CN110870783A - Split assembly and surgical accessory - Google Patents
Split assembly and surgical accessory Download PDFInfo
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- CN110870783A CN110870783A CN201911242179.0A CN201911242179A CN110870783A CN 110870783 A CN110870783 A CN 110870783A CN 201911242179 A CN201911242179 A CN 201911242179A CN 110870783 A CN110870783 A CN 110870783A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
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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
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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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
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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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
- A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
- A61B2018/00023—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids closed, i.e. without wound contact by the fluid
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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
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00059—Material properties
- A61B2018/00071—Electrical conductivity
- A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
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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
- A61B2018/00529—Liver
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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
- A61B2018/00541—Lung or bronchi
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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
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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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
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1425—Needle
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Abstract
The invention provides a split component which comprises a needle seat, an outer sleeve part, a needle tube, a conductive part and a liquid guide part. The needle seat is detachably and fixedly connected with the outer sleeve part, so that the needle tube can be inserted into a target tissue to be positioned by holding the outer sleeve part firstly during puncture, unnecessary damage to a human body or the target tissue caused by excessive weight of other subsequently installed devices connected with the split component is avoided, and the use safety is improved; the tail end of the needle tube is provided with a blunt sealing structure, so that blood vessels in target tissues can be effectively prevented from being punctured in the process of puncturing the target tissues, bleeding is prevented, samples in the subsequent biopsy process are prevented from being polluted, the use safety is further improved, and the accuracy of the biopsy structure is favorably ensured. The invention also provides a surgical accessory provided with the split component.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a split component and a surgical accessory.
Background
The diagnosis or treatment of target tissues such as tumor by using high-frequency energy, for example, radio frequency energy can effectively kill cancer cells without causing side effects, and thus, the method becomes an effective treatment means for solid tumors such as liver and lung.
The chinese patent application with publication number CN109350234A discloses an ablation needle assembly, wherein an outer sleeve is movably sleeved outside an electrode needle main body of an ablation needle and is detachably and fixedly connected with an ablation handle, after the ablation operation is completed, the outer sleeve is left in the body to provide a channel for other operations, and unnecessary damage to tissues caused by repeated puncture is avoided. However, before the ablation operation, the puncture needle core must be pulled out, and then the ablation needle is placed into the outer sleeve, on one hand, the puncture needle core is a pointed end, when the ablation needle assembly is applied to puncture lung tumor, the puncture needle core is easy to puncture lung tumor tissue or internal blood vessels, bleeding is caused or potential tumor cells are adjacent to alveoli to scatter, and the pulling-out of the puncture needle core further destroys the closed environment between the outer sleeve and the tissue to be ablated, so that blood is ejected from the outer sleeve, the use safety is not high, and the sample is easy to be polluted in the subsequent biopsy sampling process, thereby affecting the accuracy of the biopsy result.
Therefore, there is a need to develop a new split assembly to avoid the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a split component and a surgical accessory for assisting tissue biopsy, which avoid the problem that a biopsy sample is easy to be polluted due to bleeding, ensure the accuracy of a biopsy result and improve the use safety.
In order to achieve the purpose, the split assembly acts on target tissues in a human body to assist in tissue biopsy, and comprises a needle seat, an outer sleeve part, a needle tube, a conductive part and a liquid guide part; the needle seat is detachably and fixedly connected with the outer sleeve part; the needle tube is fixedly connected with the outer sleeve part, one part of the needle tube is accommodated in the outer sleeve part, the other part of the needle tube penetrates out of the outer sleeve part, and the tail end of the needle tube is provided with a blunt head sealing structure; the conductive part is fixedly connected with the needle tube accommodated in the outer sleeve part so as to transmit energy to the tail end of the needle tube and enable the interior of the conductive part to be communicated with the interior of the needle tube so as to form a liquid guide channel; the liquid guide part is contained in the liquid guide channel so as to form a liquid inlet passage and a backflow passage in the liquid guide channel.
The split component has the beneficial effects that: the needle seat is detachably and fixedly connected with the outer sleeve part, so that the needle tube can be inserted into the target tissue to be positioned by holding the outer sleeve part firstly during puncture, unnecessary damage to a human body or the target tissue caused by overlarge weight of other subsequently installed devices connected with the split component is avoided, and the use safety is improved; the tail end of the needle tube is provided with a blunt sealing structure, so that blood vessels in target tissues can be effectively prevented from being punctured in the process of puncturing the target tissues, bleeding is prevented, samples in the subsequent biopsy process are prevented from being polluted, the use safety is further improved, and the accuracy of the biopsy structure is favorably ensured.
Preferably, the total weight of the needle tube and the outer sleeve part is not more than 20 g, the wall thickness of the needle tube is not more than 0.5 mm, the density of the constituent material of the needle tube is not more than 8.5 g/cc, and the density of the constituent material of the outer sleeve part is not more than 1.5 g/cc. The beneficial effects are that: the self weight of the split component is reduced, and unnecessary damage to target tissues in the subsequent operation process is further avoided.
Further preferably, the needle tube is made of a conductive material, the part of the needle tube, which penetrates out of the outer sleeve part, is an insulating section and a working section which are mutually connected, the outer surface of the insulating section is provided with an insulating coating, and the tail end of the working section is provided with the blunt sealing structure. The beneficial effects are that: the needle tube is made of conductive material, energy can be transferred to the target tissue in the subsequent application process, and the insulating coating on the outer surface of the insulating section is beneficial to preventing unnecessary damage to an operator caused by the exposed insulating section in the subsequent operation process.
Further preferably, the needle tube is composed of a non-conductive material, the density of the non-conductive material is not more than 2 g/cc, the wall thickness of the needle tube is not more than 0.3 mm, and the outer surface of the needle tube is provided with a conductive coating. The beneficial effects are that: the self-weight of the split component is reduced, and meanwhile, energy can be effectively transferred to the target tissue in the subsequent application process.
Still further preferably, the portion of the needle tube extending out of the outer sleeve portion has a working section, the working section terminates in the blunt sealing structure, and the inner side wall of the working section has the conductive coating. The beneficial effects are that: advantageously further enhancing the intensity of the energy delivered to the target tissue.
Still further preferably, the needle tube further has a conductive lead, one end of the conductive lead is fixedly connected with the outer side wall of the working section, and the other end of the conductive lead penetrates through the outer sleeve portion to be electrically connected with the conductive portion. The beneficial effects are that: advantageously further enhancing the intensity of the energy delivered to the target tissue.
Preferably, part of the inner side wall of the conductive portion is closely attached to part of the outer side wall of the needle tube accommodated in the outer sleeve portion, so that the interior of the conductive portion is communicated with the interior of the needle tube. The beneficial effects are that: and good sealing performance is ensured, so that the electric connection between the conductive part and the needle tube is realized, and meanwhile, the circulating cooling medium entering the liquid guide channel in the subsequent use process is facilitated not to leak.
Further preferably, at least part of the inner side wall of the conductive part and at least part of the outer side wall of the needle tube accommodated in the outer sleeve part are provided with taper degrees, and the taper degrees are 3-6 degrees, so that the conductive part and the needle tube are fixedly connected in a taper self-locking mode.
Preferably, the liquid inlet passage is formed in the liquid guide portion, and the backflow passage is formed between the outer surface of the liquid guide portion and the inner surface of the conductive portion. The beneficial effects are that: the water cooling structure is simplified, the temperature of the working section is controlled, unnecessary damage to a human body is avoided, and the use safety is further improved.
Preferably, the backflow passage is formed in the liquid guide portion, and the liquid inlet passage is formed between the outer surface of the liquid guide portion and the inner surface of the conductive portion. The beneficial effects are that: the water cooling structure is simplified, the temperature of the working section is controlled, unnecessary damage to a human body is avoided, and the use safety is further improved.
Preferably, the needle seat and the outer sleeve part are in threaded engagement to realize the detachable fixed connection. The beneficial effects are that: the outer sleeve part is beneficial to inserting the working section into a human body for positioning when positioning and puncturing, and unnecessary damage to the human body or target tissues caused by overlarge weight of other devices connected with the split component and mounted subsequently is avoided.
Further preferably, the needle seat is provided with a joint seat, the inner side wall of the joint seat is provided with an internal thread structure, one end of the outer sleeve part is provided with a locking part, and the locking part is screwed along the internal thread to realize the detachable fixed connection.
Further preferably, the bottom of the joint seat is further provided with a joint, and at least part of the outer side wall of the joint is tightly attached to part of the inner side wall of the outer sleeve portion.
It is further preferred that at least part of the outer diameter of the joint is adapted to part of the inner diameter of the outer sleeve portion.
Further preferably, at least part of the outer side wall of the joint and at least part of the inner side wall of the outer sleeve portion are provided with tapers, and the tapers are 3 degrees to 6 degrees, so that the joint and the outer sleeve portion can be tightly attached in a taper self-locking mode.
The surgical accessory comprises a handle and the split component, wherein one end of the handle is fixedly connected with a needle seat of the split component, the other end of the handle is provided with a liquid inlet part, a liquid outlet part and an energy transmission part, the liquid inlet part and the liquid outlet part are used for introducing or discharging a circulating cooling medium into or out of a liquid introducing channel of the split component, and the energy transmission part is used for providing energy to a needle tube of the split component through a conductive part of the split component.
The surgical accessory has the advantages that: the surgical accessory is provided with the split component, and in the split component, the needle seat is detachably and fixedly connected with the outer sleeve part, so that the outer sleeve part can be held firstly to insert the working section into the target tissue for positioning during puncture, unnecessary damage to a human body or the target tissue caused by overlarge weight of other subsequently installed devices connected with the split component is avoided, and the use safety is improved; the tail end of the needle tube working section is provided with a blunt sealing structure, so that blood vessels in target tissues can be effectively prevented from being punctured in the process of puncturing the target tissues, bleeding is prevented, samples in the subsequent biopsy process are prevented from being polluted, the use safety is further improved, and the accuracy of a biopsy structure is favorably ensured.
Drawings
Fig. 1 is a schematic structural view of a split assembly according to embodiment 1 of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the first hub shown in FIG. 1;
FIG. 3 is a left side view of the first locking portion shown in FIG. 1;
FIG. 4 is a schematic view of the assembled structure of the needle cannula and the outer sleeve portion shown in FIG. 1;
FIG. 5 is a schematic view illustrating an assembly structure of the needle cannula, the first water guiding tube and the first conducting tube shown in FIG. 1;
FIG. 6a is a schematic view of an operation state of the portion A shown in FIG. 5;
FIG. 6b is a schematic view of the portion A shown in FIG. 5 in another operation state;
fig. 7 is a schematic structural view of an ablation handle of embodiment 2 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
In view of the problems of the prior art, embodiments of the present invention provide a split component acting on a target tissue in a human body, which is used to assist in performing tissue biopsy.
In this embodiment, the split assembly includes a needle holder, an outer sleeve portion, a needle tube, a conductive portion, and a fluid conducting portion. The needle seat is detachably and fixedly connected with the outer sleeve part; the needle tube is fixedly connected with the outer sleeve part and is provided with an accommodating section, an insulating section and a working section which are connected with each other, the accommodating section is accommodated in the outer sleeve part, and the tail end of the working section is provided with a blunt sealing structure; the conductive part is electrically connected with the needle tube, and the inside of the conductive part is communicated with the inside of the needle tube to form a liquid guide channel; the liquid guide part is contained in the liquid guide channel so as to form a liquid inlet passage and a backflow passage in the liquid guide channel.
In some embodiments of the invention, the target tissue is Ground Glass Option (GGO).
The embodiment of the invention also provides a surgical accessory, which comprises a handle and the split component, wherein one end of the handle is fixedly connected with the needle seat of the split component, the other end of the handle is provided with a liquid inlet part, a liquid outlet part and an energy transmission part, the liquid inlet part and the liquid outlet part are used for introducing or discharging a circulating cooling medium into or out of a liquid guide channel of the split component, and the energy transmission part is used for providing radio frequency energy to a needle tube of the split component through a conductive part of the split component.
In some embodiments of the present invention, the circulating cooling medium is cooling water or high-pressure cold liquid, and the high-pressure cold liquid is high-pressure liquid nitrogen.
In some embodiments of the present invention, the outer sleeve portion is an outer sleeve, and a gripping portion is further disposed on an outer side wall of the outer sleeve.
In some embodiments of the invention, the needle cannula and the outer sleeve portion have a combined weight of no more than 20 grams, the needle cannula has a wall thickness of no more than 0.5 mm, the needle cannula comprises a material having a density of no more than 8.5 grams per cubic centimeter, and the outer sleeve portion comprises a material having a density of no more than 1.5 grams per cubic centimeter.
In some specific embodiments of the invention, the total weight of the needle tube and the outer sleeve is 10g, the wall thickness of the needle tube is 0.3 mm, the needle tube is made of a conductive material, the conductive material is 316 stainless steel with a density of 8.03 g/cc, and the outer sleeve is made of polypropylene with a density of 0.92 g/cc. In other specific embodiments of the invention, the material of the jacket portion is high density polyethylene having a density of 0.95 g/cc.
In some specific embodiments of the present invention, when the needle tube is made of a conductive material, the total weight of the needle tube and the outer sleeve is 5g or 15g, and the thickness of the needle tube is any one of 0.1mm, 0.2mm and 0.4 mm.
In some specific embodiments of the present invention, the medical alloy is any one of medical nickel-titanium alloy or medical titanium alloy with a density of 4.5 g/cc. In some embodiments of the present invention, the medical titanium alloy is manufactured under the designation TC 4.
In some embodiments of the invention, the needle cannula is comprised of a non-conductive material having a density of no more than 2 grams per cubic centimeter, the needle cannula has a wall thickness of no more than 0.3 millimeters, and the outer surface of the needle cannula has a conductive coating. In some embodiments of the invention, the wall thickness of the needle cannula is 0.1mm or 0.2 mm.
In some specific embodiments of the invention, the non-conductive material is polyimide having a density of 1.43 g/cc or polyetheretherketone having a density of 1.26-1.32 g/cc.
The technical solution of the present invention is described in detail below by way of examples 1 and 2.
Example 1
The embodiment provides a split assembly which is applied to perform radiofrequency ablation after puncture on the target tissue so as to act on the target tissue and assist in tissue biopsy.
Fig. 1 is a schematic structural view of a split assembly according to embodiment 1 of the present invention. Fig. 2 is a longitudinal cross-sectional view of the first needle mount shown in fig. 1. Fig. 3 is a left side view of the first locking portion shown in fig. 1.
Referring to fig. 1 and 2, the separate body assembly 1 has a first needle holder 11, a first needle 12, a first conductive tube 13, and a first water introduction tube 14. The first hub 11 has a fixed tube 111, a first adapter 112 and a first adapter 113. The first needle body 12 has an outer sleeve 121, a holding portion 122 and a needle tube 123, and the needle tube 123 is a radio frequency needle. One end of the outer sleeve 121 is provided with a first locking portion 1211. The working end of the needle tube 123 is the end far away from the first needle seat 11, and the needle tube is provided with a blunt sealing structure, so that the split component 1 is favorably applied to the subsequent process of puncturing the target tissue, particularly, bleeding is prevented when the target tissue is lung tumor, the sample in the subsequent biopsy process is prevented from being polluted, the use safety is further improved, and the accuracy of the biopsy structure is favorably ensured.
Referring to fig. 1, the holding portion 122 is a hollow trapezoid frame body, and the outer sleeve 121 penetrates through the holding portion 122 and is relatively fixed, so that a user can better control the first needle body 12 during using the split component 1, thereby improving positioning accuracy and avoiding unnecessary damage to a target tissue due to excessive weight of other devices connected to the split component 1 during subsequent installation.
In some embodiments of the present invention, the outer surface of the holding portion 122 has a plurality of protrusions to increase the friction on the surface of the holding portion 122, so that the user can better control the first needle 12.
In this embodiment, the first water guiding pipe 14 is made of plastic. In some embodiments of the present invention, the material of the first water guiding conduit 14 is metal, so as to further enhance the intensity of the transmission of the radio frequency energy to the working end of the needle tube 123, thereby facilitating to obtain a good ablation effect.
Referring to fig. 1 and 2, the fixing tube 111 is a hollow cylindrical tube, one end of which is fixed at the bottom of the first connector base 112, and the other end of which is used for fixedly connecting with an ablation handle (not shown). The first joint base 112 is a hollow cylinder with an opening at one end, and the inner side wall is provided with an internal thread 1121 for realizing a detachable fixed connection with the first locking portion 1211 in a threaded manner.
Referring to fig. 1, 2 and 3, the first locking structure 1211 has a first tab 12111 and a second tab 12112 that are mirror images of each other. After the first needle holder 11 and the outer sleeve portion 121 are held by hand, the first locking structure 1211 is abutted with the first joint seat 112, and the first needle holder 11 is rotated, the first protrusion pieces 12111 and the second protrusion pieces 12112 enter the interior of the first joint seat 112 along the internal thread 1121, so as to realize the detachable and fixed connection between the first needle holder 11 and the outer sleeve portion 121.
In some embodiments of the present invention, the outer surface of the first locking structure 1211 has an external thread, and the external thread is used for being detachably and fixedly connected with the internal thread 1121 in a screwing manner.
In some embodiments of the present invention, the needle tube 123 is coaxially disposed with the outer sleeve 121, which facilitates accurate positioning.
Referring to fig. 1 and 2, the outer sleeve 121 has a first inner diameter, which is adapted to an outer diameter of the first joint 113, such that an outer sidewall of the first joint 113 is closely attached to a portion of an inner sidewall of the outer sleeve 121, thereby achieving a good sealing performance while achieving a detachable and fixed connection.
In some embodiments of the present invention, an outer sidewall of the first joint 113 and a portion of an inner sidewall of the outer sleeve 121 both have a first taper, so that the first joint 113 and the outer sleeve 121 are tightly attached in a taper self-locking manner. The first taper is 3-6 degrees.
FIG. 4 is a schematic view of the needle cannula and the outer sleeve of FIG. 1. Referring to fig. 1 and 4, the outer casing portion 121 has a hollow structure. The outer sleeve 121 is sleeved outside the needle tube 123. Specifically, the open end of the needle tube 123 is located inside the outer sleeve 121, and a part of the open end is received inside the outer sleeve 121, and another part of the open end penetrates through the outer sleeve 121 in the radial direction of the outer sleeve 121 to extend to the outside of the outer sleeve 121. The inner diameter of the outer sleeve 121 decreases in the extending direction of the sealing end, so that a part of the outer surface of the needle tube 123 is attached to a part of the inner side wall of the outer sleeve 121, and the needle tube 123 is fixed to the outer sleeve 121 by means of adhesive bonding.
Specifically, referring to fig. 1 and 4, the needle tube 123 is integrally designed, and has a receiving section 1231, an insulating section 1232, and a working section 1233, wherein the receiving section 1231 has an open end and is received inside the outer cannula 121, the working section 1233 is used for directly contacting with human tissue in a subsequent puncturing process, and the length of the working section 1233 and the length of the insulating section 1232 are selected according to actual conditions in a subsequent application process.
In some embodiments of the present invention, referring to fig. 1 and 4, the needle tube 123 is made of a conductive material, and the surface of the outer sidewall of the insulating section 1232 is coated with an insulating coating to avoid unnecessary injury to the operator during subsequent operations.
In some embodiments of the present invention, referring to fig. 1 and 4, the needle tube 123 is made of a non-conductive material, and the outer sidewall surface of the needle tube 123 and the inner sidewall surface of the working section 1233 are coated with a conductive coating to reduce the weight of the split assembly 1 and facilitate energy transfer to the target tissue during subsequent operation. In some specific embodiments of the present invention, the conductive coating is a silver coating or a graphene coating.
In some embodiments of the present invention, referring to fig. 1 and 4, the needle tube 123 is made of the non-conductive material, the needle tube 123 further has a conductive lead (not shown), the inner sidewall surface and the outer sidewall surface of the working section 1233 are coated with the conductive coating, the conductive lead (not shown) is fixedly connected to the outer sidewall of the working section 1233 and has an electrical contact, and the other end of the conductive lead penetrates through the outer sleeve 121 to electrically contact the first conductive tube 13, so as to facilitate energy transfer to the target tissue in the subsequent operation process.
In the process of puncturing lung tumor tissues of a human body, particularly puncturing a lung ground glass shadow by using the split component 1 and carrying out radio frequency ablation, as the average diameter of the lung ground glass shadow is usually 1-2 cm and the lung ground glass shadow is loose, on one hand, the tail part of a traditional ablation needle for liver tumor ablation is heavy, and inaccurate positioning is easily caused by movement in the process of puncturing or radio frequency ablation; on the other hand, the needle contacting with the lung tumor tissue is usually a sharp needle with a prismatic or bevel opening, which easily punctures the lung tumor tissue or the internal blood vessel to cause bleeding or cause the potential tumor cells to be scattered adjacent to the alveoli, even the tumor cells enter the blood system and spread to other tissues, thus seriously endangering the safety of the human body.
On one hand, the needle tube 123 of embodiment 1 has a blunt end structure at the end, which does not puncture the tumor tissue or the internal blood vessel of the lung, and can be smoothly inserted to reach the lesion, thereby effectively preventing the blood vessel in the target tissue from being punctured, preventing bleeding, preventing the sample from being contaminated during the subsequent biopsy process, further improving the safety of use, and being beneficial to ensuring the accuracy of the biopsy structure.
Specifically, referring to fig. 1 and 4, the blunt sealing structure at the end of the needle tube 123 is beneficial to avoiding bleeding during the puncturing process, and after the rf ablation is completed, since the working section 1233 is in contact with the target tissue, a coagulation area is generated in the target tissue under the rf energy to form a biopsy channel, thereby further effectively preventing the possible bleeding problem. After the needle tube 123 is withdrawn from the target tissue, a biopsy is sent from the biopsy channel to perform a biopsy on the ablated part, so that the sample is prevented from being polluted, the use safety is further improved, and the accuracy of a biopsy structure is ensured.
On the other hand, referring to fig. 1, the first needle holder 11 is detachably and fixedly connected with the outer sleeve 121, so that the first water guiding tube 14, the first conducting tube 13 and an ablation handle (not shown) for supplying energy and circulating cooling water are not connected with the first needle body 12 during the puncturing process, and unnecessary damage to the target tissue due to excessive weight can be avoided.
Fig. 5 is a schematic view illustrating an assembly structure among the needle cannula, the first water introduction tube, and the first conductive tube shown in fig. 1.
Fig. 6a is a schematic view of an operating state of the portion a shown in fig. 5.
Referring to fig. 5, a part of the outer surface of one end of the first conductive tube 13 has a symmetrical U-shaped hollow structure 131, and a first conductive pin 132 and a second conductive pin 133 extending along the diameter direction of the first conductive tube 13.
Specifically, the first conductive tube 13 has a second inner diameter, the second inner diameter is used for accommodating the needle tube 123, the outer side wall of the needle tube 123 is tightly attached to the inner side wall of the first conductive tube 13, the second inner diameter is smaller than or equal to the outer diameter of the needle tube 123, after the needle tube 123 is accommodated in the first conductive tube 13, because the first conductive tube 13 has the U-shaped hollow structure 131, the portion of the first conductive tube 13, which is in contact with the needle tube 123, is elastically deformed along the diameter direction, and good sealing performance and electrical contact are further achieved.
In some embodiments of the present invention, the first conductive tube 13 is a hollow cylindrical tube, and the second inner diameter is adapted to the outer diameter of the needle tube 123, so that the outer sidewall of the needle tube 123 is tightly attached to the inner sidewall of the first conductive tube 13.
In some embodiments of the present invention, the inner sidewall of the first conductive tube 13 has a second taper to tightly fit with a portion of the outer sidewall of the needle tube 123 in a taper self-locking manner. The second taper is 3-6 degrees.
Referring to fig. 6a, the needle tube 123 has a third inner diameter for receiving the first conduit 14, and the outer diameter of the first conduit 14 is smaller than the third inner diameter, so as to form a first conduit 61 and a third conduit 63 between the inner sidewall of the needle tube 123 and the outer sidewall of the first conduit 14, and the inside of the first conduit 14 is a second conduit 62.
Example 2
This embodiment provides a handle having a handle body, an inlet tube, an outlet tube, and an energy transmission tube. The handle and the split assembly of example 1 together form a surgical attachment.
Fig. 6b is a schematic view of another operation state of the part a shown in fig. 5, and fig. 7 is a schematic view of a structure of a handle of embodiment 2. Referring to fig. 7, the handle 7 has a handle body 71, an inlet tube 72, an outlet tube 73, and an energy transmission tube 74.
Referring to fig. 1, 2 and 7, the handle body 71 is fixedly connected to the first needle holder 11, and specifically, a partial outer diameter of one end of the handle body 71 is adapted to an inner diameter of the fixing tube 111, so that the handle body 71 is fixed inside the fixing tube 111 by an adhesive manner. The first joint 113 penetrates the bottom of the first joint block 112 and is fixedly connected with the bottom of the first joint block 112 to communicate with the inside of the fixed pipe 111.
Referring to fig. 1 and 7, the first conductive tube 13 is fixed in the handle body 71 to be fixedly connected to a wire bundle (not shown) accommodated in the energy transmission tube 74, and a port of the energy transmission tube 74 is fixedly connected to an energy generating device (not shown).
Referring to fig. 1 and 7, a proximal end of the first water guiding tube 14 penetrates the first needle holder 11 and the handle body 71 to communicate with and fixedly connect with the water inlet tube 72 and the water outlet tube 73, and a port of the water inlet tube 72 and a port of the water outlet tube 73 are fixedly connected with a liquid guiding device (not shown) to provide circulating cooling water into the needle tube 123.
Example 2 also provides a method of use of the surgical attachment for radiofrequency ablation of the target tissue, with reference to fig. 1, 4 and 7, comprising:
s1: after unlocking the first needle holder 11 and the first needle body 12, penetrating the needle tube 123 into the target tissue to make the working section 1233 contact with the target tissue; and then the first needle seat 11 and the first needle body 12 are locked in a screwing mode.
S2: activating a radio frequency generating device (not shown) to transmit radio frequency energy to the needle tube 123 through a wire bundle (not shown) in the energy transmission tube 74 and the first conductive tube 13 to perform a radio frequency ablation operation on the target tissue, and simultaneously activating a drainage device (not shown) to provide circulating cooling water to the inside of the needle tube 123.
Specifically, referring to fig. 5 and 6a, a liquid guiding device (not shown) is activated to provide circulating cooling water, and after the circulating cooling water enters the working end of the needle tube 123 through the second water conduit 62 in the direction B, the circulating cooling water is discharged from the ablation device (not shown) through the first water conduit 61 and the third water conduit 63 in the direction C, so as to control the temperature of the working end and avoid unnecessary damage to human tissues.
In some embodiments of the present invention, referring to fig. 5 and 6B, the circulating cooling water is controlled to enter the working end of the needle tube 123 through the first water conduit 61 and the third water conduit 63 in the direction B, and to exit the ablation device (not shown) through the second water conduit 62 in the direction C.
Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.
Claims (16)
1. A split component is characterized by comprising a needle seat, an outer sleeve part, a needle tube, a conductive part and a liquid guiding part, wherein the split component acts on target tissues in a human body to assist in tissue biopsy;
the needle seat is detachably and fixedly connected with the outer sleeve part;
the needle tube is fixedly connected with the outer sleeve part, one part of the needle tube is accommodated in the outer sleeve part, the other part of the needle tube penetrates out of the outer sleeve part, and the tail end of the needle tube is provided with a blunt head sealing structure;
the conductive part is fixedly connected with the needle tube accommodated in the outer sleeve part so as to transmit energy to the tail end of the needle tube and enable the interior of the conductive part to be communicated with the interior of the needle tube so as to form a liquid guide channel;
the liquid guide part is contained in the liquid guide channel so as to form a liquid inlet passage and a backflow passage in the liquid guide channel.
2. The split assembly of claim 1, wherein the needle cannula and the outer sleeve portion together comprise a total weight of no more than 20 grams, the needle cannula has a wall thickness of no more than 0.5 mm, the needle cannula comprises a material having a density of no more than 8.5 grams per cubic centimeter, and the outer sleeve portion comprises a material having a density of no more than 1.5 grams per cubic centimeter.
3. The split assembly of claim 2, wherein the needle cannula is made of an electrically conductive material, the portion of the needle cannula extending out of the outer sleeve portion is an insulating section and a working section which are connected with each other, the outer surface of the insulating section is provided with an insulating coating, and the end of the working section is provided with the blunt sealing structure.
4. The split assembly of claim 2, wherein the needle cannula is comprised of a non-conductive material having a density of no more than 2 grams per cubic centimeter, a wall thickness of no more than 0.3 millimeters, and an outer surface of the needle cannula having a conductive coating.
5. The split assembly of claim 4, wherein the portion of the needle cannula extending out of the outer sleeve portion has a working section terminating in the blunt sealing structure, and wherein the inner sidewall of the working section has the conductive coating.
6. The split assembly of claim 4, wherein the needle cannula further comprises a conductive lead, one end of the conductive lead is fixedly connected with the outer side wall of the working section, and the other end of the conductive lead penetrates through the outer sleeve part to be electrically connected with the conductive part.
7. The split assembly of claim 1, wherein a portion of an inner sidewall of the conductive portion is in close contact with a portion of an outer sidewall of the needle cannula received in the outer sleeve portion such that an interior of the conductive portion communicates with an interior of the needle cannula.
8. The split assembly of claim 7, wherein at least a portion of an inner sidewall of the conductive portion and at least a portion of an outer sidewall of the needle cannula received in the outer sleeve portion each have a taper of 3 degrees to 6 degrees to facilitate a secure connection of the conductive portion and the needle cannula in a taper self-locking manner.
9. The sub-assembly of claim 1, wherein the liquid inlet passage is defined within the liquid conducting portion and the return passage is defined between an outer surface of the liquid conducting portion and an inner surface of the conductive portion.
10. The sub-assembly of claim 1, wherein the interior of the fluid conducting portion is the return path and the inlet path is between the exterior surface of the fluid conducting portion and the interior surface of the conductive portion.
11. The split assembly of claim 1, wherein the hub and the outer sleeve portion are threadably engaged to provide the releasably secured connection.
12. The split assembly of claim 11, wherein the needle holder has a connector seat, an inner side wall of the connector seat has an internal thread structure, and one end of the outer sleeve portion is provided with a locking portion which is screwed along the internal thread to realize the detachable fixed connection.
13. The split assembly of claim 12, wherein the bottom of the joint seat is further provided with a joint, and at least a part of an outer side wall of the joint is closely attached to a part of an inner side wall of the outer sleeve portion.
14. The split assembly of claim 13, wherein at least a portion of an outer diameter of the joint is adapted to a portion of an inner diameter of the outer sleeve portion.
15. The split assembly of claim 13, wherein at least a portion of an outer sidewall of the joint and at least a portion of an inner sidewall of the outer sleeve portion each have a taper of 3-6 degrees to facilitate a taper-self-locking mating of the joint and the outer sleeve portion.
16. A surgical attachment comprising a handle and the split component of claim 1, wherein one end of the handle is fixedly connected with a needle holder of the split component, and the other end is provided with a liquid inlet portion, a liquid outlet portion and an energy transmission portion, the liquid inlet portion and the liquid outlet portion are used for introducing or discharging a circulating cooling medium into or out of a liquid introduction channel of the split component, and the energy transmission portion is used for supplying energy to a needle tube of the split component through an electric conduction portion of the split component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911242179.0A CN110870783A (en) | 2019-12-06 | 2019-12-06 | Split assembly and surgical accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911242179.0A CN110870783A (en) | 2019-12-06 | 2019-12-06 | Split assembly and surgical accessory |
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| Publication Number | Publication Date |
|---|---|
| CN110870783A true CN110870783A (en) | 2020-03-10 |
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|---|---|---|---|
| CN201911242179.0A Pending CN110870783A (en) | 2019-12-06 | 2019-12-06 | Split assembly and surgical accessory |
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| CN101711705A (en) * | 2009-11-18 | 2010-05-26 | 南京康友微波能应用研究所 | Microwave ablation needle and microwave ablation therapeutic apparatus thereof |
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