CN111437029B - Cold-freezing therapeutic device in scar and control method thereof - Google Patents
Cold-freezing therapeutic device in scar and control method thereof Download PDFInfo
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- CN111437029B CN111437029B CN202010347700.3A CN202010347700A CN111437029B CN 111437029 B CN111437029 B CN 111437029B CN 202010347700 A CN202010347700 A CN 202010347700A CN 111437029 B CN111437029 B CN 111437029B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00452—Skin
- A61B2018/0047—Upper parts of the skin, e.g. skin peeling or treatment of wrinkles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00732—Frequency
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00761—Duration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/0091—Handpieces of the surgical instrument or device
- A61B2018/00916—Handpieces of the surgical instrument or device with means for switching or controlling the main function of the instrument or device
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0293—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument interstitially inserted into the body, e.g. needle
Abstract
The invention provides a cold-freezing treatment device in scars, wherein a through hole is formed in a shell, a driving piece and a needle tube assembly are arranged in the shell, and the driving piece is used for driving the tip end of the needle tube assembly to extend out of the shell or move back into the shell through the through hole. The needle tube assembly comprises an injection tube, and the injection tube is provided with a liquid nitrogen input port, a liquid nitrogen injection port and an exhaust port; or the needle tube assembly comprises an injection tube and an exhaust tube which are arranged side by side, the injection tube is provided with a liquid nitrogen input port and a liquid nitrogen injection port, and the exhaust tube is provided with a vent hole; or the needle tube assembly comprises a large needle tube and a small needle tube which are sleeved with each other, one of the large needle tube and the small needle tube is an injection tube, the other one of the large needle tube and the small needle tube is an exhaust tube, the injection tube is provided with a liquid nitrogen input port and a liquid nitrogen injection port, and the exhaust tube is provided with a vent hole. The invention also provides a control method of the device for treating the cold in the scar. The invention can realize the precise cryotherapy of scar tissues, prevent the complications of the traditional scar surface cryotherapy, improve the treatment comfort and reduce the recurrence rate of the scar treatment.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an in-scar freezing treatment device and a control method thereof.
Background
Scarring is the natural sequelae of any wound that heals the wound by increasing the deposition and attachment of collagen fibers in the dermis. Certain body parts, including hands, back, shoulders, etc., are particularly susceptible to the development of abnormal scars, known as hypertrophic scars or keloids. Such skin lesions generally protrude from the skin surface, where dermal collagen fibers are heavily deposited. They have the same clinical manifestations: the skin lesions appeared red, convex, firm and smooth in surface. While hypertrophic scar tissue spontaneously flattens itself over one to several years, keloid scars often continue to grow and exceed the site of the original wound. Patients with hypertrophic scars or keloids may experience pain, itching and local sensitivity, and these discomfort may affect the quality of life and personal appearance of the patient.
Current treatments for hypertrophic scars or keloids remain challenging. Existing treatment methods include: topical application of silicone gel, compression therapy, topical corticosteroid hormone or interferon injection, surface cryotherapy, radiation therapy, laser therapy, and surgical resection. However, these treatments are not ideal and the recurrence rate after treatment is relatively high. The surface freezing treatment method directly sprays liquid nitrogen on the surface of hyperplastic scar or keloid skin, and a freezing probe or a cotton swab stained with liquid nitrogen can be directly pressed on an affected part. The disadvantages of this method of treatment are the lack of depth of treatment and the relatively shallow range of action, resulting in a relatively high recurrence rate of the treatment, the formation of ulcers which are prone to freezing on the surface of scar tissue, mild to moderate pain and redness and swelling of the patient during treatment, and the possibility of inflammation and pigmentation or loss after treatment.
Disclosure of Invention
The main purpose of the present invention is to propose a device for the treatment of cold in scars, aiming at solving at least one of the technical problems mentioned above.
In order to achieve the above object, the present invention provides an in-scar cryotherapy apparatus, comprising:
the device comprises a shell, a first fixing piece and a second fixing piece, wherein one end of the shell is provided with a through hole;
a driving member mounted to the housing; and the number of the first and second groups,
the needle tube assembly is arranged in the shell and is connected to the driving piece, and the driving piece is used for driving the tip end of the needle tube assembly to extend out of the shell or move back into the shell through the through hole; wherein the content of the first and second substances,
the needle tube assembly comprises an injection tube, the injection tube is provided with a liquid nitrogen input port and an exhaust port, the liquid nitrogen input port is used for being communicated with a liquid nitrogen source, the exhaust port is used for exhausting gas in the injection tube, and the tip of the injection tube is also provided with a liquid nitrogen injection port; alternatively, the first and second electrodes may be,
the needle tube assembly comprises an injection tube and an exhaust tube which are arranged side by side, the tip of the injection tube and the tip of the exhaust tube jointly form a needle point, the injection tube is provided with a liquid nitrogen input port which is used for being communicated with a liquid nitrogen source, and the tip of the injection tube is also provided with a liquid nitrogen injection port; the exhaust pipe is provided with a first vent hole which is used for being communicated with the negative pressure suction device, and the tip of the exhaust pipe is also provided with a second vent hole; alternatively, the first and second electrodes may be,
the needle tube assembly comprises a large needle tube and a small needle tube, the large needle tube is sleeved on the periphery of the small needle tube, a cavity is formed between the large needle tube and the small needle tube, the tip of the large needle tube and the tip of the small needle tube jointly form a needle point, one of the large needle tube and the small needle tube is an injection tube, the other one of the large needle tube and the small needle tube is an exhaust tube, the injection tube is provided with a liquid nitrogen input port communicated with a liquid nitrogen source, and the tip of the injection tube is also provided with a liquid nitrogen injection port; the exhaust pipe is provided with a first vent hole used for being communicated with the negative pressure suction device, and the tip of the exhaust pipe is also provided with a second vent hole.
In one embodiment, the liquid nitrogen input port is arranged at the other end of the injection tube different from the tip end of the injection tube, and the exhaust port is arranged on the side wall of the injection tube.
In one embodiment, the large needle tube is an exhaust tube, the small needle tube is an injection tube, the liquid nitrogen input port is arranged at the other end of the needle tube different from the tip of the needle tube, and the other end of the exhaust tube different from the tip of the exhaust tube.
In one embodiment, the outer peripheral surface of the needle cannula assembly is provided with a heat insulating layer.
In an embodiment, the housing is a cylindrical structure, one end of the housing close to the tip end of the needle tube assembly is arranged in a tapered manner, a positioning portion is formed at the end of the housing in the tapered manner, the positioning portion is a planar structure, and the through opening is opened in the positioning portion.
In an embodiment, a base plate is further installed in the housing, the base plate has a first plate surface and a second plate surface which are opposite to each other, the driving member is connected to the first plate surface, the needle tube assembly is connected to the second plate surface, and the driving member is used for driving the base plate to move along the axial direction of the housing.
In an embodiment, the device for treating cold in scars further comprises a displacement sensor, and the displacement sensor is mounted on the base plate.
In one embodiment, the other end of the needle tube assembly, which is different from the tip end of the needle tube assembly, is further provided with a connecting buckle, and the needle tube assembly is detachably connected with the base plate through the connecting buckle.
The invention also provides a control method of the in-scar freezing treatment device, which is applied to the in-scar freezing treatment device and comprises the following steps:
obtaining the preset value S of the depth of the needle tube assembly penetrating into the scar tissue0；
The driving piece is controlled to drive the needle tube component to move so as to prick scar tissue, and the moving distance is S2，S2＝S0+S1Wherein S is1The distance between the tip end of the needle tube component and the through opening;
acquiring a preset value Q of single liquid nitrogen injection quantity and a preset value N of injection times of the needle tube assembly;
and controlling the needle tube assembly to inject liquid nitrogen into the scar tissue, wherein the injection amount of single liquid nitrogen is Q, and the injection times are N.
Further, the step of controlling the needle cannula assembly to inject liquid nitrogen into the scar tissue may be preceded by the steps of:
the exhaust port or exhaust pipe of the control needle tube assembly is communicated with the negative pressure suction device.
According to the technical scheme, the tip of the needle tube assembly can be driven by the driving piece to be pricked into the scar tissue, and the liquid nitrogen is directly acted on the core of the scar tissue through the liquid nitrogen injection port, so that the treatment depth of the scar tissue is deepened, the treatment effect is improved, and the recurrence rate of the scar is reduced; meanwhile, the direct action on the surface of scar tissue is avoided in the treatment process, so that the epidermal tissue of the scar is protected, the risks of ulcer and inflammation of a patient during treatment are reduced, and the quick rehabilitation of the patient is facilitated. In general, the invention can realize accurate cryotherapy of scar tissues, prevent complications of traditional scar surface cryotherapy, improve the treatment comfort and reduce the recurrence rate of scar treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of the cryotherapeutic device for the treatment of internal scars in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a needle cannula assembly according to an embodiment of the present invention;
FIG. 3 is a schematic view of a needle cannula assembly according to another embodiment of the present invention;
FIG. 4 is a schematic view of a needle cannula assembly according to yet another embodiment of the present invention;
FIG. 5 is another schematic view of the syringe assembly of FIG. 1
Fig. 6 illustrates a method for controlling the device for the cold treatment of scars shown in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
110 | Positioning |
| 111 | Through |
200 | |
| 210 | |
220 | |
| 300 | |
310 | |
| 311 | Liquid |
312 | Liquid |
| 313 | |
320 | |
| 321 | |
322 | |
| 400 | Substrate | 500 | Connecting buckle |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The embodiment of the invention provides an internal scar freezing treatment device, and the internal scar freezing treatment device provided by the embodiment of the invention is specifically described with reference to fig. 1 to 4.
In one embodiment of the invention, the device for the treatment of cold in scars comprises:
a shell 100, wherein one end of the shell 100 is provided with a through hole 111;
a driving member 200 mounted to the housing 100; and the number of the first and second groups,
a needle tube assembly 300 installed in the housing 100 and connected to the driving member 200, wherein the driving member 200 is used for driving the tip of the needle tube assembly 300 to extend out of the housing 100 or move back into the housing 100 through the through hole 111; wherein the content of the first and second substances,
the needle tube assembly 300 comprises an injection tube 310, the injection tube 310 is provided with a liquid nitrogen input port 311 and an exhaust port 313, the liquid nitrogen input port 311 is used for being communicated with a liquid nitrogen source, the exhaust port 313 is used for being communicated with a negative pressure suction device, and the tip of the injection tube 310 is further provided with a liquid nitrogen injection port 312; alternatively, the first and second electrodes may be,
the needle tube assembly 300 comprises an injection tube 310 and an exhaust tube 320 which are arranged side by side, the tip of the injection tube 310 and the tip of the exhaust tube 320 form a needle point together, the injection tube 310 is provided with a liquid nitrogen input port 311 used for being communicated with a liquid nitrogen source, and the tip of the injection tube 310 is also provided with a liquid nitrogen injection port 312; the exhaust pipe 320 is provided with a first vent hole 321 for communicating with a negative pressure suction device, and the tip of the exhaust pipe 320 is also provided with a second vent hole 322; alternatively, the first and second electrodes may be,
the needle tube assembly 300 comprises a large needle tube and a small needle tube, the large needle tube is sleeved on the periphery of the small needle tube, a cavity is formed between the large needle tube and the small needle tube, the tip of the large needle tube and the tip of the small needle tube jointly form a needle point, one of the large needle tube and the small needle tube is an injection tube 310, the other one of the large needle tube and the small needle tube is an exhaust tube 320, the injection tube 310 is provided with a liquid nitrogen input port 311 used for being communicated with a liquid nitrogen source, and the tip of the injection tube 310 is also provided with a liquid nitrogen injection port 312; the exhaust pipe 320 is provided with a first vent hole 321 for communicating with a negative pressure suction device, and a second vent hole 322 is further provided at a tip of the exhaust pipe 320.
In the prior art, methods for treating scar tissue (including hypertrophic scars or keloids) include: topical application of silicone gel, compression therapy, topical corticosteroid hormone or interferon injection, surface cryotherapy, radiation therapy, laser therapy, and surgical resection. However, these treatments are not ideal and have a high recurrence rate after treatment. The surface freezing treatment method directly sprays liquid nitrogen on the surface of hyperplastic scar or keloid skin, and a freezing probe or a cotton swab stained with liquid nitrogen can be directly pressed on an affected part. The disadvantages of this method of treatment are the lack of depth of treatment and the relatively shallow range of action, resulting in a relatively high recurrence rate of the treatment, the formation of ulcers which are prone to freezing on the surface of scar tissue, mild to moderate pain and redness and swelling of the patient during treatment, and the possibility of inflammation and pigmentation or loss after treatment.
According to the technical scheme, the driving piece 200 drives the tip of the needle tube assembly 300 to extend out of the shell 100, so that the tip of the needle tube assembly 300 is inserted into scar tissue, liquid nitrogen is injected into the scar tissue (including hypertrophic scars or keloids) through the needle tube assembly 300, an operator can adjust the insertion depth of the needle tube assembly 300 according to experience values, the liquid nitrogen directly acts on a core part in the scar tissue, and blood vessels and cells in the scar tissue are subjected to a series of pathological changes such as ischemia, hypoxia and necrosis under the freezing action of the liquid nitrogen, so that the purpose of damaging the scar tissue is achieved, and the scar tissue can be remarkably reduced or eliminated.
Specifically, as shown in FIG. 2, needle cannula assembly 300 may include only syringe 310, with the tip of syringe 310 being provided with liquid nitrogen injection port 312 to inject liquid nitrogen into the scar tissue after the tip of syringe 310 penetrates the scar tissue. Syringe 310 is further provided with an exhaust port 313, and exhaust port 313 is used for exhausting the gas in syringe 310. The air outlet 313 may be in communication with a negative pressure aspiration device so that air at the needle tip can be rapidly evacuated by opening the negative pressure aspiration device prior to injecting the liquid nitrogen, so that the liquid nitrogen can smoothly pass through the liquid nitrogen injection port 312 and be injected into the scar tissue. As shown in FIGS. 3 and 4, when the syringe assembly 300 further includes an injection tube 310 and an exhaust tube 320, the exhaust tube 320 is used to communicate with the vacuum suction device, and the exhaust tube 320 and the injection tube 310 extend in the same direction and have the same tip orientation. It will be appreciated that the exhaust tube 320 and the tip of the injection tube 310 will be inserted into the scar tissue, and the air at the needle tip can be quickly evacuated when the exhaust tube 320 is evacuated by the vacuum suction device. It should be noted that, during the process of injecting liquid nitrogen, the liquid nitrogen in the syringe assembly 300 is partially vaporized into nitrogen gas, and the exhaust port 313 or the exhaust pipe 320 can also be used to exhaust the nitrogen gas in the syringe assembly 300, so as to effectively reduce the air pressure in the syringe assembly 300, thereby enabling the liquid nitrogen to smoothly enter the injection pipe 310.
Wherein, if the needle tube assembly 300 is composed of both the injection tube 310 and the exhaust tube 320, as shown in fig. 3, the injection tube 310 and the exhaust tube 320 can be arranged side by side, so that the tip of the injection tube 310 and the tip of the exhaust tube 320 form a needle point together, when the tips of the two prick into scar tissue together, the liquid nitrogen injection port 312 is communicated with the second vent port 322, therefore, the air and nitrogen in the injection tube 310 will be discharged through the second vent port 322 and the first vent port 321 in sequence;
as shown in FIG. 4, the needle cannula assembly 300 may also be of a cannula configuration, i.e., a large needle cannula is sleeved over a small needle cannula. Specifically, the two needle tubes may share the same axial line, or may have different axial lines, and in addition, the tube walls of the two needle tubes may not be connected, or may be bonded on the same side, as long as a chamber is formed between the two needle tubes to allow liquid nitrogen or gas to pass through. In this embodiment, one of the large needle tube and the small needle tube is the injection tube 310, and the other is the exhaust tube 320, that is, the exhaust tube 320 is sleeved on the periphery of the injection tube 310, or the injection tube 310 is sleeved on the periphery of the exhaust tube 320. When the tip of needle tube assembly 300 is inserted into scar tissue, the liquid nitrogen injection port 312 of injection tube 310 and the second vent port 322 of vent tube 320 are naturally communicated, so that air and nitrogen in injection tube 310 are discharged through second vent port 322 and first vent port 321 in sequence.
According to the technical scheme, the tip of the needle tube assembly 300 can be driven by the driving piece 200 to be pricked into scar tissue, and liquid nitrogen is directly acted on the core of the scar tissue through the liquid nitrogen injection port 312, so that the treatment depth of the scar tissue is deepened, the treatment effect is improved, and the recurrence rate of the scar is reduced; meanwhile, the direct action on the surface of scar tissue is avoided in the treatment process, so that the epidermal tissue of the scar is protected, the risks of ulcer and inflammation of a patient during treatment are reduced, and the quick rehabilitation of the patient is facilitated. In general, the invention can realize accurate cryotherapy of scar tissues, prevent complications of traditional scar surface cryotherapy, improve the treatment comfort and reduce the recurrence rate of scar treatment.
In one embodiment, as shown in FIG. 2, when the syringe assembly 300 is a single tube, the liquid nitrogen injection port 312 is disposed at the tip of the syringe 310, the liquid nitrogen input port 311 is disposed at the other end of the syringe 310 different from the tip thereof, and the exhaust port 313 is disposed on the sidewall of the syringe 310. Specifically, the liquid nitrogen inlet 311 and the liquid nitrogen source (liquid nitrogen device) may be connected by a conduit, and the conduit is made of stainless steel (the surface is covered with a heat insulating material) or a vacuum tube. Before injecting liquid nitrogen, the air outlet 313 is communicated with a negative pressure suction device to empty air in the injection tube 310 in advance; the gas outlet 313 is closed when injecting liquid nitrogen, and the gas outlet 313 is opened after the injection is finished. According to the technical scheme of the embodiment, the liquid nitrogen input port 311 is arranged at the end part of the injection tube 310, and the exhaust port 313 is arranged on the side wall of the injection tube 310, so that interference between the liquid nitrogen input port 311 and the exhaust port 313 can be effectively avoided, and the needle tube assembly 300 can be ensured to be capable of smoothly injecting liquid nitrogen. The needle tube assembly 300 of the embodiment is of a single-tube structure, simple and reliable in structure, low in manufacturing process difficulty and beneficial to improving the production efficiency.
In another embodiment, as shown in fig. 4, the large needle tube is an exhaust tube 320, the small needle tube is an injection tube 310, that is, the exhaust tube 320 is sleeved on the periphery of the injection tube 310, the liquid nitrogen injection port 312 is arranged at the tip of the injection tube 310, and the liquid nitrogen input port 311 is arranged at the other end of the injection tube 310 different from the tip thereof; the second vent hole 322 is provided at the tip end of the exhaust pipe 320, and the first vent hole 321 is provided at the other end of the exhaust pipe 320 different from the tip end thereof. Of course, in other embodiments, the first vent 321 may also be disposed on a sidewall of a chamber formed between the exhaust tube 310 and the injection tube 320.
Further, the outer circumferential surface of the needle tube assembly 300 is provided with a heat insulating layer (not shown in the drawings) to prevent the outer circumferential wall of the needle tube assembly 300 from being excessively cold when injecting liquid nitrogen. Specifically, the entire outer surface of the needle tube assembly 300 may be covered with a heat insulating layer, or the outer surface of the needle tube assembly 300 other than the needle tip may be covered with a heat insulating layer. Wherein the thermal insulation layer is made of thermal insulation material which retards heat flow transmission, and the thermal insulation material includes but is not limited to glass fiber, asbestos, rock wool, silicate, foamed plastic and the like. The technical scheme of the embodiment sets up the heat insulation layer through the peripheral face at needle tubing subassembly 300, can avoid the epidermis tissue of frostbite scar when treating to the condition of ulcer and inflammation appears in the patient during effective avoidance treatment.
Further, as shown in fig. 1, the housing 100 is a cylindrical structure, one end of the housing 100 close to the tip of the needle tube assembly 300 is tapered, a positioning portion 110 is formed at the tapered end of the housing 100, the positioning portion 110 is a planar structure, and the through hole 111 is opened in the positioning portion 110. So set up, can be in scar treatment process, be convenient for the user to scar tissue carry out quick, accurate location to make needle tubing subassembly 300 can accurately prick scar tissue's core department.
Still install base plate 400 in the casing 100, base plate 400 has relative first face and the second face that sets up, and driving piece 200 connect in first face, needle tubing assembly 300 connects in the second face, and driving piece 200 is used for driving base plate 400 along the axial displacement of casing 100. The driving member 200 includes a motor 210 and a driving rod 220, the motor 210 is connected to the driving rod 220, and the driving rod 220 is connected to the substrate 400. It will be appreciated that when the base 400 is driven by the driving member 200 toward the opening 111, the needle assembly 300 will move, such that the tip of the needle assembly 300 extends out of the housing 100 through the opening 111 and finally penetrates into the scar tissue. In this embodiment, since the substrate 400 can move along the axial direction of the housing 100, the substrate 400 drives the needle tube assembly 300 to move, which is beneficial for the needle tube assembly 300 to stably move in the same direction, and can avoid the situation that the needle tube assembly 300 is easily broken due to the direct connection between the needle tube assembly 300 and the driving member 200.
Further, the device for treating the cold in the scar further comprises a displacement sensor (not shown in the figure), and the displacement sensor is mounted on the substrate 400. The displacement sensor is used for detecting the displacement of the substrate 400, which is equivalent to detecting the moving distance of the needle tube assembly 300, so the displacement sensor can be used for feeding back the depth of the needle tube assembly 300 inserted into the scar tissue.
Further, as shown in fig. 5, the other end of the needle tube assembly 300, which is different from the tip end thereof, is further provided with a connecting buckle 500, and the needle tube assembly 300 is detachably connected with the base plate 400 through the connecting buckle 500. It will be appreciated that the needle cannula assembly 300 may be removably mounted to the base plate 400 to facilitate replacement of the needle cannula assembly 300 by a user to avoid cross-contamination of the patient.
In one embodiment, the other end of the needle tube assembly 300, different from the tip end thereof, is fixedly mounted in the base plate 400, and the base plate 400 is provided with two through holes, wherein one through hole is used as a liquid nitrogen inlet and is used for communicating with the liquid nitrogen input port 311 of the injection tube 310; the other through hole is used as a nitrogen outlet for communicating with the first vent 321 of the exhaust pipe 320.
The embodiment of the present invention further provides a control method of an internal scar freezing treatment device, which is applied to the aforementioned internal scar freezing treatment device, and as shown in fig. 6, the control method includes the following steps:
s101, obtaining a preset value S of the depth of the needle tube assembly 300 penetrating into scar tissue0；
S102, controlling the driving member 200 to drive the needle tube assembly 300 to move for pricking scar tissue, wherein the moving distance is S2，S2＝S0+S1Wherein S is1The distance between the tip of the needle assembly 300 and the port 111;
s103, acquiring a preset value Q of single liquid nitrogen injection quantity and a preset value N of injection times of the needle tube assembly 300;
s104, controlling the needle tube assembly 300 to inject liquid nitrogen into the scar tissue, wherein the injection amount of single liquid nitrogen is Q, and the injection times are N.
Specifically, the in-scar freezing device further comprises a controller and an interactive module, and a user can set a preset value S for the penetration depth of the needle tube assembly 300 into scar tissue through the interactive module0The controller then obtains a preset value S for the depth of penetration of needle cannula assembly 300 into scar tissue0Then, the preset value S of the total moving distance of the needle tube assembly 300 is calculated2The preset value S2Equal to the distance S between the tip of the needle assembly 300 and the opening 1111And a preset value S of the depth of penetration of the needle cannula assembly 300 into scar tissue2And (4) summing. Wherein the distance S between the tip of the needle tube assembly 300 and the through opening 1111Which is the distance between the needle tip and the surface of the scar tissue when the positioning part 110 of the therapeutic device is tightly attached to the surface of the tissue. Of course, if the tip of the needle cannula assembly 300 is just flush with the positioning portion 110, the preset value S of the moving distance of the needle cannula assembly 300 is set2Equal to the preset value S of the depth of the needle tube assembly 300 penetrating into the scar tissue0。
In addition, the user can also set a preset value Q of the single liquid nitrogen injection amount and a preset value N of the injection times of the needle tube assembly 300 through the interaction module, after the internal scar freezing treatment device is started, the controller can obtain the preset value Q and the preset value N, and then the needle tube assembly 300 is controlled to inject liquid nitrogen into scar tissue, wherein the single liquid nitrogen injection amount is Q, and the injection times are N.
Further, the step of controlling needle cannula assembly 300 to inject liquid nitrogen into scar tissue may be preceded by the steps of:
the exhaust port 313 or exhaust tubing 320 of the control needle assembly 300 is in communication with the negative pressure aspiration device.
It will be appreciated that the evacuation of air and nitrogen from syringe 310 is facilitated by controlling either vent 313 or vent 320 of needle cannula assembly 300 to communicate with a negative pressure aspiration device to reduce the air pressure in needle cannula assembly 300 to facilitate the smooth injection of liquid nitrogen into the core of scar tissue. Wherein, the user can also set the time T and frequency F at which the syringe assembly 300 communicates with the negative pressure aspiration device via the interaction module to control the time and frequency at which the syringe assembly 300 injects liquid nitrogen. It should be noted that the preset values S, Q, N, T, F, etc. can be set according to the experience value obtained by the user.
In this embodiment, the specific operation method of the device for treating cold in scars is as follows:
(1) the user holds the cold therapy device in the scar to make the positioning part 110 tightly attached to the epidermis of the scar tissue and make the through hole 111 aligned to the core position of the scar tissue;
(2) setting the penetration depth of the needle tube assembly 300, starting the in-scar freezing treatment device, and driving the needle tube assembly 300 to penetrate into the designated position of the scar tissue through the motor 210;
(3) setting the single liquid nitrogen injection amount and the injection frequency, and starting a negative pressure device for assistance according to needs while injecting the liquid nitrogen so that the liquid nitrogen can be smoothly injected to the core of the scar tissue;
(4) the liquid nitrogen injection function of the device for the intraluminal freeze treatment of scars is stopped, and needle cannula assembly 300 is driven by motor 210 to withdraw from the scar tissue and move back into housing 100.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An in-scar cryotherapy device, comprising:
the device comprises a shell, a first fixing piece and a second fixing piece, wherein one end of the shell is provided with a through hole;
a driving member mounted to the housing; and the number of the first and second groups,
the needle tube assembly is arranged in the shell and is connected to the driving piece, and the driving piece is used for driving the tip end of the needle tube assembly to extend out of the shell or move back into the shell through the through hole; wherein the content of the first and second substances,
the needle tube assembly comprises an injection tube, the injection tube is provided with a liquid nitrogen input port and an exhaust port, the liquid nitrogen input port is used for being communicated with a liquid nitrogen source, the exhaust port is used for exhausting gas in the injection tube, and the tip of the injection tube is also provided with a liquid nitrogen injection port; alternatively, the first and second electrodes may be,
the needle tube assembly comprises an injection tube and an exhaust tube which are arranged side by side, the tip of the injection tube and the tip of the exhaust tube jointly form a needle point, the injection tube is provided with a liquid nitrogen input port which is used for being communicated with a liquid nitrogen source, and the tip of the injection tube is also provided with a liquid nitrogen injection port; the exhaust pipe is provided with a first vent hole which is used for being communicated with the negative pressure suction device, and the tip of the exhaust pipe is also provided with a second vent hole; alternatively, the first and second electrodes may be,
the needle tube assembly comprises a large needle tube and a small needle tube, the large needle tube is sleeved on the periphery of the small needle tube, a cavity is formed between the large needle tube and the small needle tube, the tip of the large needle tube and the tip of the small needle tube jointly form a needle point, one of the large needle tube and the small needle tube is an injection tube, the other one of the large needle tube and the small needle tube is an exhaust tube, the injection tube is provided with a liquid nitrogen input port communicated with a liquid nitrogen source, and the tip of the injection tube is also provided with a liquid nitrogen injection port; the exhaust pipe is provided with a first vent hole which is used for being communicated with the negative pressure suction device, and the tip of the exhaust pipe is also provided with a second vent hole;
the peripheral face of needle tubing subassembly is provided with the heat insulation layer.
2. The intralhestra cryotherapeutic device of claim 1, wherein said liquid nitrogen inlet is located at the other end of said syringe from the tip thereof, and said air vent is located in the side wall of said syringe.
3. The intrascar cryotherapy apparatus according to claim 1, wherein said large needle tube is an exhaust tube, said small needle tube is an injection tube, said liquid nitrogen input port is provided at the other end of said needle tube different from the tip thereof, and said first air vent is provided at the other end of said exhaust tube different from the tip thereof.
4. The intrascar cryotherapy device according to claim 1, wherein the housing is a cylindrical structure, and one end of the housing near the tip of the needle tube assembly is tapered, and a positioning portion is formed at the tapered end of the housing, the positioning portion is a planar structure, and the through opening is opened at the positioning portion.
5. The device of claim 4, further comprising a base plate disposed within the housing, the base plate having a first plate surface and a second plate surface opposite to the first plate surface, wherein the driving member is connected to the first plate surface, the needle assembly is connected to the second plate surface, and the driving member is configured to drive the base plate to move axially along the housing.
6. The intraluminal cryotherapeutic device of claim 5, further comprising a displacement sensor mounted to the base plate.
7. The intraluminal cryosurgical device of claim 6, wherein a connector link is further disposed at the other end of the needle cannula assembly different from the tip end thereof, and the needle cannula assembly and the base plate are detachably connected through the connector link.
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| CN202010347700.3A CN111437029B (en) | 2020-04-27 | 2020-04-27 | Cold-freezing therapeutic device in scar and control method thereof |
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Address after: 518000 3rd floor, block a, building F2, Changfeng Industrial Park, Liuxian 3rd road, 68 Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Peninsula Medical Group Co.,Ltd. Address before: 518000 3rd floor, block a, building F2, Changfeng Industrial Park, Liuxian 3rd road, 68 Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Peninsula Medical Co.,Ltd. |