CN106902456B

CN106902456B - Resonant cavity for radio frequency thermal therapy instrument and radio frequency thermal therapy instrument

Info

Publication number: CN106902456B
Application number: CN201710127592.7A
Authority: CN
Inventors: 张棣; 景志强
Original assignee: Zhan Jiajing
Current assignee: Zhan Jiajing
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2023-05-16
Anticipated expiration: 2037-03-06
Also published as: CN106902456A

Abstract

The invention provides a resonant cavity for a radio frequency thermal therapeutic instrument, which comprises an outer cylinder, a middle cylinder and an inner cylinder; the outer cylinder, the middle cylinder and the inner cylinder are all cylinders; the lower surfaces of the outer cylinder, the middle cylinder and the inner cylinder are arranged on the same horizontal plane, and a circular cavity is formed between the outer cylinder and the middle cylinder; the height of the middle cylinder is larger than that of the inner cylinder; an annular slit is arranged between the middle cylinder and the inner cylinder; a sliding rail is arranged in the circular cavity, and a radio frequency power access device is arranged on the sliding rail; the radio frequency power access device is provided with a pair of dovetail grooves, and the bottoms of the dovetail grooves are provided with elastic beryllium bronze layers. The resonant cavity is a heavy-duty resonant cavity, has a simple structure, is single-head self-coupled and single-fed, can adjust the electromagnetic field intensity according to different connection positions of radio frequency power lines by utilizing the adjusting plate, adjusts the output power by utilizing the adjusting coupling, is parallel to the axis, and is uniform in electric field absorbed by various body tissues, so that the body heating part can not be excessively scalded.

Description

Resonant cavity for radio frequency thermal therapy instrument and radio frequency thermal therapy instrument

Technical Field

The invention belongs to the field of physiotherapy equipment, and particularly relates to a resonant cavity for a radio frequency thermotherapy instrument.

Background

At present, various diseases in the thermal therapy technology are commonly applied in clinic, such as gastric cancer, lung cancer, pancreatic cancer and the like, and the thermal therapy technology can be divided into two types of biological thermal therapy and physical thermal therapy, wherein the physical thermal therapy utilizes a physical method to generate thermal therapy effect, and the thermal therapy effect achieves the aim of treatment by directly generating heat on the superficial or deep part of the body of a patient. The existing radio frequency thermal therapeutic apparatus generally only adjusts the size of a radio frequency power source, and the resonant cavity has no adjusting function, so that the application is limited to a certain extent.

Disclosure of Invention

Technical problems: in order to solve the defects in the prior art, the invention provides a resonant cavity for a radio frequency thermal therapeutic instrument.

The technical scheme is as follows: the invention provides a resonant cavity for a radio frequency thermal therapeutic instrument, which comprises an outer cylinder, a middle cylinder and an inner cylinder; the outer cylinder, the middle cylinder and the inner cylinder are all cylinders; the upper surfaces of the outer cylinder and the middle cylinder are arranged on the same horizontal plane, the lower surfaces of the outer cylinder and the inner cylinder are arranged on the same horizontal plane, and a circular cavity is formed between the outer cylinder and the middle cylinder; the height of the middle cylinder is larger than that of the inner cylinder; an annular slit is arranged between the middle cylinder and the inner cylinder; a sliding rail is arranged in the circular cavity, and a radio frequency power access device is arranged on the sliding rail; the radio frequency power access device is provided with a pair of dovetail grooves, and the bottoms of the dovetail grooves are provided with elastic beryllium bronze layers.

As an improvement, the anti-collision device also comprises an anti-collision strip, wherein the anti-collision strip is arranged at the top of the inner cylinder.

As a further improvement, the resonant cavity is self-coupled at one end, is fed at one end, and the width of the slit is 0.5-1.5cm, preferably 1cm.

As another improvement, the resonant cavity is a heavy-duty resonant cavity, the outer cylinder of the resonant cavity is a metal outer cylinder, the middle cylinder is a metal middle cylinder, and the inner cylinder is a metal inner cylinder.

The invention also provides a radio frequency thermal therapeutic instrument which comprises the resonant cavity and a radio frequency power source which are connected with each other.

The beneficial effects are that: the resonant cavity provided by the invention is a heavy-entry resonant cavity, has the advantages of simple structure, single-head self-coupling, single feed, low cost and convenience in use, and can be used for adjusting the coupling of electromagnetic fields according to different connection positions of radio frequency power lines by using the adjusting plate, so that the resonant cavity works in an optimal near-medium state. The electric field is parallel to the axis, namely, parallel to each body tissue of the body, so that the electric field intensity entering each body tissue is the same, and the heating part of the body can not be excessively scalded.

In particular, the present invention has the following outstanding advantages over the prior art:

(1) The resonant cavity of the radio frequency thermal therapeutic instrument provided by the invention can be used for treating leg and foot diseases, adopts a radio frequency cavity form, and the receptor and the cavity which are treated are non-contact.

(2) The size of the cavity of the conventional therapeutic apparatus is long due to the long wavelength of radio frequency, so that the therapeutic apparatus is inconvenient to treat, the size of the resonant cavity is greatly reduced, the re-entrant cavity consists of three metal cylinders, an outer cylinder, a middle cylinder and an inner cylinder, the required cavity is formed among the three cylinders, and the size of the cavity is determined through strict calculation and repeated experiments.

(3) The feeding mode of the radio frequency thermotherapy instrument adopts single-port self-coupling feeding, and has simple structure and convenient adjustment. Principle of: the radio frequency power generated by the radio frequency power source is sent to the feed port through the feed circuit, and then energy is coupled to the resonant cavity through the self-coupling device. The coupling device works and is in a critical working state, so that radio frequency energy can enter the resonant cavity to the greatest extent, then an electric field is excited into a longitudinal electric field in the internal treatment cavity through the coupling of the open-circuit capacitor between the inner cylinder and the middle cylinder, wherein the electric field is parallel to the axis of the cavity, the legs of a patient are placed in the treatment cavity, and the legs are also parallel to the axis of the cavity, so that the electric field intensity among tissues of the legs is the same, the tissues of the legs are heated uniformly, and the pain caused by local overheating of the patient is avoided.

(4) The electric field in the resonant cavity is parallel to the axis of the resonant cavity, so that each tissue of the leg can be heated uniformly, and an end face capacitor is formed between the middle cylinder and the inner cylinder and can be coupled with the electric field in the inner cylinder, so that the electric field intensity in the middle cylinder is further enhanced.

Drawings

Fig. 1 is a schematic structural view of a resonant cavity for a radio frequency hyperthermia instrument of the invention.

Fig. 2 is an enlarged view of a portion of a resonant cavity.

Fig. 3 is an enlarged view of a portion of a resonant cavity.

Fig. 4 is an electric field diagram of a resonant cavity.

Fig. 5 is a state diagram of the use of the resonant cavity for the rf hyperthermia instrument of the present invention.

Detailed Description

The resonant cavity for the RF hyperthermia instrument of the present invention will be further described.

Example 1

The RF thermal therapeutic instrument includes one resonant cavity and one RF power source.

The resonant cavity of the radio frequency thermal therapeutic instrument, see figure 1, comprises an outer cylinder 1, a middle cylinder 2 and an inner cylinder 3; the outer cylinder 1, the middle cylinder 2 and the inner cylinder 3 are all cylinders; the upper surfaces of the outer cylinder 1 and the middle cylinder 2 are arranged on the same horizontal plane, the lower surfaces of the outer cylinder 1 and the inner cylinder 3 are arranged on the same horizontal plane, and a circular cavity 4 is formed between the outer cylinder 1 and the middle cylinder 2; the height of the middle cylinder 2 is larger than that of the inner cylinder 3; a ring-shaped slit 5 is arranged between the middle cylinder 2 and the inner cylinder 3; a sliding rail 6 is arranged in the circular cavity 4, and a radio frequency power access device 7 is arranged on the sliding rail 6, as shown in fig. 2; the radio frequency power access device 7 is provided with a pair of dovetail grooves 8, as shown in fig. 3, and an elastic beryllium bronze layer 9 is arranged at the bottom of each dovetail groove 8. The anti-collision device further comprises an anti-collision strip 10, and the anti-collision strip 10 is arranged at the top of the inner cylinder 3. The resonant cavity is a heavy-duty resonant cavity, the outer cylinder 1 of the resonant cavity is a metal outer cylinder, the middle cylinder 2 is a metal middle cylinder, and the inner cylinder 3 is a metal inner cylinder.

Wherein the width of the slit 5 is 1cm.

Example 2

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the width of the slit 5 is 0.5cm.

Example 3

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the width of the slit 5 is 1.5cm.

Example 4

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the width of the slit 5 is 0.9cm.

Example 5

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the width of the slit 5 is 1.1cm.

Comparative example 1

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the height of the middle cylinder 2 is consistent with that of the inner cylinder 3.

Comparative example 2

The rf hyperthermia apparatus is basically the same as embodiment 1, except that: the annular slit 5 is not arranged between the middle cylinder 2 and the inner cylinder 3.

The patient with arthritis is treated by the radio frequency thermotherapy device for one month, and the curative effects are shown in table 1.

Efficacy evaluation criteria:

1. and (3) curing: the joint pain disappears and the movement is free; improvement: pain relief, improvement of joint function; the method is characterized in that: the symptom function is not improved.

2. For pain, visual simulated pain score VAS was used. The pain level is indicated by a total of 11 numbers 0-10, 0 indicating no pain, 10 indicating the most pain, and the patient selects one of the 11 numbers to represent the pain level according to his pain level. 0 point: no pain; the 3-point method comprises the following steps: slight pain, tolerated by the patient; 4-6 minutes: patients are painful and affect sleep and can tolerate; 7-10 minutes: patients have stronger pain, and the pain is intense or hard. Analgesic score = (pre-treatment pain score-post-treatment pain score)/pre-treatment pain score x 100%.

The effect is shown: analgesic score >60%, effective: the pain relieving score is 30% -60%, and the pain relieving score is ineffective: the analgesic score was <30%.

	Has obvious effect%	Effective%	Ineffectiveness%
				Example 1	95	5	0
Example 2	70	25	5
				Example 3	70	25	5
Example 4	80	15	5
				Example 5	80	15	5
Comparative example 1	60	20	10
				Comparative example 2	50	25	25

Claims

1. A resonant cavity for a radio frequency hyperthermia instrument, characterized in that: comprises an outer cylinder (1), a middle cylinder (2) and an inner cylinder (3); the outer cylinder (1), the middle cylinder (2) and the inner cylinder (3) are all cylinders; the upper surfaces of the outer cylinder (1) and the middle cylinder (2) are arranged on the same horizontal plane, the lower surfaces of the outer cylinder (1) and the inner cylinder (3) are arranged on the same horizontal plane, and a circular cavity (4) is formed between the outer cylinder (1) and the middle cylinder (2); the height of the middle cylinder (2) is larger than that of the inner cylinder (3); an annular slit (5) is arranged between the middle cylinder (2) and the inner cylinder (3); a sliding rail (6) is arranged in the circular cavity (4), and a radio frequency power access device (7) is arranged on the sliding rail (6); the radio frequency power access device (7) is provided with a pair of dovetail grooves (8), and an elastic beryllium bronze layer (9) is arranged at the bottom of each dovetail groove (8).

2. A resonant cavity for a radiofrequency hyperthermia instrument as set forth in claim 1, characterized in that: the anti-collision device further comprises an anti-collision strip (10), wherein the anti-collision strip (10) is arranged at the top of the inner cylinder (3).

3. A resonant cavity for a radiofrequency hyperthermia instrument as set forth in claim 1, characterized in that: the width of the slit (5) is 0.5-1.5cm.

4. A resonant cavity for a radiofrequency hyperthermia instrument as set forth in claim 1, characterized in that: the resonant cavity is a heavy-duty resonant cavity, the outer cylinder (1) of the resonant cavity is a metal outer cylinder, the middle cylinder (2) is a metal middle cylinder, and the inner cylinder (3) is a metal inner cylinder.

5. A radio frequency hyperthermia instrument, characterized in that: comprising the resonator of claim 1 and a radio frequency power source connected to each other.