A hand-held cryosurgical device

Abstract

A handheld skin cryotherapy device addresses the problems associated with using liquid nitrogen as a cryocoolant for skin treatment, including: 1. extremely low utilization rate of liquid nitrogen cryocoolant; 2. waste due to liquid nitrogen evaporation; 3. secondary contamination of liquid nitrogen caused by cotton swabs entering and exiting the liquid nitrogen bottle; and 4. the problem of precise control over freezing temperature, time, and treatment area. The solution comprises a cryocoolant storage section, a cryotherapy head, and a cryocoolant output control section. Liquid nitrogen in the storage section flows into the cryotherapy head through the output control section to cool it. The cooled cryotherapy head then contacts the skin for cryotherapy. The advantages are: simple structure, ease of use, temperature control of the cryotherapy head by controlling the amount of liquid nitrogen entering the head, and treatment by direct contact between the low-temperature cryotherapy head and the skin, thus eliminating the waste caused by direct contact between the liquid nitrogen coolant and air, and preventing secondary contamination.

Description

Technical Field

[0001] This utility model relates to skin treatment or physiotherapy devices, and in particular to a handheld skin cryotherapy device. Background Technology

[0002] Cryotherapy is widely used in the treatment of skin diseases. Cryotherapy typically uses liquid nitrogen at very low temperatures to destroy abnormal cells. Common indications include warts, such as common warts, flat warts, and condyloma acuminata. Corns and calluses may also be treated with cryotherapy. For benign tumors, cryotherapy may be effective for seborrheic keratosis, syringomas, and dermatofibromas. It can also seal blood vessels in vascular abnormalities such as angiokeratomas and pyogenic granulomas. Furthermore, cryotherapy can be a treatment option for precancerous lesions such as actinic keratosis, and even for early-stage skin cancers, such as basal cell carcinoma, small lesions may be treated with cryotherapy. However, the freezing time and temperature must be carefully determined when treating different lesions to prevent frostbite to surrounding tissues.

[0003] Current cryotherapy techniques, such as the swab method or spray method using liquid nitrogen as the cryoprotectant, have several drawbacks. The swab method involves applying liquid nitrogen from a bottle to the affected skin with a cotton swab, while the spray method involves applying liquid nitrogen directly to the skin. Both methods result in extremely low liquid nitrogen utilization, with large amounts evaporating into the air, leading to waste. The repeated back-and-forth movement of the cotton swab between the affected skin and the liquid nitrogen bottle causes secondary contamination of the nitrogen. Furthermore, the spray method cannot guarantee accurate coverage, and the freezing temperature and time are difficult to control, making standard treatment impossible. Utility Model Content

[0004] To address the issues of extremely low utilization rate of liquid nitrogen cryotherapy fluid, liquid nitrogen evaporation, secondary pollution of liquid nitrogen, and the need for precise control of freezing temperature, time, and treatment area to ensure standardized treatment when using liquid nitrogen as a cryotherapy fluid for skin treatment, this utility model discloses a handheld skin cryotherapy device.

[0005] The technical solution adopted by this utility model to solve the technical problem is: a handheld skin cryotherapy device, comprising a cryotherapy liquid storage part, a cryotherapy head part, and a cryotherapy liquid output control part.

[0006] The aforementioned coolant storage section includes: a coolant storage chamber, a coolant output pipe, and a vent, wherein the coolant output pipe and the vent are connected to the coolant storage chamber;

[0007] The cryotherapy head includes: a cryotherapy head, a treatment head housing, a treatment head return spring, and a treatment head limiting mounting sleeve. The cryotherapy head is slidably mounted on the treatment head housing via the treatment head return spring and the treatment head limiting mounting sleeve. The cryotherapy head has a control cone-shaped protrusion, a cryotherapy chamber, and a cryotherapy chamber liquid inlet at its center.

[0008] The coolant output control section includes: a switch control ball, a control ball reset spring, and an output control housing;

[0009] The switch control ball is installed in the output control housing via a control ball return spring to form a one-way valve structure; the switch control ball is positioned between the control ball return spring and the control cone protrusion.

[0010] The output control housing is fixedly connected to the cryo-fluid output pipe and the treatment head housing, respectively, forming a structure in which the cryo-fluid storage cavity is connected to the cryo-fluid storage cavity via a switch control ball and a cryo-fluid inlet.

[0011] The beneficial effects of this invention are: simple structure, convenient use, temperature control of the cryotherapy head by controlling the amount of liquid nitrogen coolant entering the cryotherapy head, and treatment by using a low-temperature cryotherapy head in contact with the skin, thus solving the problems of evaporation waste caused by direct contact of liquid nitrogen coolant with air and secondary pollution of stored liquid nitrogen.

[0012] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic cross-sectional view of the structure of this utility model.

[0014] Appendix Figure 2 For the appendix Figure 1 A magnified view of part A.

[0015] Appendix Figure 3 This is a schematic diagram showing the rotation direction when this utility model is in use.

[0016] In the attached diagram, 1-1. Cryofluid storage chamber, 1-2. Cryofluid output pipe, 1-3. Vent, 2. Cryotherapy head, 2-1. Control cone protrusion, 2-2. Cryofluid chamber, 2-3. Cryofluid inlet, 3. Treatment head housing, 4. Treatment head return spring, 5. Treatment head limit mounting sleeve, 6. Switch control ball, 7. Control ball return spring, 8. Output control housing, 9. Temperature sensor, 10. Drain valve, 11. Liquid nitrogen cryofluid. Detailed Implementation

[0017] Referring to the attached drawings, a handheld skin cryotherapy device includes a cryotherapy fluid storage section, a cryotherapy head section, and a cryotherapy fluid output control section.

[0018] The cryogenic fluid storage section includes: a cryogenic fluid storage chamber 1-1, a cryogenic fluid output pipe 1-2, and an exhaust port 1-3, wherein the cryogenic fluid output pipe 1-2 and the exhaust port 1-3 are connected to the cryogenic fluid storage chamber 1-1.

[0019] The cryotherapy head includes: a cryotherapy head 2, a treatment head housing 3, a treatment head reset spring 4, and a treatment head limiting mounting sleeve 5.

[0020] The cryotherapy head 2 is slidably mounted on the treatment head housing 3 via the treatment head reset spring 4 and the treatment head limiting mounting sleeve 5. The cryotherapy head 2 is provided with a control cone protrusion 2-1, a cryo chamber 2-2 and a cryo chamber liquid inlet hole 2-3 at its center.

[0021] The coolant output control section includes: a switch control ball 5, a control ball reset spring 7, and an output control housing 8.

[0022] The switch control ball 6 is installed in the output control housing 8 via the control ball return spring 7 to form a one-way valve structure. The switch control ball 6 is located between the control ball return spring 7 and the control cone protrusion 2-1.

[0023] The output control housing 8 is fixedly connected to the cryo-fluid output pipe 1-2 and the treatment head housing 3 respectively, forming a structure in which the cryo-fluid storage cavity 1-1 is connected to the cryo-fluid 2-2 via the switch control ball 6 and the cryo-fluid inlet hole 2-3.

[0024] When using this utility model, follow the attached instructions. Figure 3 Rotate in the direction of arrow B to the treatment direction of cryotherapy head 2. This rotation direction is to prevent liquid nitrogen coolant from overflowing through vent holes 1-3.

[0025] The cryotherapy head 2 is pressurized. A control cone-shaped protrusion 2-1 on the cryotherapy head 2 pushes a switch control ball 6 to output liquid nitrogen from the control housing 8. Liquid nitrogen cryotherapy fluid 11 enters the cryotherapy head 2-2 through the liquid outlet of the control housing 8 and the cryotherapy chamber inlet 2-3, thus cooling the cryotherapy head 2 to the required treatment temperature. The amount of liquid nitrogen cryotherapy fluid 11 entering the cryotherapy chamber 2-2 determines the cooling of the cryotherapy head 2 to the required treatment temperature. The treatment objective is achieved through the contact time between the cryotherapy head 2 and the skin.

[0026] In this embodiment of the invention, a temperature sensor 9 is provided on the cryotherapy head 2. The temperature of the cryotherapy head 2 is obtained through the temperature sensor 9, and the amount of liquid nitrogen cryotherapy liquid 11 entering the cryo-cavity 2-2 is controlled.

[0027] In this embodiment of the invention, the treatment head housing 3 is provided with a drain valve 10 that communicates with the freezing chamber 2-2. The drain valve 10 resolves the negative pressure in the freezing chamber 2-2 and drains excess nitrogen cryocooling liquid 11, thereby increasing the temperature of the cryogenic treatment head 2.

[0028] To address the precise control of temperature and treatment time, this embodiment of the invention provides a temperature or time display screen on the cryo-liquid storage chamber 1-1.

[0029] In this embodiment of the invention, the need for treating different areas is met by replacing the cryotherapy head 2.

Claims

1. A handheld skin cryotherapy device, comprising a cryotherapy fluid storage section, a cryotherapy head section, and a cryotherapy fluid output control section, characterized in that: The cryogenic fluid storage section includes: a cryogenic fluid storage chamber (1-1), a cryogenic fluid output pipe (1-2), and an exhaust port (1-3), wherein the cryogenic fluid output pipe (1-2) and the exhaust port (1-3) are connected to the cryogenic fluid storage chamber (1-1); The cryotherapy head includes: a cryotherapy head (2), a treatment head housing (3), a treatment head reset spring (4), and a treatment head limiting mounting sleeve (5); The cryotherapy head (2) is slidably mounted on the treatment head housing (3) via the treatment head reset spring (4) and the treatment head limiting mounting sleeve (5). The cryotherapy head (2) is provided with a control cone protrusion (2-1), a cryo chamber (2-2) and a cryo chamber liquid inlet hole (2-3) at its center. The coolant output control section includes: a switch control ball (6), a control ball reset spring (7), and an output control housing (8). The switch control ball (6) is installed in the output control housing (8) via the control ball return spring (7) to form a one-way valve structure. The switch control ball (6) is located between the control ball return spring (7) and the control cone protrusion (2-1). The output control housing (8) is fixedly connected to the cryo-fluid output pipe (1-2) and the treatment head housing (3) respectively, forming a structure in which the cryo-fluid storage cavity (1-1) is connected to the cryo-fluid storage cavity (2-2) via the switch control ball (6), the cryo-fluid inlet hole (2-3) and the cryo-fluid storage cavity (2-2).

2. A hand-held cryosurgical apparatus according to claim 1, wherein: The cryotherapy head (2) is equipped with a temperature sensor (9).

3. A hand-held cryosurgical apparatus according to claim 1 or 2, wherein: The treatment head housing (3) is provided with a discharge valve (10) that communicates with the freezing chamber (2-2).

4. A hand-held cryosurgical apparatus according to claim 1 or 2, wherein: The cryogenic storage chamber (1-1) is equipped with a temperature or time display screen.

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