CN2095642U - Freezing skin taking machine - Google Patents

Abstract

The utility model belongs to a medical device mainly used for skin grafting in a surgical operation, which is the improvement of the traditional drum skin taking machine, and makes use of freezing adhering principle to take skin. A board type heater, the coil pipe of a refrigerant evaporator, a heat-insulating layer of thermal insulating material, and a thermo-couple contact head are installed on the inner side of a drum face. The utility model has the advantages of strong adhesion force, convenient and rapid operation, no anesthesia for patients, no bleeding on wound surfaces, etc. So operation time can be shortened and operation quality can be improved.

Description

Freezing skin taking machine

This utility model belongs to medical apparatus and instruments, is mainly used in the surgical operation skin transplantation.

The plastic surgery operations overwhelming majority needs the row skin transplantation, thereby too busy to get away dermatome.At present both at home and abroad widespread usage is drum dermatome, and it mainly partly is made up of drum, axle, three on cutter.The drum face need stick Double-face gummed paper or be coated with glue at drum face and skin donor site surface before using, must inject anaesthetic at skin donor site earlier during bark fetching, on the other hand the handgrip handle is close to skin from an end of drum face then, and the formula propelling that is locked in a seesaw struggle of the rotation that requires drum and blade is agreed, and the skin graft of required size is taken off.This operation is difficult for grasp comes unstuck easily, makes skin graft imperfect, and wound surface is hemorrhage more, needs an assistant to use the topped wound surface of adrenal gland's saline gauze when bark fetching.The factor that influences the bark fetching success is a lot, particularly uses gummed paper or glue problem a lot, and having for many years sometimes, the doctor of clinical experience also feels a delicacy about.

The purpose of this utility model is to seek to adopt a kind of dermatome of new adhesion method, and does not re-use gummed paper or glue is made adhesion method.We know freezingly anesthesia, haemostatic effect are arranged but also can produce adhesion in medical practice.For example utilize freezing adhesive attraction can do pioneering operation.Therefore freezing adhesive attraction principle can be applied on the dermatome.According to document record and experiment confirm, freezing skin only produces local lesion, and the skin deep part structure is not caused permanent lesion and general reaction.At the skin freezing certain hour of certain area, temperature is controlled between 0～-30 ℃ does not have obvious damage to skin.Skin lesion increased the weight of gradually after temperature was lower than-40 ℃.Therefore the skin freezing temperature should be controlled at more than-40 ℃.Experimental results show that simultaneously at its needle point adhesion load of-20 ℃～-30 ℃ cryogenic freezing pins to reach 500 grams, this shows that with freezing adhesive attraction design dermatome be feasible.This freezing dermatome chilling temperature and time and thawing rate all should be able to strict be controlled, and easy to use.

This utility model is achieved by the following scheme: design and installation refrigerant evaporator and temperature measuring equipment, heater and heat-insulation layer on existing drum dermatome.

Description of drawings:

Fig. 1 is this utility model structural representation

Fig. 2 is this utility model longitudinal sectional drawing

Among the figure: 1 drum face, 2 sides, 3 graduated discs, 4 blade bearings, 5 handles, 6 knife clips, 7 handles, 8 dividing plates, 9 evaporator coil outlet tubes, 10 temperature thermocouple leads, 11 heater conductors, 12 vaporizer input pipes, 13 bumper bars, 14 outer shafts, 15 joints, 16 refrigerant evaporator coil pipes, axle in 17 baffle heaters, 18 thermocouple junction, 19 heat-insulation layers, 20.

Be described with reference to the accompanying drawings this utility model structure and usage.Identical with the drum dermatome of present widespread usage, freezing dermatome also has the semicircle drum of corrosion resistant plate face 1, side 2, outer shaft 14, interior axle 20, blade bearing 4, handle 5, knife clip 6.For realizing the purpose of freezing bark fetching, be fixed with in the inboard of drum face 1 and bend to and the consistent baffle heater 17 of drum face 1 shape, be used for that heating is thawed so that skin bit is taken off from the drum face.The installed inside refrigerant evaporator coil pipe 16 of baffle heater 17.In order to accurately measure heating of bulging face or the temperature when freezing, adopt thermocouple temperature measuring apparatus, thermocouple junction 18 is contained between the inboard and baffle heater 17 of bulging face 1.For reaching cryogenic temperature when the bark fetching rapidly, therefore topped layer of insulation material heat-insulation layer 19 on evaporator coil, making dividing plate 8 with sheet metal then, to be fixed on heat-insulation layer outer inner injury-free to protect.End at dividing plate 8 has several holes; By two joints 15 evaporator coil outlet tube 9 and input pipe 12 are installed, also from the hole, draw board-like hot device heating wires 11 and temperature thermocouple lead 10.Be fixed with bending handle 7 for easy to operate in axle 14 central authorities.

Using this utility model to implement freezing bark fetching and can adopt multiple refrigeration source, is that the refrigeration system of cold-producing medium and the input pipe of evaporator coil are connected and can be used with fluorine Lyons for example.This utility model adopts the thermocouple temperature measurement mode, and thermocouple wire and temp testing controlling system connection are got final product thermometric.

Use preceding with the dermatome component sterilization, the energized refrigeration system is started working, vaporizer is lowered the temperature bulging face rapidly, when temperature is reduced to-20 ℃, beginning is cut skin at skin donor site, operational approach is similar to traditional drum dermatome, begins to transport cutter after drum face and skin adherence, along with the rotation of drum face is slowly downcut skin.Stop freezingly, connect heater power source then bulging face is heated up, treat to take off after skin bit thaws and be placed on the room temperature normal saline and soak rewarming, skin graft can be transplanted.

The advantages such as the more traditional drum dermatome of this freezing skin taking machine has adhesion strong, easy to operate fast, and patient must not anaesthetize, the surface of a wound is not hemorrhage, thus operating time can greatly be shortened, improve the operation quality.

Claims (3)

1, a kind ofly is used for dermatoplastic freezing dermatome, include semicircle drum face 1, side 2, outer shaft 14 and interior axle 20, blade bearing 4, handle 5, knife clip 6, the inboard that it is characterized in that drum face 1 is fixed with and bends to and the consistent baffle heater 17 of bulging face shape, its inboard is equipped with between refrigerant evaporator coil pipe 16, drum face 1 inboard and the baffle heater 17 and is provided with thermocouple junction 18, topped layer of insulation material heat-insulation layer 19 on the evaporator coil is made dividing plate 8 with sheet metal then and is fixed on outside the heat-insulation layer.

2, freezing dermatome according to claim 1, an end that it is characterized in that dividing plate 8 has several holes, by two joints 15 evaporator coil outlet tube 9 and input pipe 12 are installed, draw board-like heater conductor 11 and temperature thermocouple lead 10 in other two holes.

3, freezing dermatome according to claim 1 is characterized in that outer shaft 14 central authorities are fixed with bending handle 7.

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