CN85205169U

CN85205169U - Microwave baker for therapy of the lymphedema

Info

Publication number: CN85205169U
Application number: CN 85205169
Authority: CN
Inventors: 王珊
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 1985-11-16
Filing date: 1985-11-16
Publication date: 1987-01-28

Abstract

The utility model uses the principle of heating using microwaves and designs an enclosed drum shape microwave baker. A plurality of rectangle antennae are installed in the baker, two sliding metal lines are installed on the antennae, and the metal lines can conveniently adjust input waves and impedance match. The utility model has the advantages of simple structure, easy manufacturing, high thermal inefficiency and good heating homogeneity, when treated, patients feel comfortable, and the clinical effective rate reaches 100%; the utility model is widely used for treating various lymphedema needing thermotherapy.

Description

Microwave baker for therapy of the lymphedema

This utility model belongs to medical electronic apparatus

The fundamental cause of lymphedema morbidity is that Lymphangiopathy alters into the lymph fluid backflow obstruction.Usually more effective Therapeutic Method is the employing heating therapy, by to the thermostimulation repeatedly of ill limbs, to improve intravital lymph fluid circulation of limb and metabolism.

Thermotherapy commonly used at present generally all adopts common resistance wire or Infrared Heating directly to dry by the fire the treatment limbs, but the major defect of this direct electric heating method is: 1. owing to be direct electric heating, therefore patient's environment temperature is higher, the seance patient's loss of getting off is bigger, and fervescence, particularly in summer, patient is difficult to bear especially.The course of treatment long, generally want more than 20 times, and the time of each treatment was generally wanted more than 1 hour.3. power consumption is big.

This utility model is at above-mentioned shortcoming, and the ultimate principle of utilization microwave heating has designed a kind of microwave baker for therapy for the treatment of lymphedema, and its structure as shown in Figure 1 and Figure 2.

Fig. 1 is the sketch map of lymphedema microwave baking treatment device, and wherein 1 is microwave power source.2 are microwave baker for therapy, and 3 is antenna.

Fig. 2 (a) is the cross sectional representation of microwave baker for therapy, and wherein 2 is casing, and 3 is antenna, and 4 is the limb support frame made from engineering plastics or other dielectric material, and 5 is actuating doors, and 6 is feeder.

Fig. 2 (b) is the longitudinal section sketch map of microwave baker for therapy, and wherein 7 is the metal wedge, and 8 is the sliding metal line, and 9 is the shielding cloth cover.

The microwave baker for therapy of design treatment lymphedema generally will be from improving the thermal efficiency, heating uniformity and preventing that microwave power from leaking several aspects and considering.

This utility model is the cylinder type casing 2 with sealing, and the casing of this cavity resonator structure can improve the degree of being concentrated into of field, and crooked tank wall can more concentrate on limbs with microwave field, in order to the raising efficiency of heating surface, and can prevent that microwave power from leaking.

In order to improve heating uniformity, this utility model uses square type antenna 3, and square type antenna 3 is the closed-loop path that constitutes with long lead, its conductor length L=n λ/2, and wherein λ is the wavelength of microwave power source, n is a positive integer.Some such square type antennas 3 of inwall uniform device along casing 2.Be equally divided into two the tunnel by the microwave source electric current of feeder 6 and be fed to (A, B 2 points among Fig. 2 (b)) on the every square type antenna 3, then the electric current of 2 of A, B has symmetry, and design the time make A, B point-to-point transmission apart from d ≠ N λ/2, (N is a positive integer), make the phase shifting of standing wave electric current on the antenna, so that the uniform heating effect is arranged on limbs.Simultaneously, make the polarised direction of aerial radiation electric wave parallel during this utility model design, in order to improving the thermal efficiency with limbs.This utility model reality can adopt three above-mentioned antennas 3, and is so comparatively reasonable.Two nugget genus lines of slide 8 can be housed on square type antenna 3.Can know, when along square type length of antenna lead when the length in a week is the integral multiple of λ/2, the antenna resonance of square type, 2 input reactances of this moment A, B partly are zero, power transmission efficiency is the highest, can reach the purpose of regulating input vswr easily so regulate the position of the metal line of slide 8 on the square type antenna 3.

For the field of undue concentration between two end faces that disperse limbs and casing, on two end faces of casing 2, can install number of metal wedge 7, thereby more help improving heating uniformity.

This utility model also can be opened an actuating doors 5 in the side of casing 2, and is convenient in order to operation of medical workers.Actuating doors 5 requires to closely cooperate with casing, and adopts choke, to prevent Power leakage.

An end face at casing 3 has a circular hole, and circular orifices is connected to the cover made from shielding cloth 9.There is excellent contact in shielding cloth and aperture.When limbs are put on the limb support frame 4 that casing 2 usefulness engineering plastics or other dielectric material do along cover, cover 9 and limbs can be tightened, to prevent Power leakage.

The utility model is after tested: the isolation between three antenna ports when it loads is greater than 20 decibels, and in 60 megahertz bandwidth and under the load condition, the standing-wave ratio maximum is about about 2, and the standing-wave ratio of centre frequency is littler. Limbs were warming up to rapidly in 5 minutes about 39 °～42 ℃, and the heating position each point temperature difference is not more than 2 ℃, and Power leakage is low, meets national safety standard fully.

This utility model is through clinical use, its clinical effective rate is 100%, acceptance rate is higher than 75%, and the course of treatment, by electrothermal way about 20 times shortened to about 15 times, each baking treatment time also shortens, and because thermal efficiency height of the present utility model, than electrothermal way power saving more than 3/4 at least, and the patient felt comfortably cool when baking was treated, and did not influence ambient temperature.

This utility model can be widely applicable for the various lymphedema treatments that need thermotherapy, and needs the similar disease of thermotherapy also can utilize this utility model to other, treats by suitable output and irradiation time.

Claims

1, a kind of microwave baker for therapy for the treatment of lymphedema, it is characterized in that it is the cylinder type of sealing that the casing 2 of case is treated in this baking, along casing 2 inwalls square type antenna 3 is housed evenly, the bracing frame 4 that useful dielectric material is made in the case, on an end face of cylinder, have a circular hole, circular orifices is connected to the cover made from shielding cloth 9, and the case side has an actuating doors 5.

2, case is treated in baking according to claim 1, it is characterized in that above-mentioned antenna 3 has three, is separated by 120 ° between the every antenna 3.

3, case is treated in baking according to claim 2, it is characterized in that above-mentioned antenna 3 is equipped with two sliding metal lines 8 on every.

4, treat casees according to claim 1,2,3 described bakings, it is characterized in that device number of metal wedge 7 on two end face inwalls of above-mentioned casing 2.