CN213588367U

CN213588367U - Endoscopic surgery visual field former with cover body

Info

Publication number: CN213588367U
Application number: CN202022147329.4U
Authority: CN
Inventors: 付春龙; 张亚群
Original assignee: Beijing Hospital
Current assignee: Beijing Hospital
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-07-02
Anticipated expiration: 2030-09-27

Abstract

An endoscopic surgery visual field former with a cover body comprises a hollow hemisphere structure; the skin care device is characterized in that the hemispherical structure is of a transparent structure, the hemispherical structure is provided with a negative pressure pumping hole which cannot be close to the skin, and a negative pressure pumping pipe connected with the negative pressure pumping structure is arranged in the negative pressure pumping hole; the negative pressure pumping hole is arranged at the upper half part of the hemispherical structure; one end of the negative pressure pumping pipe is connected with the negative pressure pumping structure, and the other end of the negative pressure pumping pipe is arranged on the inner side surface of the hemispherical structure or extends into the cavity inside the hemispherical structure; the hemispherical structure is provided with an extension hole, and an extension pipe for instruments to extend into is arranged in the extension hole; an air leakage preventing structure which is tightly connected with the extension pipe is arranged beside the extension hole; the first end of the extension tube is arranged in the hemispherical structure, and an adsorption structure capable of adsorbing the extension tube to skin is arranged on the outer side of the tube wall of the foremost end of the first end of the extension tube; the puncture instrument enters the hemispherical structure through the extension tube. Through setting up hemisphere structure and setting up the structure of taking out negative pressure on hemisphere structure, can form the operation field of vision.

Description

Endoscopic surgery visual field former with cover body

Technical Field

The utility model belongs to the technical field of medical instrument is used in the wicresoft's operation is supplementary, especially, relate to the auxiliary instrument who uses during laparoscopic surgery, concretely relates to is a cover body laparoscopic surgery field of vision ware.

Background

Laparoscopic surgery is a newly developed minimally invasive method and is a necessary trend for the development of future surgical methods. With the rapid advance of industrial manufacturing technology, the fusion of related disciplines lays a firm foundation for the development of new technology and new method, and the more and more skillful operation of doctors makes many of the past open operations replaced by the intracavitary operations, thereby greatly increasing the operation selection opportunities. However, the small field of view of laparoscopic surgery is an important factor limiting the surgical development, and the internal tissues are easily damaged due to insufficient space in the small surgical field of view, and once the damage is caused, the recovery is difficult.

In order to achieve the maximum visual field of the laparoscopic surgery, the skin of a patient generally needs to be lifted, when a puncture instrument needs to be arranged in the existing laparoscopic surgery, the skin needs to be lifted by means of a traction forceps to form a certain gap under the skin, the surgical visual field is increased, a puncture structure is arranged in the puncture instrument, the puncture instrument enters the formed gap, and the internal tissue is prevented from being damaged due to the insufficient space after the puncture instrument enters, but the traction of the traction forceps on the skin cannot be effectively maintained, and the patient easily feels strong pain, so that the patient feels uncomfortable.

There is therefore a need for an apparatus that can continuously pull the skin up without causing discomfort to the patient, which solves the technical problems of the prior art.

The utility model discloses skin tractive mode does not last among the prior art, and the operation field of vision forms unstable technical problem, provides a cover body laparoscopic surgery field of vision ware.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problem that the operation gap formed by skin traction in the prior art is not continuous, the utility model provides a visual field former for endoscopic surgery with a cover body.

An endoscopic surgery visual field former with a cover body comprises a hollow hemisphere structure; the skin care device is characterized in that the hemispherical structure is of a transparent structure, the hemispherical structure is provided with a negative pressure pumping hole which cannot be close to the skin, and a negative pressure pumping pipe connected with the negative pressure pumping structure is arranged in the negative pressure pumping hole; the negative pressure pumping hole is arranged at the upper half part of the hemispherical structure; the first end of the negative pressure pumping pipe is arranged on the outer side of the hemispherical structure and connected with the negative pressure pumping structure, and the second end of the negative pressure pumping pipe is arranged on the inner side surface of the hemispherical structure or extends into the inner cavity of the hemispherical structure; the hemispherical structure is provided with an extension hole, and an extension pipe for instruments to extend into is arranged in the extension hole; an air leakage preventing structure closely connected with the extension pipe is arranged beside the extension hole; the first end of the extension tube is arranged in the hemispherical structure, and an adsorption structure capable of adsorbing the extension tube to skin is arranged on the outer side of the tube wall of the foremost end of the first end of the extension tube; the puncture instrument enters the hemispherical structure through the extension tube. Through the arrangement of the hollow hemispherical structure and the negative pressure pumping pipe connected with the negative pressure pumping structure, the skin can be sucked up in the cavity of the hemispherical structure by virtue of the negative pressure effect to form a larger laparoscopic surgery visual field, so that the puncture instrument can be kept to have enough movement space, and the tissues in the abdominal cavity can be protected. The arrangement of the air leakage prevention structure can ensure a continuous negative pressure environment; the arrangement of the adsorption structure can ensure that the stretching pipe is effectively contacted with the skin, and air leakage is prevented from occurring through the stretching pipe. After the use, the air is put into the cavity by pressing the skin at the bottom of the hemispherical structure, the hemispherical structure is released from the skin, and the use is finished.

Further, the adsorption structure is a sucker arranged along the circumference of the pipe wall.

Furthermore, the air leakage prevention structure is a first sealing ring which is arranged beside the stretching hole and is tightly connected with the stretching pipe. The effect of leak protection gas can be realized through setting up sealing ring one.

Furthermore, the first sealing ring is a flexible first sealing ring, and a thin flexible sheet is arranged around the inner side of the first sealing ring, so that air leakage from the first sealing ring can be further prevented.

Or the first sealing ring is a flexible first sealing ring, and the width range of the first sealing ring is 5-8 mm; this arrangement ensures that the angle of the various operating instruments entering through the insertion tube can be varied.

Or the hemisphere structure is provided with a square boss, the center of the square boss is provided with an extension hole, and the air leakage preventing structure is a sealing ring II arranged between the extension hole and the extension pipe; the second sealing ring is an elastic pad arranged on the periphery of the extending hole. The arrangement of the direction bosses can facilitate the arrangement of the structures of all the parts, and the use effect is better.

Furthermore, a plurality of elastic pads are uniformly arranged in the extending holes, wherein 3 elastic pads are preferably arranged.

Furthermore, 1-3 square bosses are arranged, so that the requirement of a laparoscopic surgery requiring multiple instruments to enter is met.

Furthermore, a small platform is arranged at the spherical top of the hemispherical structure, so that small instruments can be conveniently placed.

Furthermore, a structure for increasing friction force is arranged on the small platform, so that the position stability of the object on the platform is ensured.

Furthermore, a one-way valve for placing gas to enter is arranged in the negative pressure pumping pipe. The arrangement of the one-way valve can ensure the stability of negative pressure.

Further, set up the gas release pipe at hemispherical structure, the first end of gas release pipe is in the hemispherical structure outside, and the second end is on the hemispherical structure medial surface, and the first end tip of gas release pipe sets up the cover cap, and this kind of setting can guarantee the gassing work after the hemispherical structure uses, and because the second end sets up on the hemispherical structure medial surface, can not cause pressure to skin when guaranteeing to use.

Further, the bleeder pipe is arranged at the bottom of the hemispherical structure, and the arrangement can effectively ensure the working space above.

Furthermore, the bottom edge of the hemispherical structure is provided with a 360-degree soft ring, and the soft ring can ensure the comfort when the hemispherical structure is in contact with the skin.

Further, soft ring and hemisphere structure combination set up, set up the cell body that holds hemisphere structure bottom edge on the soft ring.

Further, the soft ring may be provided with any material capable of protecting the skin, wherein a silicone material or a soft rubber material is preferred.

Further, still set up around soft ring lateral surface and extend the wing, extend the wing and set up along soft ring 360, extend the stability when setting up of wing can the hemisphere structure use, prevent only for causing hemisphere structure's the problem of droing because of rocking the gas leakage that causes, make the structure use more stable.

Further, the extension wing is in a structure which becomes thinner from the outer side of the soft ring, and the arrangement can ensure the stability of the arrangement.

Furthermore, the extension wings are made of the same material as the soft rings and are integrated, when the device is used, the soft rings and the extension wings can be arranged at the corresponding positions of the skin, and then the hemispherical structures are reversely buckled into the corresponding grooves, so that the whole structure is comfortable and stable.

Further, the hemisphere structure sets up to stereoplasm hemisphere structure, and its inlayer sets up the soft silica gel layer of one deck, and the stability of structure when this kind of setting can be guaranteed to the use.

Further, the negative pressure pumping pipe is glued on the negative pressure pumping hole, and the first end of the negative pressure pumping pipe is arranged on the inner side face of the hemispherical structure.

Further, a pressure sensor is arranged in the negative pressure pumping pipe; the pressure sensor is connected with a control structure at the rear end through a lead arranged in a lead channel on the side wall of the negative pressure pumping pipe, and the control structure is connected with the negative pressure pumping structure; the pressure sensor transmits pressure to the control structure, and when the pressure value is too low, the negative pressure pumping structure is started to work. By the arrangement, the operation visual field can be maximized, and the damage to the skin caused by overlarge pressure can be prevented.

Further, the negative pressure pumping structure is an electric negative pressure pumping structure, a start-stop switch of the negative pressure pumping structure is connected with the control structure, and the control structure controls the start and stop of the negative pressure pumping structure.

Furthermore, the control structure and the negative pressure pumping structure are arranged in an accommodating cavity, and the accommodating cavity extends out of a connecting pipe for connecting the negative pressure pumping structure and the negative pressure pumping pipe; and a lead connecting the baroreceptor and the control structure.

Further, the lead comprises a connecting baroreceptor segment and a control structure segment; the two are connected in a mode of the plug connector and the plug hole.

Further, the baroreceptor segment extends from the lead channel and is connected to the control structure segment.

Further, hold the chamber and hold the chamber for the rectangle, its side sets up the fixed knot who can fix to the bedside and constructs, sets up it beside the bed during use, can not occupy the space on the bed, can not cause the interference in field of vision.

Further, fixed knot constructs including the cover shell of strong magnetism piece and parcel strong magnetism piece, through covering the shell with magnetism piece with hold the chamber and be connected. And the containing cavity can be effectively arranged at the bed side.

Further, hold and set up in the display structure that control structure connects on the chamber, the display structure is the touch control mode, and the switch setting of whole structure is on the display structure or by the display structure.

Furthermore, the containing cavity is internally provided with a direct current power supply or a power supply plug which is provided with a control structure and a negative pressure pumping structure for providing energy.

Furthermore, a plurality of access holes are arranged on the hemispherical structure; the multiple access holes can meet the requirements of multiple instruments for implantation.

Furthermore, the hemisphere structures with different diameters are arranged according to the operation requirement.

Further, the diameter range of the hemispherical structure is: 6-15 mm; to meet different surgical needs.

Furthermore, the hemisphere structure is made of transparent plastic material; the wall thickness range of the hemispherical structure is 2-5 mm; the thickness ensures the strength of the hemispherical structure and prevents the damage in the using process.

Compared with the prior art, the technical scheme can effectively form enough operation visual field by arranging the hemispherical structure and the negative pressure pumping structure, and ensures the safety of the operation.

Through will taking out the negative pressure structure, baroreceptor and control structure are connected, can effectively realize intelligent monitoring the negative pressure, guarantee the safety of skin during the operation.

Through setting up and stretching into the hole, stretch into pipe and sealing ring and can effectively prevent gas leakage, make negative pressure keep in the space.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall longitudinal cross-sectional structure of the present invention;

FIG. 3 is a schematic structural view of a hemispherical structure of the present invention;

FIG. 4 is a schematic view of a portion of the hemisphere structure with the first sealing ring of the present invention

FIG. 5 is a schematic longitudinal sectional view of a hemisphere structure of the present invention;

FIG. 6 is a schematic view of the structure of the square boss of the present invention;

FIG. 7 is a schematic view of the structure of the tube

FIG. 8 is a schematic view of the inner wall structure of the accommodating chamber of the present invention;

FIG. 9 is a schematic view of the rear side structure of the accommodating chamber of the present invention;

fig. 10 is a schematic structural view of the wire plug and the plug hole of the present invention;

FIG. 11 is a schematic view of the structure of the one-way valve in the negative pressure pumping pipe of the present invention;

figure 12 is a schematic longitudinal cross-sectional view of a portion of the construction of the pressure susceptor of the present invention;

in the figure, 1, a hemisphere structure; 11. pumping a negative pressure hole; 12. a negative pressure pipe is pumped; 121. a one-way valve; 13. an access hole; 131. extending the tube; 132. an adsorption structure; 14. a first sealing ring; 141. a square boss; 142. a second sealing ring; 15. discharging the air pipe; 151. a covering cap; 16. a soft ring; 161. an extension wing; 17. a baroreceptor; 18. a control structure; 19. a wire; 191. a plug-in connector; 192. inserting holes; 20. an accommodating chamber; 21. A connecting pipe; 22. the strong magnetism is fast; 23. a covering shell; 24. a display structure; 25. a direct current power supply; 26. a small platform; 27. and a negative pressure pumping structure.

Detailed Description

Embodiment 1 endoscopic surgery visual field former with cover

An endoscopic surgery visual field former with a cover body comprises a hollow hemisphere structure 1; wherein, the hemisphere structure 1 is a transparent structure, the hemisphere structure 1 is provided with a negative pressure pumping hole 11 which can not be close to the skin, and a negative pressure pumping pipe 12 connected with the negative pressure pumping structure 27 is arranged in the negative pressure pumping hole 11; the negative pressure pumping hole 11 is arranged at the upper half part of the hemispherical structure 1; the first end of the negative pressure pumping pipe 12 is arranged on the outer side of the hemispherical structure 1 and connected with the negative pressure pumping structure 27, and the second end of the negative pressure pumping pipe 12 is arranged on the inner side surface of the hemispherical structure 1 or extends into the inner cavity of the hemispherical structure 1; an extension hole 13 is arranged on the hemispherical structure 1, and an extension pipe 131 for extending an instrument is arranged in the extension hole 13; an air leakage prevention structure tightly connected with the extension pipe 131 is arranged beside the extension hole 13; the first end of the extending pipe 131 is arranged inside the hemispherical structure 1, and an adsorption structure 132 capable of adsorbing the extending pipe 131 to the skin is arranged outside the most front pipe wall of the first end of the extending pipe 131; the suction structure 132 is a suction cup disposed along the circumference of the tube wall, and the puncturing device enters the hemispherical structure 1 through the insertion tube 131. Through the arrangement of the hollow hemispherical structure 1 and the negative pressure pumping pipe 12 connected with the negative pressure pumping structure 27, the skin can be sucked up in the cavity of the hemispherical structure 1 by means of negative pressure to form a larger laparoscopic surgery visual field, so that the puncture instrument has enough movement space, and the tissues in the abdominal cavity are protected. The arrangement of the air leakage prevention structure can ensure a continuous negative pressure environment; the inlet tube 131 can be effectively brought into contact with the skin by the adsorption structure 132, and the occurrence of air leakage through the inlet tube 131 can be prevented. Realize putting into the cavity with gas through the skin of pressing hemisphere structure 1 bottom after the use, release hemisphere structure 1 from skin department and end the use, whole structural design is reasonable, and easy operation is convenient.

The air leakage preventing structure is a first sealing ring 14 which is arranged beside the extending hole 13 and is tightly connected with the extending pipe 131. The first sealing ring 14 can achieve the effect of air leakage prevention. The first sealing ring 14 is a flexible first sealing ring 14, and a thin flexible sheet is arranged around the inner side of the first sealing ring 14, so that air leakage from the first sealing ring 14 can be further prevented.

A check valve 121 for preventing gas from entering is arranged in the negative pressure pumping pipe 12. The one-way valve 121 is provided to ensure the stability of the negative pressure.

Set up gas release pipe 15 at hemisphere 1, gas release pipe 15's first end is in hemisphere 1 outside, and the second end is on hemisphere 1 medial surface, and gas release pipe 15 first end tip sets up and covers cap 151, and this kind of setting can guarantee the gassing work after hemisphere 1 uses, and because the second end sets up on hemisphere 1 medial surface, can guarantee not to cause pressure to skin when using. The air release pipe 15 is arranged at the bottom of the hemispherical structure 1, and the arrangement can effectively ensure the working space above.

The bottom edge of the hemispherical structure 1 is provided with a soft ring 16 of 360 degrees, and the soft ring 16 can ensure the comfort when the hemispherical structure 1 is contacted with the skin. The soft ring 16 is combined with the hemispherical structure 1, and a groove body for accommodating the bottom edge of the hemispherical structure 1 is arranged on the soft ring 16. The soft ring 16 may be provided with any material that can protect the skin, preferably a silicone material or a soft rubber material.

Hemisphere 1 sets up to stereoplasm hemisphere 1, and its inlayer sets up the soft silica gel layer of one deck, and the stability of structure when this kind of setting can be guaranteed to the use.

The negative pressure pumping pipe 12 is glued on the negative pressure pumping hole 11, and the first end of the negative pressure pumping pipe 12 is arranged on the inner side surface of the hemispherical structure 1.

Different diameter hemispherical structures 1 are provided according to the surgical needs. The diameter range of the hemispherical structure 1 is:

6-15 mm; to meet different surgical needs. The hemisphere structure 1 is made of transparent plastic; the wall thickness range of the hemispherical structure 1 is 2-5 mm; such a thickness ensures the strength of the hemispherical structure 1 and prevents damage during use.

Embodiment 2 endoscopic surgery visual field former with cover

The hemisphere structure 1 is provided with a square boss 141, the center of the square boss 141 is provided with an extension hole 13, and the air leakage prevention structure is a second sealing ring 142 arranged between the extension hole 13 and the extension pipe 131; the second sealing ring 142 is an elastic pad disposed around the extending hole 13. The arrangement of the direction bosses can facilitate the arrangement of the structures of all the parts, and the use effect is better. A plurality of elastic cushions are arranged uniformly in the insertion opening 13, wherein preferably 3 elastic cushions are arranged. 1-3 square bosses 141 are arranged to meet the requirement of the laparoscopic surgery requiring the entry of multiple instruments.

A small platform 26 is arranged at the spherical top of the hemispherical structure 1, so that small instruments can be conveniently placed. The small platform 26 is provided with a structure for increasing friction force, so that the position stability of the object on the platform is ensured.

A pressure sensor 17 is arranged in the negative pressure pumping pipe 12; the baroreceptor 17 is connected with a control structure 18 at the rear end through a lead 19 arranged in a lead 19 channel on the side wall of the negative pressure pumping tube 12, and the control structure 18 is connected with a negative pressure pumping control structure 27; the pressure sensor 17 transmits pressure to the control structure 18, and when the pressure value is too low, the negative pressure pumping structure 27 is started to work. By the arrangement, the operation visual field can be maximized, and the damage to the skin caused by overlarge pressure can be prevented. The negative pressure pumping structure 27 is an electric negative pressure pumping structure 27, a start-stop switch of the negative pressure pumping structure is connected with the control structure 18, and the control structure 18 controls the start and stop of the negative pressure pumping structure 27. The control structure 18 and the negative pressure pumping structure 27 are arranged in an accommodating cavity 20, and the accommodating cavity 20 extends out of a connecting pipe 21 for connecting the negative pressure pumping structure 27 and the negative pressure pumping pipe 12; and a wire 19 connecting the pressure sensor 17 with the control structure 18. The lead 19 comprises a section connecting the baroreceptor 17 with the control structure 18; the two are connected by means of the plug 191 and the plug hole 192. The baroreceptor 17 extends from the lead 19 and is connected to the control structure 18.

The holding cavity 20 is a rectangular holding cavity 20, the side surface of the holding cavity is provided with a fixing structure which can be fixed to the bedside, and the holding cavity is arranged beside the bedside during use, so that the space on the bedside is not occupied, and the visual field is not interfered. The fixed knot constructs including strong magnetism piece and the cover shell 23 of parcel strong magnetism piece, through cover shell 23 with the magnetism piece with hold the chamber 20 and be connected. And the accommodation chamber 20 can be efficiently provided on the bed side. A dc power supply 25 or power plug is provided in the receiving cavity 20 for supplying power to the control structure 18 and the negative pressure pumping structure 27.

Different diameter hemispherical structures 1 are provided according to the surgical needs. The diameter range of the hemispherical structure 1 is: 6-15 mm; to meet different surgical needs. The hemisphere structure 1 is made of transparent plastic; the wall thickness range of the hemispherical structure 1 is 2-5 mm; such a thickness ensures the strength of the hemispherical structure 1 and prevents damage during use.

Embodiment 3 endoscopic surgery visual field former with cover

The air leakage preventing structure is a first sealing ring 14 which is arranged beside the extending hole 13 and is tightly connected with the extending pipe 131. The first sealing ring 14 can achieve the effect of air leakage prevention. The first sealing ring 14 is a flexible first sealing ring 14, and a thin flexible sheet is arranged around the inner side of the first sealing ring 14, so that air leakage from the first sealing ring 14 can be further prevented. The first sealing ring 14 is a flexible first sealing ring 14, and the width range of the ring is 5-8 mm; this arrangement can ensure a change in the angle of various operating instruments entered through the extension tube 131.

Still set up around soft ring 16 lateral surface and extend wing 161, extend wing 161 along soft ring 16360 setting, extend the stability when wing 161's setting can hemisphere structure 1 use, prevent only for causing hemisphere structure 1's the problem of droing because of rocking the gas leakage that causes, make the structure use more stable. The extension wings 161 are formed to be gradually thinner from the outside of the soft ring 16, and this arrangement ensures the stability of the arrangement. The extension wings 161 and the soft ring 16 are made of the same material and are integrated, when the arrangement is used, the soft ring 16 and the extension wings 161 can be arranged at the corresponding position of the skin, and then the hemispherical structure 1 is reversely buckled into the corresponding groove body, so that the whole structure is kept comfortable and stable.

Embodiment 4 endoscopic surgery visual field former with cover

Embodiment 5 endoscopic surgery visual field former with cover

The accommodating cavity 20 is provided with a display structure 24 connected with the control structure 18, the display structure 24 is in a touch control mode, and switches of the whole structure are arranged on the display structure 24 or beside the display structure 24.

The above description of the embodiments is only intended to illustrate the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several modifications can be made to the present invention, and these modifications will fall within the protection scope of the claims of the present invention.

Claims

1. An endoscopic surgery visual field former with a cover body comprises a hollow hemisphere structure; the skin care device is characterized in that the hemispherical structure is of a transparent structure, the hemispherical structure is provided with a negative pressure pumping hole which cannot be close to the skin, and a negative pressure pumping pipe connected with the negative pressure pumping structure is arranged in the negative pressure pumping hole; the negative pressure pumping hole is arranged at the upper half part of the hemispherical structure; the first end of the negative pressure pumping pipe is arranged on the outer side of the hemispherical structure and connected with the negative pressure pumping structure, and the second end of the negative pressure pumping pipe is arranged on the inner side surface of the hemispherical structure or extends into the inner cavity of the hemispherical structure; the hemispherical structure is provided with an extension hole, and an extension pipe for instruments to extend into is arranged in the extension hole; an air leakage preventing structure closely connected with the extension pipe is arranged beside the extension hole; the first end of the extension tube is arranged in the hemispherical structure, and an adsorption structure capable of adsorbing the extension tube to skin is arranged on the outer side of the tube wall of the foremost end of the first end of the extension tube; the puncture instrument enters the hemispherical structure through the extension tube.

2. The shrouded laparoscopic surgical field former of claim 1 wherein the suction structure is a suction cup disposed along the circumference of the tube wall.

3. The laparoscopic surgery field former with a shield according to claim 2, wherein the air leakage preventing structure is a first sealing ring closely connected to the penetration pipe and disposed beside the penetration hole.

4. The laparoscopic surgical field former of claim 3, wherein said first sealing ring is a flexible first sealing ring, and said first sealing ring is surrounded by a thin flexible sheet.

5. The endoscopic surgery visual field former with a cover according to claim 1, wherein a square boss is arranged on the hemisphere structure, an extending hole is arranged in the center of the square boss, and the air leakage prevention structure is a second sealing ring arranged between the extending hole and the extending pipe; the second sealing ring is an elastic pad arranged on the periphery of the extending hole.

6. The laparoscopic surgical field former of claim 5, wherein a plurality of resilient pads are uniformly disposed within said access hole.

7. The laparoscopic surgical field former of claim 5, wherein 3 resilient pads are uniformly positioned within the access hole.

8. The laparoscopic surgical field former of claim 5, wherein 1-3 square bosses are provided.

9. The shrouded laparoscopic surgical field former of claim 1 wherein a small platform is provided at the spherical top of the hemispherical structure.

10. A shrouded laparoscopic surgical field former according to any of claims 1-9, wherein the diameter of the hemispherical structure ranges from: 6-15 mm.

11. A laparoscopic surgical field former according to any of claims 1 to 9, wherein the hemispherical structure is made of a transparent plastic material; the wall thickness of the hemispherical structure ranges from 2 mm to 5 mm.