected, and one component may be directly connected to another component or indirectly connected to another component through an intervening component.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, 2, 3, 4 and 5, a first embodiment of the present invention provides a circumcision device 100, wherein the circumcision device 100 comprises a circumcision fixing ring 30 and a circumcision part 40, the circumcision fixing ring 30 comprises an inner ring 1 and an outer ring 2, the inner ring 1 is used for positioning a circumcision length, the outer ring 2 is used for fixing an everting foreskin wrapped by the inner ring 1, the circumcision part 40 and the outer ring 2 are detachably connected, and the circumcision part is used for cutting foreskin and suturing a wound. In the existing circumcision part, the glans penis seat is adopted to extend into the inner part of the foreskin to fix the foreskin and then cut, so that the actual cutting length of the foreskin cannot be determined because the foreskin is opaque, the distance between the inner plate and the outer plate of the foreskin at the predicted cutting position and the coronary sulcus is not clear, and the aesthetic property of the foreskin after the foreskin cutting operation is reduced. While this embodiment provides a circumcision stapler 100 for securing an everted foreskin by the foreskin securing ring 30 to prevent the foreskin from being covered by the circumcision seal 40, thereby achieving one-time accurate cutting of the redundant foreskin.
In this embodiment, the circumcision part 40 includes a first housing 5, the first housing 5 is provided with three fasteners 3, specifically, three fasteners 3 are equally spaced at the end of the first housing 5, correspondingly, the outer ring 2 is provided with three clamping grooves 4, and the fasteners 3 are inserted into the clamping grooves 4 to detachably clamp the circumcision part 40 with the outer ring 2. Specifically, when the three buckles 3 are respectively inserted into the corresponding clamping grooves 4, and then are rotationally clamped, the clamping connection between the circumcision joint 40 and the outer ring 2 is completed. It should be noted that, in other embodiments of the present invention, the first housing 5 may be provided with more than three clips 3, and correspondingly, the outer ring 2 may also be provided with more than three slots 4.
Further, the circumcision part 40 includes a second housing 6 and a rotating member 7, where the rotating member 7 is installed in the first housing 5 and sleeved on the second housing 6, and is used to push the second housing 6 to compress and thin the foreskin. Specifically, the rotating member 7 is in threaded connection with the first housing 5, a threaded end of the rotating member 7 abuts against a boss surface at the top end of the second housing 6, and the rotating member 7 is rotated to push the second housing 6 to compress and thin the foreskin so as to achieve the suturing and cutting thickness.
Further, a foreskin cutting and suturing assembly is arranged in the second shell 6, the foreskin cutting and suturing assembly comprises a knife anvil ring 8 (not shown) for cutting the foreskin and a nail bin ring 9 for suturing the foreskin, and a plurality of suturing nails 11 (not shown) are arranged in the nail bin ring.
Preferably, the outer surface of the inner ring 1 is provided with a plurality of first protrusions 12 so that the inner ring 1 in the everting shell can be rotationally moved; the end of the inner ring 1 is further provided with a first groove 13 having the same number as the staples 11 (not shown), and the staples 11 (not shown) are correspondingly engaged with the first grooves 13.
Preferably, the end of the second casing 6 is provided with a number of second protrusions 14 equal to the number of first grooves 13, specifically, a number of second protrusions 14 are distributed at equal intervals on the end of the second casing 6, correspondingly, the outer ring 2 is provided with a number of second grooves 15 equal to the number of second protrusions 14, in this embodiment, the second protrusions 14 are cylinders with smooth edges protruding outwards, the second grooves 15 are cylindrical grooves with smooth edges and concave downwards, and the second protrusions 14 are respectively matched with the second grooves 15 correspondingly, so as to prevent the circumcision joint 40 from displacing when circumcision and suturing are performed. The second protrusion 14 and the second groove 15 may have other shapes in other embodiments to achieve the positioning function, which is not limited in this embodiment.
Preferably, a glans protection cover 17 is further disposed in the second casing 6, the glans protection cover 17 is connected with the second casing 6 through a spring 16, the spring 16 has a buffering function, and when the circumcision part 40 performs suturing and cutting on the redundant foreskin, the glans protection cover 17 protects the glans from the impact of the second casing 6 by using the buffering function of the spring 16. In this embodiment, the glans protection cover 17 is in a cylindrical cover shape, however, in other embodiments, the glans protection cover 17 may be in other shapes, which is not limited in this embodiment.
Further, the circumcision part 40 is further provided with a firing handle 18 and a firing part 10, the firing handle 18 is movably connected with the firing part 10, the firing part 10 is connected with a circumcision suturing assembly and a second casing, and the firing handle 18 fires the knife anvil ring 8 (not shown) through the firing part 10 to cut the foreskin and the suturing nail 11 (not shown) to suture the foreskin.
Compared with the prior art, the circumcision device provided by the embodiment comprises a circumcision fixing ring and a circumcision joint part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing the everting foreskin covered by the inner ring, the circumcision joint part and the outer ring are detachably connected, and the circumcision joint part is used for cutting and suturing the foreskin. The second shell is pushed by the rotating piece to compress and thin the foreskin so as to achieve the thickness of suture cutting. In this embodiment, the rotating member is a rotating ring. The foreskin anastomat can accurately position the foreskin cutting length and realize disposable cutting, thereby effectively reducing the occurrence of postoperative edema, pain and infection of patients.
Referring to fig. 1, 2, 6, 7 and 8, a circumcision stapler 200 is provided in a second embodiment of the present invention, the circumcision stapler 200 includes a circumcision fixing ring 30 and a circumcision stitching portion 50, the circumcision fixing ring 30 has the same structure as the circumcision fixing ring 30 provided in the first embodiment, the circumcision stitching portion 50 has the same structure as the circumcision stitching portion 40 provided in the first embodiment, and the difference is that the component for pushing the second housing 6 to compress and thin the foreskin is different.
The circumcision part 50 comprises a first shell 5 'and a rotary handle 19, the first shell 5' covers the second shell 6 and the firing part 10, through grooves 20 for the firing handle 18 to pass through and move are formed in two sides of the first shell 5', and the rotary handle 19 is in threaded connection with the tail of the first shell 5' and is in butt joint with the firing part 10, so that the firing part 10 and the second shell 6 are pushed to compress and thin the foreskin in a rotary mode to achieve the stitching cutting thickness.
Compared with the prior art, the circumcision device provided by the embodiment comprises a circumcision fixing ring and a circumcision joint part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing the everting foreskin covered by the inner ring, the circumcision joint part and the outer ring are detachably connected, and the circumcision joint part is used for cutting and suturing the foreskin. Wherein, through rotating the handle in order to promote percussion portion and second casing and compress tightly the foreskin and press to thin in order to reach the suture cutting thickness. The foreskin anastomat can accurately position the foreskin cutting length and realize disposable cutting, thereby effectively reducing the occurrence of postoperative edema, pain and infection of patients.
The preferred embodiments of the present patent are described in detail, but the present patent is not limited by the above examples, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (8)
1. A circumcision device is characterized by comprising a circumcision fixing ring and a circumcision part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing the circumcision covered with the inner ring, the circumcision part and the outer ring are detachably connected, the circumcision part is used for suturing and cutting the circumcision,
the circumcision joint part comprises a first shell, a second shell, a firing part and a rotating piece,
the first shell is provided with a buckle, the outer ring is provided with a clamping groove, the buckle is inserted into the clamping groove and rotationally clamped so as to lead the circumcision joint part to be detachably clamped with the outer ring,
the firing part is connected with the second shell, and the rotating part is arranged in the first shell and sleeved on the second shell in an outer sleeved mode and is used for pushing the second shell to compress and thin the foreskin.
2. A circumcision device is characterized by comprising a circumcision fixing ring and a circumcision part, wherein the circumcision fixing ring comprises an inner ring and an outer ring, the inner ring is used for positioning the circumcision length, the outer ring is used for fixing the circumcision covered with the inner ring, the circumcision part and the outer ring are detachably connected, the circumcision part is used for suturing and cutting the circumcision,
the circumcision joint part comprises a first shell, a second shell, a firing part and a rotary handle,
the first shell is provided with a buckle, the outer ring is provided with a clamping groove, the buckle is inserted into the clamping groove and rotationally clamped so as to lead the circumcision joint part to be detachably clamped with the outer ring,
the first shell wraps the second shell and the firing part, the tail of the first shell is in threaded connection with the rotary handle, and the rotary handle is in butt joint with the firing part and used for rotationally pushing the firing part and the second shell to compress and thin the foreskin.
3. The circumcision stapler of claim 1 or 2, wherein a circumcision stapling assembly is provided within the second housing, the circumcision stapling assembly including an anvil ring for cutting the foreskin and a cartridge ring for stapling the foreskin, the cartridge ring having staples provided therein.
4. The circumcision device as claimed in claim 1 or 2, wherein the circumcision section is further provided with a firing handle capable of driving the firing section to fire the circumcision stapling assembly to stapling and incise the foreskin.
5. The circumcision cutter as claimed in claim 1 or 2, wherein the first housing is provided with through slots on both sides.
6. The circumcision cutter as claimed in claim 3, wherein the outer surface of the inner ring is provided with a first protrusion to allow the inner ring within the foreskin to be rotationally moved; the inner ring is provided with a first groove, and the stitching nails are correspondingly matched with the first groove.
7. The circumcision device as claimed in claim 1 or 2, wherein the second housing is provided with a second protrusion, the outer ring is provided with a second groove, and the second protrusion corresponds to the second groove, so that the circumcision part does not displace when the circumcision part performs suture cutting on the foreskin.
8. The circumcision cutter as claimed in claim 1 or 2, wherein a glans protection cover is provided in the second housing, and the glans protection cover is connected with the second housing through a spring to protect the glans.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289181.4A CN107874816B (en) | 2017-12-07 | 2017-12-07 | Circumcision device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711289181.4A CN107874816B (en) | 2017-12-07 | 2017-12-07 | Circumcision device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107874816A CN107874816A (en) | 2018-04-06 |
| CN107874816B true CN107874816B (en) | 2023-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711289181.4A Active CN107874816B (en) | 2017-12-07 | 2017-12-07 | Circumcision device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107874816B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108938032A (en) * | 2018-09-28 | 2018-12-07 | 广州德脉医疗器械有限公司 | A kind of radioactivity nail bin |
| CN110179530A (en) * | 2019-03-26 | 2019-08-30 | 深圳市人民医院 | A kind of visual foreskin Endo-GIA |
| CN113476113B (en) * | 2021-07-06 | 2022-11-22 | 江西神你医疗器械有限公司 | Circumcision stitching instrument and circumcision stitching device |
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| CN106037890A (en) * | 2016-08-03 | 2016-10-26 | 重庆爱众医疗器械有限公司 | Disposable prepuce cutting anastomat |
| CN205964119U (en) * | 2016-04-20 | 2017-02-22 | 河南立科达医疗用品科技有限公司 | Wrapper prepuce circumcising device |
| CN107080573A (en) * | 2017-01-16 | 2017-08-22 | 芜湖商环科技有限公司 | A kind of Type B eversion type prepuce cutting stitching instrument |
| CN208551953U (en) * | 2017-12-07 | 2019-03-01 | 贵州省人民医院 | Circumcision suturing device |
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2017
- 2017-12-07 CN CN201711289181.4A patent/CN107874816B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2778209Y (en) * | 2005-02-05 | 2006-05-10 | 商建忠 | Disposable prepuce pipe-type ring-cutting instrument |
| TW201534262A (en) * | 2009-04-28 | 2015-09-16 | jian-zhong Shang | Circumcision anastomat |
| CN102548492A (en) * | 2009-07-16 | 2012-07-04 | 西尔克医疗科技有限公司 | Circumcision device and method for mass circumcision |
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| CN103405265A (en) * | 2013-08-24 | 2013-11-27 | 严凤国 | Circumcision suturing apparatus and disposable circumcision suturing knife bit thereof |
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| CN104161571A (en) * | 2014-08-22 | 2014-11-26 | 宁波海泰科迈医疗器械有限公司 | Circumcision stitching instrument |
| CN205964119U (en) * | 2016-04-20 | 2017-02-22 | 河南立科达医疗用品科技有限公司 | Wrapper prepuce circumcising device |
| CN106037890A (en) * | 2016-08-03 | 2016-10-26 | 重庆爱众医疗器械有限公司 | Disposable prepuce cutting anastomat |
| CN107080573A (en) * | 2017-01-16 | 2017-08-22 | 芜湖商环科技有限公司 | A kind of Type B eversion type prepuce cutting stitching instrument |
| CN208551953U (en) * | 2017-12-07 | 2019-03-01 | 贵州省人民医院 | Circumcision suturing device |
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| Publication number | Publication date |
|---|---|
| CN107874816A (en) | 2018-04-06 |
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