CN213098092U

CN213098092U - Telescopic skin stretching device

Info

Publication number: CN213098092U
Application number: CN202021129476.2U
Authority: CN
Inventors: 任高宏
Original assignee: Southern Hospital Southern Medical University
Current assignee: Southern Hospital Southern Medical University
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-05-04
Anticipated expiration: 2030-06-17

Abstract

The utility model relates to the field of medical equipment. In particular to a telescopic skin stretching device which is suitable for being fixed at the position of defective skin and closing the wound surface by means of certain tensile force. The device comprises: two stretching parts which respectively penetrate through the two longitudinal sides of the defective skin and two adjusting parts which are used for adjusting the distance between the stretching parts. The adjusting portion includes: the skin stretching device comprises a stretching base, two connecting parts, a transverse adjusting rod and an adjusting device, wherein the stretching base is positioned at the edge of defective skin, the two connecting parts are arranged on the stretching base and used for fixing the stretching part, the transverse adjusting rod is arranged on the two stretching bases and spans the defective skin, and the adjusting device is arranged at one end of the adjusting rod and used for adjusting the effective length of the adjusting rod. The skin stretching device of the utility model has simple structure, easy installation, accurate adjustment of the stretching amount of the skin near the soft tissue defect of the patient, and simple and easy operation process; all parts of the device are positioned around the wound of a patient, so that the wound is not shielded, and the wound and the change of tissues around the wound are convenient to directly observe.

Description

Telescopic skin stretching device

Technical Field

The utility model relates to the field of medical equipment, particularly, be a scalable skin stretching device.

Background

Medically, soft tissue wounds that cannot be sutured directly are very common due to trauma, infection, donor areas after flap excision, fascial compartment syndrome incisions, superficial tumor resection, and medical chronic disease. The traditional treatment method is to change the dressing after debridement, and then to perform skin grafting or flap transplantation to close the wound after the wound is clean and granulation tissues grow well. However, the traditional skin grafting and flap transplantation may cause complications such as donor skin area infection, blood vessel crisis, poor skin abrasion resistance of the recipient area, long wound healing time, scar formation affecting the beauty and the limb function, and the like.

The skin defect repair methods are more, and at present, the treatment is generally carried out by methods such as free skin flap transplantation, local skin flap transfer or free skin flap transplantation and the like. However, the scar and pigmentation of the donor area and the recipient area which are inevitably left after the free skin sheet is transplanted are not wear-resistant and not beautiful, and are easy to cause secondary skin and joint contracture to influence the limb function and have certain risk of necrosis of the skin sheet. When the local skin flap is transferred to repair the wound surface, the area for cutting the local skin flap near the wound surface is limited, and a new supply area can not be closed in one stage; the remote free flap transplantation needs the vascular anastomosis except for the injury of the donor area, the operation time is long, and certain difficulty and risk exist technically; in addition, the texture of distant free flaps is often different from the tissue of the recipient area to a different extent, the flaps may be overstaffed after transplantation and repair, and the flaps may not be as well aesthetically pleasing with poor recovery of sensory function. Although various skin flaps and skin grafts play an indispensable role in wound repair, particularly repair of large-area soft tissue defect wounds, wounds around joints and wounds with deep tissues exposed, skin grafting and skin flap repair wounds are not the only or ideal choice for treating skin defects in many cases.

Skin stretching, also known as skin dilation, is an effective method of treating skin defects. The technique is a technique for closing the skin wound surface by means of a certain strength of pulling force. The principle of action is that normal skin on two sides of the edge of a wound surface is pulled towards the center by means of pulling force, so that the skin is prolonged by utilizing the self extensibility (also called viscoelasticity) of the skin, and the skin does not retract after the pulling force is removed, thereby generating 'extra skin' to close the wound surface. The method is simple, convenient, fast and convenient to operate, high in patient comfort, safe, effective and few in complications, is more and more widely applied in clinic in recent years, obtains good curative effect, and is proved to be an effective technical method for treating skin defects. The theoretical basis for skin stretch regeneration is the Ilizarvo tension-stress law: when the living biological tissue is slowly pulled, certain tension is generated, and the tissue regeneration and active growth can be stimulated, wherein the growth mode is cell division like fetal tissue. Theoretically, bones and soft tissues (including skin) can regenerate along the stress direction in the process of continuous, stable and slow stretching. According to the theory, as long as tension is slowly applied to the skin at the wound edge, extra skin is generated to close the wound surface, so that skin grafting or flap repair is avoided, and the operation wound is reduced. The skin has biomechanical characteristics of "tension stretch" and "stress relaxation. Skin stretching utilizes the extensibility of the skin, including the inherent elasticity, mechanical extensibility, and biological extensibility of the skin. After the skin is pulled by external force, the collagen fibers and the elastic fibers in the dermis are stretched to be arranged in parallel; when the external force exceeds the inherent bearing capacity, the elastic fibers in the skin begin to have fine fracture, the curling capacity of the collagen fibers is reduced, and the tension stretching effect of the skin is generated; the skin is pulled to a certain extent and the required external force decreases gradually with time, which is called stress relaxation effect of the skin. Stress relaxation and tensile stretch of the skin are the basis for the skin to be stretched and dilated. The skin stretching device is applied at home and abroad to directly or delay the closing of the wound surface, so that better curative effect is achieved.

The skin stretching operation is performed by means of a skin stretching device. Many types of skin stretching devices exist in the prior art, but some stretching devices are heavy, do not have micro-wound property when in use, are difficult to install and have poor wearing comfort; the design of the traction carrier at the joint of the traction belt, the steel wire or the kirschner wire of part of the skin traction device and the skin at the wound margin is still not satisfactory, and the requirements of wound surfaces with different shapes cannot be met; some skin stretching devices, especially skin stretching belts, have insufficient biomechanical strength and poor stretching reliability, and are easy to break or cut the skin at the wound edges when in use; some stretching devices can not realize accurate stretching, namely the adjusting mode is relatively extensive; the above-mentioned skin stretching retractor has various disadvantages, which limit the wide clinical application of skin stretching.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a solve above-mentioned problem, provide a scalable skin stretching device, simple structure can not shelter from the patient's surface of a wound, and can accurate stretch the closed surface of a wound of skin.

The technical proposal of the utility model is that the telescopic skin stretching device is applicable to the defective skin.

The distractor comprises:

the two stretching parts are respectively arranged at the two longitudinal sides of the defective skin and are used for fixing the edge of the defective skin;

the two adjusting parts are used for adjusting the distance between the stretching parts;

the adjusting portion includes:

two stretching bases located at the edge of the defective skin;

the two connecting parts are arranged on the stretching base and used for fixing the stretching parts;

the adjusting rods are arranged on the two stretching bases and cross the two transverse sides of the defective skin;

and the adjusting device is arranged at one end of the adjusting rod and used for adjusting the effective length of the adjusting rod.

When the skin of a patient has soft tissue wound surfaces which cannot be directly sutured due to wound, infection, supply areas after flap excision, fascial space syndrome incision, body surface tumor excision or internal medicine chronic diseases and the like, and needs to be treated by adopting a skin stretching operation, two stretching parts are respectively arranged on two opposite longer sides of a skin defect area, namely the two longitudinal sides of the defect skin, according to the length and the width of the skin injury of the patient, and the edge of the defect skin is fixed.

The central line of each adjusting part and the central line of the stretching part are arranged approximately vertically in space, and the method specifically comprises the following steps: one connecting part of the two adjusting parts is detachably fixed at the longitudinal two ends of one stretching part along the longitudinal two ends of the defective skin, and the other connecting part of the two adjusting parts is detachably fixed at the longitudinal two ends of the other stretching part.

Each connection is then removably secured to each tension base. At the moment, the stretching base is positioned at the edge of the defective skin, and in order to reduce the adverse reaction of the skin of the patient, the stretching base can be made of a high polymer material with good biocompatibility and certain elasticity. And finally, selecting an adjusting rod with a proper length according to the distance between the two stretching parts, arranging the adjusting rod on the two stretching bases which are positioned on the same side of the two stretching parts, namely crossing the two transverse sides of the defective skin, and keeping the included angle alpha between the central line of the stretching parts and the central line of the adjusting rod between 80 and 100 degrees to avoid secondary damage caused by acute angles of the skin due to the fact that the two stretching parts are staggered too much.

After the skin of the patient is stretched to a proper degree, the length of the adjusting rod is shortened by the adjusting device arranged at one end of the adjusting rod, and the skin defect for treatment is stretched again along the transverse direction of the defect skin, so that the skin of the patient is continuously stretched. In the process, the length of the adjusting rod between the two stretching parts is defined as the effective length; secondly, set up the scale on adjusting the pole or set up the precision adjusting device on adjusting device, can realize the accurate regulation of ration.

The structure of the technical scheme is positioned around the defective skin of the patient, so that the wound surface of the patient is not shielded, and the change of the wound surface of the patient and the tissue around the wound surface can be conveniently and directly observed; secondly, can form two bridging type between the tractive ware component among this technical scheme and fix, only need adopt during the operation to stretch out the portion and grasp skin, need not to adopt extra device to fix, reduced the wound of treatment, do benefit to patient's recovery.

Furthermore, in order to avoid replacing the adjusting rod in the operation, the adjusting rod device is designed to be formed by telescopically nesting a plurality of short rods; furthermore, the short rods are hollow round tubes, and are connected through threads in the two short rods which are nested with each other. The number of the short rods and the length of the short rods are adjusted to adapt to wound treatment of different sizes, and the applicability of the adjusting rod is improved.

Further, the adjusting device comprises a sleeve and a tightening piece which are connected with the tension base; the outer dimension of the tightener is larger than the sleeve; one end of the adjusting rod penetrates through the sleeve to be connected with the tightening piece.

The sleeve is fixed on the stretching base, when the adjusting rod is installed, one end of the sleeve is arranged on one stretching base of the adjusting part, and the other end of the sleeve penetrates through the sleeve in the axial direction and is connected with the tightening piece; furthermore, a threaded rod or a nut with an inner corner groove is used as a tightening piece, the outer diameter of the threaded rod or the nut is larger than the inner diameter of the sleeve, the adjustable part of the tightening piece is ensured to be exposed, when the effective length of the adjusting rod needs to be shortened, a wrench or a similar device is inserted into the tightening piece, and the short rod is controlled to be screwed in until the effective length of the adjusting rod is shortened to a proper length; the shortening amount of the adjusting rod can be determined according to the rotation number of the tightening piece in the adjusting process, and the adjusting mode is simple, visual and easy to operate.

Furthermore, in order to guarantee the treatment progress of the patient, once the distractor is installed and arranged, the abnormal change of the effective length of the adjusting rod, particularly the increase of the effective length caused by the sliding or loosening of the wire between the adjusting rod and the tightening piece, is avoided as much as possible. Therefore, the distractor also comprises a second compression rod which penetrates through the sleeve and is used for compressing the adjusting rod, and after the effective length of the adjusting rod is adjusted, a hole for the second compression rod to penetrate through is formed in the adjusting rod area between the two stretching bases, namely the sleeve adjacent to the inner side of the adjusting rod. Preferably, the second pressing rod is a screw, is fixed with the hole in the sleeve by threads, and presses the adjusting rod by screwing the second pressing rod; furthermore, a gasket or other similar anti-slip structure is arranged on the pressing surface of the second pressing rod.

Further, stretch base is L shape structure, and connecting portion set up the tip on L shape structure level limit, and the vertical limit is hollow structure in the L shape structure at least.

For better avoiding leading the stretching device to shelter from the surface of a wound, will lead the stretching base and set up to L shape structure, the tip and the connecting portion on horizontal limit are connected, are connected with portion of leading stretching promptly, and vertical limit is connected with regulating part, makes the adjusting device in the regulating part be located the region beyond the patient's surface of a wound. In order to reduce the whole weight of the stretching device, the vertical edge of the L-shaped structure is of a hollow structure, or the L-shaped structure is formed by bending a hollow pipe, and in order to improve the structural strength of the stretching base, the oblique supporting piece can be arranged at the bending angle of the L-shaped structure.

Further, the adjusting part also comprises at least one connecting handle; one end of the connecting handle is connected with the adjusting rod, and the other end of the connecting handle is in threaded connection or interference fit with the vertical edge of the L-shaped structure.

When the stretching base adopts the L-shaped structure and the vertical edge is of the hollow structure, for more convenient and faster placement of the adjusting rod on the stretching base, a connecting handle can be fixed below the outer end of the short rod of at least one end after the adjusting rod is unfolded, the size of the connecting handle is matched with the vertical edge in the hollow structure, and the connecting handle and the vertical edge can be in threaded connection or in interference fit with a mode of fixing a rubber ring outside the connecting handle.

Furthermore, the adjusting rod can horizontally rotate around one end of the connecting handle, and in the actual use process, the position of the adjusting rod relative to the stretching part can be finely adjusted, so that the operation time of a patient is shortened.

Furthermore, the stretching part is a bone round needle capable of penetrating through the skin, the bone round needles in different shapes can be adopted according to the shape of the wound of the patient, such as a linear shape, an arc shape or a wave shape, but the length of the bone round needle needs to exceed the longitudinal length of the defective skin of the patient, and after the bone round needle alternately penetrates through the skin from top to bottom, two ends of the bone round needle are respectively reserved for 2-4 cm and exposed outside the skin; furthermore, the bone round needle is made of sterile titanium alloy or medical stainless steel, the outer diameter of the bone round needle is 2-3 mm, and the surface of the bone round needle is smooth.

In the process that the two osseous pins approach each other, the traction part is in surface contact with the skin, so that the traction tension on the local skin can be reduced, the pain of a patient can be relieved, and the consistency of the stretching amplitude of the skin can be ensured.

Further, the connecting part comprises a C-shaped groove used for wrapping the bone round needle and a first pressing rod; the first pressing rod is fixed on the stretching base and used for pressing the bone round needle in the C-shaped groove.

After the skin of a patient is fixed by the bone round needle, the two ends of the bone round needle exposed out of the defective skin of the patient are sleeved by the C-shaped groove, furthermore, the inner diameter of the C-shaped groove is 0.2-1mm larger than the outer diameter of the bone round needle, and the opening size of the C-shaped groove is controlled between 10 degrees and 80 degrees to prevent the bone round needle from falling off; for further preventing the bone round needle at the C inslot longitudinal sliding, first compressing tightly the pole from last to passing the upper portion that leads a base and C groove down, with both adoption threaded connection, and be equipped with the slipmat in the bottom of first compressing tightly the pole, compress tightly the bone round needle at C inslot through to the first compressing tightly pole of C groove screw in.

Compared with the prior art, the utility model has the advantages of as follows:

1. the skin stretching device has the advantages that the structure is simple, the installation is easy, the skin stretching amount of skin lesions of a patient can be accurately adjusted, and the operation process is simple and easy;

2. all parts of the skin stretching device of the technical scheme are positioned around the defective skin of the patient, so that the wound surface of the patient cannot be shielded, and the wound surface of the patient and the change of tissues around the wound surface can be conveniently and directly observed;

3. according to the shape of the defected skin of the patient, the osseous pin in different shapes is adopted to pull the skin, and the osseous pin is in surface contact with the skin boundary, so that the pulling tension on the local skin can be reduced, the pain of the patient can be relieved, the consistency of the stretching amplitude of the skin can be ensured, and the recovery of the patient can be facilitated.

Drawings

Fig. 1 is a perspective view of the distractor of the present invention in use.

Fig. 2 is a front view of the distractor of the present invention.

Detailed Description

The present invention will be further described with reference to the following embodiments. The same or similar reference numbers in the drawings of the embodiments of the present invention correspond to the same or similar components, and are only used for illustrative purposes, and are not to be construed as limiting the present invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; in the present invention, the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and do not indicate or imply that the indicated devices or elements must have a specific orientation or be configured in a specific orientation, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Example 1

A telescopic skin stretching device is suitable for a defective skin 8, and when the skin stretching operation is adopted for treatment, the longer opposite sides of the defective skin 8 are defined to be longitudinal, and the direction crossing the longitudinal sides is defined to be transverse according to the length and the width of a skin injury of a patient.

As shown in fig. 1, the distractor comprises two distractors 7 which are arranged at both longitudinal sides of a defect skin 8 and fix the edge of the defect skin 8 for penetrating the skin; the stretching part 7 is a bone round needle capable of penetrating through skin, the bone round needles in different shapes can be adopted according to different shapes of wounds of patients, such as linear type, arc shape or wave shape, and after the bone round needles penetrate through the skin up and down alternately, two ends of each bone round needle are exposed outside the skin by 2-4 cm; preferably, the bone round needle is made of sterile titanium alloy or medical stainless steel, the outer diameter of the bone round needle is 2-3 mm, and the surface of the bone round needle is smooth.

The distractor also comprises two adjusting parts for adjusting the distance between the two stretching parts 7, namely, the ends of the two bone round needles are fixed by the two adjusting parts in parallel.

The adjusting part comprises two stretching bases 1, two connecting parts 2 arranged at the lower parts of the stretching bases 1, an adjusting rod 3 transversely crossing the defect skin 8, an adjusting device 4 arranged at one end of the adjusting rod 3 and two connecting handles 6 arranged at the upper parts of the stretching bases 1.

As shown in fig. 2, the stretching bases 1 are L-shaped, and the two stretching bases 1 are disposed opposite to each other. In order to reduce the overall weight of the distractor, the vertical edge of the L-shaped structure is of a hollow structure and is in threaded connection with the connecting handle 6; or the L-shaped structure is formed by bending a hollow pipe; to improve the structural strength of the stretch base 1, the angle of the L-shaped structure may be provided with a diagonal stay 11.

The connecting part 2 comprises a C-shaped groove 21 welded and fixed at the bottom of the horizontal edge of the L-shaped tension base 1 and a first pressing rod 22 penetrating through the horizontal edge of the L-shaped tension base 1 and the upper part of the C-shaped groove 21 from top to bottom. The C-shaped groove 21 can be used for accommodating an exposed part of the bone round needle, the opening direction of the C-shaped groove is consistent with the direction of the L-shaped stretching base 1, the inner diameter of the C-shaped groove is 0.2mm larger than the outer diameter of the bone round needle, and the opening size of the C-shaped groove 21 is 45 degrees so as to prevent the bone round needle from falling off; the first pressing rod 22 is a first screw, is in threaded connection with the horizontal edge of the L-shaped stretching base 1 and the upper portion of the C-shaped groove 21, is provided with an anti-slip pad at the bottom of the first pressing rod 22, and presses the bone round pin at the bottom of the C-shaped groove 21 by screwing in the first pressing rod 22.

The adjusting rod 3 is formed by telescopically nesting 3-4 sections of short rods 31, the short rods 31 are hollow round tubes with scales, and the two short rods 31 which are nested with each other are connected through threads; one end of the short rod 31 having the largest outer diameter is threadedly coupled to the smaller short rod 31, and the other end of the short rod 31 having the largest outer diameter is provided on a connecting shank 6 to be horizontally rotatable about the connecting shank 6.

The adjusting structure 4 comprises a sleeve 41 and a tightening piece 42, the sleeve 41 is fixed on the other stretching base 1 through another connecting handle 6 which is in threaded connection with the vertical side of the L-shaped stretching base 1, one end of the short rod 31 with the smallest outer diameter in the adjusting rod 3 is in threaded connection with the larger short rod 31, and the other end of the short rod passes through the sleeve 41 and is in snap connection with the tightening piece 42. The tightening piece 42 is a threaded rod with an inner corner groove, the outer diameter of the threaded rod is larger than the inner diameter of the sleeve 41, and the threaded rod can be inserted into the groove of the tightening piece 42 through a wrench to control the short rod 31 to be screwed in until the effective length of the adjusting rod 3 is shortened to a proper length.

The distractor further comprises a second compression rod 5 used for compressing the adjusting rod 3, the second compression rod 5 is arranged on the inner side of the tightening piece 42, penetrates through the upper portion of the sleeve 41 from top to bottom, is in threaded connection with the sleeve 41, is screwed downwards, is screwed into the compression adjusting rod 3, maintains the effective length of the adjusting rod 3 unchanged, and guarantees the treatment progress of a patient.

The use process of the distractor in the embodiment is as follows:

when a patient needs to repair the wound surface by using a skin stretching operation, a linear or arc bone round needle is selected according to the shape of the edge of the wound surface of the patient, and vertically and alternately penetrates through two sides of the wound surface, so that two ends of the remaining bone round needle are respectively exposed outside the skin by 2-4 cm.

Meanwhile, the adjusting part can be assembled: firstly fixing a connecting handle 6 with the large end of the adjusting rod 3, fixing another connecting handle 6 with the sleeve 41, screwing the connecting handle 6 fixed with the adjusting rod 3 into the vertical edge of the transverse left L-shaped tension base 1, screwing the connecting handle 6 fixed with the sleeve 41 into the vertical edge of the transverse right L-shaped tension base 1, and during the period, always keeping the L-shaped tension bases 1 on the left side and the right side opposite, namely the openings of the L shapes are opposite. The large end of the adjustment lever 3 is then appropriately rotated about the connecting shaft 6 to align it with the sleeve 41 and the length of the adjustment lever 3 is adjusted to pass through the sleeve 41 and then connect it to the tightening member 42. Because the left and right L-shaped stretching bases 1 are arranged oppositely, the openings of the two C-shaped grooves 21 fixed below the horizontal edge of the L-shaped stretching base 1 are also arranged oppositely, then the two C-shaped grooves 21 are respectively inserted into one ends of the two bone round needles, and similarly, the two C-shaped grooves 21 of the other adjusting part are inserted into the other ends of the two bone round needles, so that the two adjusting parts are arranged in parallel.

Finally, the first pressing rod 22 is inserted into the horizontal edge of the L-shaped stretching base 1 and the upper part of the C-shaped groove 21 from top to bottom, and the bone round needle is pressed in the C-shaped groove 21.

After patient's skin extends to a certain degree, need insert the recess of tightening piece 42 through the spanner in, rotate tightening piece 42, make the effective length who adjusts pole 3 shorten, through the distance that the audio-visual adjustment of the number of turns of pivoted or regulation pole 3 shortens, the accurate skin volume of extending of adjusting. After adjusting to suitable position, pass sleeve 41 upper portion from last with second compression bar 5 down, through screwing down, the screw-in compresses tightly regulation pole 3, can accomplish this adjustment process.

Example 2

The difference between the embodiment and the embodiment 1 is that the adjusting part comprises two stretching bases 1, two connecting parts 2 arranged at the lower parts of the stretching bases 1, an adjusting rod 3 transversely crossing the defect skin 8, an adjusting device 4 arranged at one end of the adjusting rod 3, and a connecting handle 6 arranged at the upper part of the stretching bases 1.

The connecting handle 6 is in interference fit with the vertical edge of the L-shaped stretching base 1, namely a rubber ring is fixed outside the connecting handle 6 and pressed into the vertical edge of the L-shaped stretching base 1.

The adjusting structure 4 comprises a sleeve 41 and a tightening member 42, and the sleeve 41 is directly fixed on the other tensioning base 1.

The use process of the distractor in the embodiment is as follows:

when a patient needs to be treated by adopting a skin stretching operation, a linear or arc bone round needle is selected according to the shape of the edge of a wound surface of the patient, and vertically and alternately penetrates through two sides of the wound surface, so that two ends of the remaining bone round needle are respectively reserved with 2-4 cm and exposed outside the skin.

The four C-shaped grooves 21 of the two adjusting parts are inserted into the four ends of the two bone round needles, the openings of the C-shaped grooves 21 of the two bone round needle ends positioned on the same side are opposite to each other, and the opening direction of the C-shaped grooves 21 is consistent with the direction of the L-shaped stretching base 1, so that the L-shaped stretching bases 1 of the two bone round needle ends positioned on the same side are opposite to each other.

Next, the first pressing rod 22 is inserted into the horizontal side of the L-shaped distraction base 1 and the upper portion of the C-shaped groove 21 from top to bottom, and the bone round needle is pressed in the C-shaped groove 21.

Next, the connecting bar 6 is inserted into the vertical side of the left L-shaped tension base 1, and the adjusting lever 3 is rotated around the connecting bar 6 so that the other end thereof passes through the sleeve 41 and then is connected to the tightening member 42.

The skin stretching devices of the two embodiments have simple structure and easy installation, can accurately adjust the stretching amount of the skin around the wound surface of the patient, and the operation process is simple and easy; all parts of the skin stretching device are positioned around the defective skin of the patient, so that the wound surface of the patient is not shielded, and the wound surface of the patient and the change of tissues around the wound surface can be conveniently and directly observed.

It is to be understood that the present invention is not limited to the above-described embodiments. Any person skilled in the art can make variations and modifications possible on the basis of the above description without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims of the present invention.

Claims

1. A retractable skin distractor, comprising:

two stretching parts (7);

the two adjusting parts are used for adjusting the distance between the stretching parts (7);

the adjusting portion includes:

two stretching bases (1);

the two connecting parts (2) are arranged on the stretching base (1) and are used for fixing the stretching parts (7);

the adjusting rods (3) are arranged on the two stretching bases (1);

and the adjusting device (4) is arranged at one end of the adjusting rod (3) and is used for adjusting the effective length of the adjusting rod (3).

2. The telescopic skin distractor of claim 1, characterized in that the adjustment lever (3) is telescopically nested from a plurality of short rods (31).

3. A retractable skin stretching device according to claim 1 or 2, characterized in that said adjusting means (4) comprises a sleeve (41) and a tightening member (42) connected to the stretching base (1); the outer dimension of the tightening member (42) is larger than the sleeve (41); one end of the adjusting rod (3) penetrates through the sleeve (41) to be connected with the tightening piece (42).

4. A retractable skin distractor according to claim 3, characterized in that the distractor further comprises a second compression rod (5) passing through the sleeve (41) for compressing the adjustment rod (3).

5. The retractable skin stretching device according to claim 1, wherein the stretching base (1) is an L-shaped structure, the connecting part (2) is arranged at the end of the horizontal side of the L-shaped structure, and at least the vertical side of the L-shaped structure is a hollow structure.

6. The retractable skin distractor of claim 5, wherein the adjustment portion further comprises at least one connecting handle (6); one end of the connecting handle (6) is connected with the adjusting rod (3), and the other end of the connecting handle is in threaded connection or interference fit with the vertical edge of the L-shaped structure.

7. The retractable skin stretching device according to claim 6, wherein the adjusting lever (3) is horizontally rotatable around one end of the connecting handle (6).

8. The retractable skin distractor of claims 1, 2, 4, 5, 6 and 7 wherein the distraction portion (7) is a skin-penetrating bone pin.

9. The retractable skin distractor of claim 8, characterized in that the connecting part (2) comprises a C-shaped groove (21) for wrapping the osseous pin and a first compression bar (22); the first pressing rod (22) is fixed on the stretching base (1) and used for pressing the bone round needle in the C-shaped groove (21).

10. The retractable skin distractor of claim 8, wherein the bone pins are made of sterile titanium alloy or stainless steel, and have an outer diameter of 2-3 mm and a smooth surface.