CN103829990B - Negative-pressure type skin external expander - Google Patents

Abstract

The invention relates to a skin expander. The invention discloses a negative pressure type skin external dilator, which comprises an air cushion type negative pressure cover, a right angle conversion tube, a connecting tube, and a negative pressure generating device. One end of the right angle conversion tube is connected to the top of the air cushion type negative pressure cover. The other end of the right-angle conversion pipe is connected with the connecting pipe, and the connecting pipe is connected with the negative pressure generating device. The invention can fully fit the parts of different curved surfaces of the human body, and can also fit the parts with more hair, and can form a closed local space. work efficiency.

Description

Negative pressure external skin dilator

technical field

The invention relates to a skin expander, in particular to a negative pressure external skin expander.

Background technique

Tissue expansion is a surgical method that uses the expansion of tissue expanders to obtain extra skin and soft tissue for skin defect repair and organ reconstruction. Tissue expansion is a revolutionary achievement in the field of plastic surgery in the past 20 years. It is the most widely used in the treatment of scars and body surface tumors. It solves many difficult clinical problems and replaces some skin grafts and flaps. . The application of skin expansion not only improves the quality of plastic surgery, but also reduces the surgical injury.

Expansion can increase the area of skin, and there are three sources of extra skin and soft tissue: ① tissue growth induced by expansion stimulation, and skin growth exists both during the expansion process and after the expansion flap is transferred. The expansion of cell proliferation and the synthesis of intercellular substances contribute to the expansion of the skin area; the expansion of the flap transfer contributes to the restoration of skin thickness. ②Creep effect, this effect is the characteristic that the area or length of biological tissue expands or increases under the action of force, but the area or length of biological tissue cannot be completely restored after the action of force is released. The area or length of the part that cannot be restored is the increase in the area or length of the tissue. Skin area growth due to tissue creep effects is part of the total skin area growth in the expansion zone, but is eventually replaced by true growth of histiocytes after the expansion tissue graft. ③The displacement of skin and soft tissue is the characteristic that the skin of the body moves toward the direction of the force source under force. It constitutes the peripheral part of the skin in the expansion zone, and is also a component of the increase in the area of the expansion zone. This part of the skin and soft tissue will be partially restored to the original position during the flap transfer, and the other part will eventually be replaced by the real growth of tissue cells after the expanded tissue transplantation.

The classic dilation is internal dilation, and its basic steps include: selection of dilation area and dilator, dilator embedding, intraoperative water dilation and postoperative regular water dilation, etc. Due to the many technical steps involved and the long treatment cycle, problems are prone to occur. Hematoma, infection, dilator exposure, and flap blood supply disturbance after expansion are the most common complications of skin and soft tissue expansion, with an incidence rate of about 10%. Since dilator placement usually requires hospitalization, water injection also requires a long-term process, resulting in relatively high costs. In addition, because of the need for needles for water injection, some children have a lot of fear.

The external skin expander is mainly designed for the above shortcomings. It mainly uses the equipment to continuously pull the skin tissue outside the skin. With the increase and passage of the traction weight, the skin around the lesion (such as: scar) is gradually extended. , to provide "extra" skin tissue for repair. The traditional skin external expansion device is composed of an external expander and a traction frame. The expander is composed of a traction chuck, a traction arm and its adjustment structure. The external dilator can be operated at home to "generate" new skin and provide the possibility for the repair of tissue defects. Compared with internal expansion, it reduces one hospitalization for implanting the dilator, and alleviates the medical difficulty of seeking medical treatment. At present, external expanders can be divided into two categories: one is simple daily necessities such as simple clothespins; the other is relatively expensive special instruments, the operation is relatively complicated, and the cost increases.

Contents of the invention

The purpose of the present invention is to provide a negative pressure external skin dilator, which has a short treatment period for skin expansion, low treatment cost, and is not prone to complications, and can be set according to the patient's individual pain tolerance. The pressure and pain are small, and the operation is simple. It can fully fit the parts of different curved surfaces of the human body, and can also fit the parts with more hair, and can form a closed local space.

In order to achieve the above object, the present invention has the following technical solutions:

A negative pressure skin external dilator of the present invention comprises an air cushion type negative pressure cover, a right angle conversion tube, a connecting tube, and a negative pressure generating device. One end of the right angle conversion tube is connected to the top of the air cushion type negative pressure cover, and the right angle The other end of the conversion pipe is connected with the connection pipe, and the connection pipe is connected with the negative pressure generating device.

Wherein, the air cushion type negative pressure cover includes a cover body, an air bag, and an air valve, the air bag is connected to the edge of the bottom of the cover body, the air valve is fixed on the cover body, and the air valve communicates with the air bag.

Wherein, the top of the right-angle conversion tube is provided with a through hole, and the through hole is provided with a top cover.

Wherein, the cover body is in the shape of a truncated cone, and the cover body is made of transparent material.

Wherein, the cross section of the airbag is tubular, and the airbag is made of medical silica gel.

Wherein, the air valve includes an air channel, an air channel cover, and a spring, the air channel cover is connected with the air channel, and the spring bears on the air channel cover.

Owing to taking above technical scheme, the advantage of the present invention is:

1 The skin expansion of the present invention has a short treatment period, low treatment cost, and is not easy to produce complications. Moreover, different expansion pressures can be set according to the patient's individual pain tolerance, which is less painful and can fully fit different curved surfaces of the human body. It can also fit the part with more hair and form a closed local space.

2. The present invention is easy to operate and easy to adjust, can eliminate the patient's fear, solve the problem of the patient's difficulty in seeking medical treatment, and improve work efficiency.

Description of drawings

Fig. 1 is the schematic diagram of overall structure of the present invention;

Fig. 2 is a schematic diagram of the air cushion negative pressure mask of the present invention.

In the figure: 1. Air cushion type negative pressure cover; 2. Right-angle conversion tube; 3. Connecting tube; 4. Negative pressure generating device; 5. Cover body; 6. Air bag; 7. Air valve; 8. Top cover.

detailed description

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Referring to Fig. 1-Fig. 2, a kind of negative pressure type skin external dilator of the present invention is made up of air cushion type negative pressure cover, right-angle conversion tube, connecting tube, negative pressure generating device, and one end of described right-angle conversion tube is connected on the air cushion The top of the type negative pressure cover, the other end of the right-angle conversion pipe is connected with the connecting pipe, and the connecting pipe is connected with the negative pressure generating device.

The air cushion type negative pressure cover is composed of a cover body, an air bag, and an air valve. The air bag is connected to the edge of the bottom of the cover body, and the air valve is fixed on the cover body, and the air valve communicates with the air bag. The cover body is in the shape of a truncated cone, and the cover body is made of transparent material. The air cushion negative pressure mask can clearly show the condition of the attracted skin. The lower edge of the air cushion negative pressure mask has an airbag that can adjust the pressure, which can fully fit different undulating body surfaces or parts with more hair to form a closed local environment. The air cushion negative pressure cover is made of PVC material, which is durable, and the air cushion is made of medical silicone, which is soft and elastic. The air cushion negative pressure mask is non-toxic and harmless, and can be in contact with human skin for a long time.

A through hole is arranged on the top of the right-angle conversion tube, and a top cover is arranged on the through hole.

The air valve includes an air passage, an air passage cover and a spring, the air passage cover is connected with the air passage, and the spring bears on the air passage cover.

The negative pressure generating device adopts a portable negative pressure suction device, which can continuously generate negative pressure, and the negative pressure can be adjusted. The control panel of the air cushion negative pressure cover can clearly display the central negative pressure suction, which is suitable for patients visiting the hospital. The negative pressure generating device is composed of a motor, an impeller, a motor control circuit and a casing.

Apparently, the above-mentioned implementation of the present invention is only an example for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims (2)

1. a negative-pressure type skin external expander, it is characterised in that: include air-cushion type negative pressure cover, Right angle crossover connection, connecting tube, negative pressure generating device, one end of described right angle crossover connection is connected to The top of air-cushion type negative pressure cover, the other end of right angle crossover connection is connected with described connecting tube, described Connecting tube is connected with negative pressure generating device；Described air-cushion type negative pressure cover includes cover body, air bag, gas Door, described air bag is connected on the edge bottom cover body, and valve is fixed on cover body, and valve Connect with air bag；Negative pressure generating device can persistently produce negative pressure, and negative pressure can regulate, by gas The control panel of cushion negative pressure cover can clearly display centre vacuum suction, be suitable to hospital admission Patient uses, and negative pressure generating device is made up of motor, impeller, circuit for controlling motor, shell； Described cover body is truncated cone-shaped, and described cover body uses transparent material；Described balloon cross-sectional is tubulose, Described air bag uses medical silica-gel；Described valve includes air flue, air flue lid, spring, described gas Drive cap is connected with air flue, and spring top is on air flue lid.

2. a kind of negative-pressure type skin external expander as claimed in claim 1, it is characterised in that: institute Stating crossover connection top, right angle and be provided with through hole, this through hole is provided with top cover.