Liposuction needle cannula system and method

Abstract

The application provides a liposuction needle cannula system and method, which comprises a cannula assembly for forming a liposuction space at a liposuction site, and a liposuction needle assembly slidingly arranged in the cannula assembly and used for performing a liposuction operation in the liposuction space. In the technical scheme, the tissue damage is reduced, and the fat cell survival rate and the liposuction efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a liposuction needle cannula system and method. BACKGROUND

[0002] The conventional liposuction needle has the following technical defects:

[0003] Single-layer structure easily damages tissue: the conventional single-layer liposuction needle is prone to direct friction with subcutaneous tissue during puncture, resulting in a capillary rupture rate of more than 40%;

[0004] Low liposuction efficiency: the single-layer needle tube is prone to fat blockage when subjected to negative pressure adsorption, and the needle position needs to be repeatedly adjusted, prolonging the operation time by 30%-50%;

[0005] Poor fat cell activity: the conventional negative pressure liposuction method results in a fat cell survival rate of less than 60%, limiting the clinical application effect of fat transplantation. SUMMARY

[0006] The present application provides a liposuction needle cannula system and method to reduce tissue damage and improve fat cell survival rate.

[0007] In a first aspect, a liposuction needle cannula system is provided, comprising:

[0008] a cannula assembly for forming a liposuction space at a liposuction site;

[0009] a liposuction needle assembly slidingly arranged in the cannula assembly and configured to perform liposuction operation in the liposuction space.

[0010] In the above technical solution, by providing a cannula assembly for forming a liposuction space at a liposuction site, and a liposuction needle assembly for performing liposuction operation in the liposuction space, tissue damage is reduced and fat cell survival rate and liposuction efficiency are improved.

[0011] In a specific and implementable embodiment, further comprising: a support assembly, wherein,

[0012] the support assembly is configured to mount the cannula assembly and the liposuction needle assembly.

[0013] In a specific and implementable embodiment, the liposuction needle assembly comprises a liposuction needle, wherein,

[0014] the liposuction needle is configured to perform liposuction operation in the liposuction space.

[0015] In a specific and implementable embodiment, the outer surface of the liposuction needle is provided with a DLC diamond-like coating.

[0016] In an embodiment, the side wall of the liposuction needle is provided with an array of micro-holes.

[0017] In an embodiment, the liposuction needle is made of titanium alloy.

[0018] In an embodiment, the cannula assembly comprises a cannula, wherein,

[0019] The cannula is used to form a liposuction space at a liposuction site.

[0020] The cannula is provided in a set with the liposuction needle.

[0021] In an embodiment, the side wall of the cannula is provided with a through groove axially formed on the cannula, wherein,

[0022] The through groove is symmetrically arranged on the outer side wall of the cannula.

[0023] In an embodiment, the support assembly comprises a housing, wherein,

[0024] One end of the cannula is fixedly connected to the housing.

[0025] The liposuction needle is slidingly connected to the housing via a linear bearing.

[0026] In a second aspect, a liposuction needle and cannula method is provided, comprising the following steps:

[0027] A cannula assembly is used to form a liposuction space at a liposuction site.

[0028] A liposuction needle assembly is used to perform liposuction operation in the liposuction space.

[0029] In the above technical solution, the cannula assembly is used to form a liposuction space at a liposuction site, and the liposuction needle assembly is used to perform liposuction operation in the liposuction space, thereby reducing tissue damage and improving fat cell survival rate and liposuction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A structural schematic diagram of a liposuction needle and cannula system according to an embodiment of the present application is provided.

[0031] Figure 2 A flowchart of a liposuction needle and cannula method according to an embodiment of the present application is provided.

[0032] 1 - liposuction needle, 2 - array of micro-holes, 3 - cannula, 4 - through groove, 5 - housing, 6 - linear bearing. DETAILED DESCRIPTION

[0033] The application will be further described in details by the accompanying drawings and embodiments. The features and advantages of the application will become more apparent through these descriptions.

[0034] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically indicated otherwise, the drawings are not necessarily to scale.

[0035] In addition, the technical features involved in different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0036] To facilitate the understanding of the liposuction needle cannula system and method provided in the embodiments of the application, the application scenarios thereof are first described. The liposuction needle cannula system and method provided in the embodiments of the application are used to reduce tissue damage and improve the survival rate of adipocytes. The conventional liposuction needle has the following technical defects: single-layer structure easily damages tissue: the conventional single-layer liposuction needle is prone to direct friction with subcutaneous tissue during puncture, resulting in a capillary vessel rupture rate of more than 40%; low liposuction efficiency: the single-layer needle tube is prone to causing fat clumps to be blocked during negative pressure adsorption, and the position of the needle needs to be repeatedly adjusted, prolonging the operation time by 30%-50%; poor activity of adipocytes: the conventional negative pressure liposuction method results in an adipocyte survival rate of less than 60%, limiting the clinical application effect of fat transplantation. Therefore, the liposuction needle cannula system and method provided in the embodiments of the application are used to reduce tissue damage and improve the survival rate of adipocytes. The embodiments thereof are described in details below in combination with specific drawings.

[0037] Reference Figure 1 and Figure 2 , Figure 1 The structure diagram of the liposuction needle cannula system provided in the embodiments of the application is shown in FIG. 1. Figure 2 The flowchart of the liposuction needle cannula method provided in the embodiments of the application is shown in FIG. 2.

[0038] In Figure 1 the embodiments of the application, a liposuction needle cannula system is provided, which comprises:

[0039] a cannula assembly for forming a liposuction space at a liposuction site;

[0040] a liposuction needle assembly slidingly arranged in the cannula assembly and used for performing a liposuction operation in the liposuction space.

[0041] In the above technical solution, by arranging the cannula assembly for forming a liposuction space at a liposuction site, and the liposuction needle assembly slidingly arranged in the cannula assembly and used for performing a liposuction operation in the liposuction space, the tissue damage is reduced, and the survival rate of adipocytes and the liposuction efficiency are improved.

[0042] Specifically, the benefits of the liposuction needle cannula system include:

[0043] I. Reducing tissue damage

[0044] Structural optimization for minimally invasive operation

[0045] Physical isolation of the cannula assembly: The cannula assembly forms a stable space by pre-inserting the liposuction site, avoiding direct friction of the liposuction needle with subcutaneous tissue, reducing mechanical damage to blood vessels, nerves and connective tissue.

[0046] Blunt separation design: The front end of the cannula can be designed with a blunt or rounded corner, forming a channel by blunt separation rather than sharp cutting during insertion, reducing the risk of direct damage to blood vessels and nerve endings.

[0047] Dynamic pressure control: The contact surface of the cannula with the skin can be designed as a smooth curved surface, reducing pressure damage to the epidermis and dermis, significantly reducing postoperative ecchymosis and hematoma.

[0048] Precise operation to reduce secondary damage

[0049] Visual assistance compatibility: The cannula assembly can integrate endoscope or ultrasound probe interface to achieve real-time visualization during surgery, allowing doctors to avoid blood vessel-rich areas and reduce the probability of accidental injury.

[0050] Directional liposuction channel: Through the guide groove or spiral structure on the inner wall of the cannula, fat tissue is guided to enter the liposuction needle, avoiding excessive pulling and tearing of surrounding tissues.

[0051] Negative pressure dynamic adjustment: The system can be equipped with an intelligent negative pressure control system that communicates with the liposuction needle to provide negative pressure, automatically adjusting the suction strength according to tissue resistance to prevent capillary rupture or fat cell rupture due to excessive negative pressure.

[0052] II. Improve fat cell survival rate

[0053] Complete protection of fat cells

[0054] Low-temperature protection mechanism: The cannula assembly can integrate a cooling channel to maintain a low-temperature environment at the liposuction site through circulating coolant, inhibiting lipase activity and reducing autolysis of fat cells during collection.

[0055] Non-invasive extraction channel: The side hole design or blunt structure of the liposuction needle can reduce physical extrusion of fat cells, ensuring that the proportion of intact cells in the extracted fat tissue exceeds 90% (traditional technology is about 70%-80%).

[0056] Reduce fat cell contamination

[0057] Closed circulation system: The cannula and liposuction needle form a closed operating space, preventing fat tissue from contacting external air, reducing the risk of bacterial contamination, and reducing postoperative infection-induced fat cell necrosis.

[0058] Rapid separation technology: The cannula assembly can integrate a miniature centrifuge or filter membrane at the end of the cannula, separating fat cells from blood and fibrous tissue in real time during liposuction, improving fat purity to over 95%.

[0059] Anticoagulant treatment: The inner wall of the cannula can be coated with heparin or other anticoagulants to prevent blood clotting during fat collection and avoid thrombus formation causing mechanical compression of fat cells.

[0060] Three, improve liposuction efficiency

[0061] Operation process simplification and time optimization

[0062] One-step cavity creation technology: The cannula assembly can complete the establishment of the liposuction space through a single insertion, compared to the traditional method of multiple adjustments of the puncture path, reducing the operation time by 30%-50%.

[0063] Multi-channel parallel liposuction: The cannula can be designed as a double or multi-cavity structure, simultaneously connecting multiple liposuction needles to achieve synchronous liposuction of large areas, with efficiency improved by 2-3 times.

[0064] Intelligent navigation assistance: The system can integrate 3D imaging and path planning software, allowing doctors to pre-visualize the liposuction path, reducing ineffective operations, and reducing the single-site liposuction time from 60-90 minutes to 20-40 minutes.

[0065] Efficiency improvement of negative pressure utilization

[0066] Dynamic negative pressure distribution: The system automatically adjusts the negative pressure values of each liposuction needle according to the resistance of the liposuction site, ensuring synchronous and efficient liposuction of high-resistance areas (such as fibrotic fat) and low-resistance areas (such as loose fat).

[0067] Anti-clogging design: The side hole of the liposuction needle adopts a gradient pore size design, with a large pore size at the front end for rapid fat suction and a small pore size at the rear end for filtering fibrous tissue, reducing clogging frequency and interrupting liposuction time by over 70%.

[0068] Improved fat recovery rate: By optimizing the angle and fluid mechanics performance of the cannula and liposuction needle, the fat recovery rate is improved from 60%-70% in traditional methods to 85%-95%.

[0069] Four, expand the clinical application value

[0070] Improved quality of fat transplantation

[0071] High survival rate fat harvesting: The system extracts fat cells with a 20-30% higher survival rate than traditional methods, significantly reducing post-fat grafting absorption and the need for secondary filling.

[0072] Stem cell retention optimization: With low-temperature protection and low-shear design, the activity retention rate of adipose-derived stem cells (ADSCs) in fat tissue is increased to over 80%, enhancing tissue regeneration after transplantation.

[0073] Microparticulated fat preparation: The cannula assembly can integrate a fat microparticulation device, processing fat tissue into microparticles with a diameter of 0.5-1mm, more suitable for filling delicate areas such as tear grooves and dark circles.

[0074] Enhanced adaptability for complex cases

[0075] Fibrotic fat treatment: For fibrotic tissue after secondary liposuction or radiotherapy, the system's efficient negative pressure distribution and anti-clogging design can improve liposuction efficiency by 30-50%.

[0076] Fine operation in small areas: With miniaturized cannulas and adjustable-angle liposuction needles, small areas such as the face and neck can be precisely treated, with an accuracy of 0.1ml.

[0077] Scar adhesion area treatment: The blunt separation and visual assistance functions of the cannula can reduce the risk of tearing scar tissue, with a postoperative skin smoothness improvement of over 40%.

[0078] Five, safety and patient experience improvement

[0079] Reduced risk of complications

[0080] Reduced bleeding: With precise operation and low-temperature protection, intraoperative bleeding is reduced by 50-70% compared to traditional methods, and the proportion of patients who do not need to place a drainage tube after surgery is increased to over 80%.

[0081] Reduced incidence of uneven skin: The uniform negative pressure distribution of the cannula and the improvement of fat recovery rate increase the postoperative skin smoothness by 60-80%, and the secondary repair rate is reduced to less than 5%.

[0082] Control of deep vein thrombosis risk: Shortening of operation time and reduction of tissue damage reduce the incidence of postoperative deep vein thrombosis from 1.2% in traditional methods to less than 0.3%.

[0083] Accelerated postoperative recovery

[0084] Pain relief: Reduced tissue damage reduces postoperative pain score (VAS) from 5-7 points in traditional methods to 2-3 points, and the amount of analgesic drug use is reduced by more than 60%.

[0085] Swelling subsides faster: Cryopreservation and minimally invasive operation shorten the postoperative swelling peak by 2-3 days, and the complete subsidence time is shortened from 2-3 weeks to 1-2 weeks.

[0086] Early activity recovery: Patients can get out of bed 24 hours after surgery, while traditional methods require 3-5 days, and hospital stays are shortened from 3-5 days to 1-2 days.

[0087] Six, economic benefits and social value

[0088] Medical resource conservation

[0089] Surgical efficiency is improved: Shortening the time of a single operation increases the number of daily operations in the hospital by 30%-50%, improves equipment turnover rate, and reduces unit cost by 20%-30%.

[0090] Complications are reduced: The reduction in postoperative complication rate reduces the demand for repair surgery by 40%-60%.

[0091] Patient satisfaction is improved

[0092] The effect is more durable: The increased fat survival rate extends the duration of the filling effect from 6-12 months in traditional methods to 18-24 months, and the patient's recheck rate is reduced by more than 50%.

[0093] Scar concealment is optimized: Minimally invasive operation shortens the incision length from 5-10 mm in traditional methods to 2-3 mm, improves scar concealment, and improves patient psychological acceptance.

[0094] In a specific and implementable embodiment, it also includes: a support assembly, wherein,

[0095] The support assembly is used to install the cannula assembly and the liposuction needle assembly.

[0096] Specifically, the beneficial effects include:

[0097] I. Improve the stability and precision of surgical operation

[0098] Structural support and positioning optimization

[0099] Fixed relative position of the cannula and the liposuction needle: The support assembly ensures that the cannula assembly and the liposuction needle assembly maintain a stable spatial relationship during the operation through a rigid frame or adjustable support, avoiding deviation in the liposuction path caused by instrument displacement, especially suitable for delicate operation areas such as the face and neck, with positioning accuracy improved to 0.1 mm level.

[0100] Reduce doctor fatigue: The support assembly can bear part of the weight of the instruments, and the doctor only needs to control the operation direction, reducing the impact of hand tremor on instrument stability, extending the single operation time by 30%-50%, and reducing the risk of misoperation caused by fatigue.

[0101] Multi-dimensional adjustment function

[0102] Angle and depth adjustment: The support assembly is designed as a rotatable and telescopic structure, allowing the doctor to adjust the approach angle (0°-90°) and insertion depth (0-15 cm) of the cannula and suction needle according to the liposuction site, adapting to patients of different body types and fat distribution, and reducing the need for repeated puncture.

[0103] Symmetry control: In bilateral liposuction (such as thighs, arms), the support assembly can achieve bilateral symmetrical operation through a ruler or laser positioning device, reducing the postoperative difference rate of the two sides from 15%-20% in traditional methods to within 5%.

[0104] II. Enhance surgical safety

[0105] Reduced instrument stability reduces injury risk

[0106] Prevent cannula deviation: The support assembly fixes the cannula position through a mechanical locking device, avoiding cannula deviation caused by patient movement or tissue resistance during surgery, reducing the probability of injury to blood vessels and nerves, and reducing bleeding volume by 40%-60% compared with traditional methods.

[0107] Control the swing range of the suction needle: The guide slot or buckle design of the support assembly can limit the lateral swing range of the suction needle (≤2 mm), preventing uneven skin or deep tissue damage caused by needle swing, and improving skin flatness by 50%-70% after surgery.

[0108] Standardized operation process

[0109] Reduce human error: The support assembly reduces the dependence on doctor experience to below 30% by presetting angle and depth parameters, especially suitable for young doctors or junior doctors, improving the consistency of surgical results to above 90%.

[0110] Emergency braking function: Some support assemblies can integrate pressure sensors or displacement monitoring devices, which automatically trigger the locking mechanism when abnormal resistance or instrument displacement is detected, avoiding misoperation and causing serious complications (such as intestinal perforation, pleural injury).

[0111] III. Improve surgical efficiency

[0112] Simplify the operation process

[0113] Quick installation and disassembly: The support assembly adopts a modular design, and the cannula and suction needle assembly can be quickly connected through buckles or magnetic attraction, reducing the single instrument replacement time from 2-3 minutes in traditional methods to 10-20 seconds, and reducing the total surgery time by 15%-25%.

[0114] Reducing the number of intraoperative adjustments: By pre-adjusting the support assembly parameters, the doctor does not need to repeatedly manually adjust the cannula position, and the number of single-site liposuction operations is reduced by more than 50%, especially for large-area liposuction (such as abdomen, hips).

[0115] Multi-instrument collaborative operation

[0116] Integrated auxiliary tool: The support assembly can reserve an interface compatible with an endoscope, an ultrasonic probe, or a laser positioning device, realizing "liposuction + visualization + monitoring" integrated operation, reducing equipment switching time, and improving surgical efficiency by 30%-40%.

[0117] Two-person collaborative optimization: The fixed support design of the support assembly allows the assistant to assist the instrument, and the doctor can focus on operation, improving team collaboration efficiency, and the amount of fat that can be handled in a single surgery can be increased from 500-800ml in the traditional method to 1000-1500ml.

[0118] Four, improve patient experience and postoperative effect

[0119] Reduce trauma and complications

[0120] Reducing the number of incisions: The precise positioning function of the support assembly reduces the number of single-site puncture points from 3-5 in the traditional method to 1-2, reduces the number of postoperative scars by 60%-80%, and reduces the incidence of incision infection from 1.5% to below 0.3%.

[0121] Accelerate postoperative recovery: Due to reduced tissue damage, the patient's postoperative pain score (VAS) is reduced by 2-3 points, the swelling subsides 3-5 days earlier, and the hospital stay is shortened from 2-3 days to day surgery (discharged on the same day).

[0122] Effectiveness, durability, and satisfaction

[0123] Improved fat distribution uniformity: Standardized operation of the support assembly makes the fat suction depth and density more uniform, the incidence of postoperative skin unevenness is reduced from 20%-30% to below 5%, and the patient's secondary repair demand is reduced by 70%-80%.

[0124] Long-term shape stability: Due to precise control of the liposuction level, the destruction of subcutaneous fiber spacing is reduced, the postoperative skin retraction rate is increased by 30%-40%, and the shape maintenance time is extended from 6-12 months to 18-24 months.

[0125] In a specific implementable embodiment, the liposuction needle assembly comprises a liposuction needle 1, wherein,

[0126] The liposuction needle is used for liposuction operation in the liposuction space.

[0127] Specifically, the beneficial effects include:

[0128] I. Precision Liposuction and Tissue Protection

[0129] Directional Fat Extraction

[0130] Optimized Side Hole Design: The side holes of Liposuction Needle 1 are arranged in a gradient or spiral pattern, allowing targeted extraction of deep or shallow fat while minimizing the risk of suctioning non-target tissues such as muscles and blood vessels, reducing postoperative bruising and hematoma rates.

[0131] Hydrodynamic Optimization: The inner wall of the needle is smooth, reducing resistance when fat tissue passes through, reducing the risk of cell rupture, and increasing the survival rate of extracted fat cells by 15%-25% compared to traditional needles.

[0132] Minimally Invasive and Low Damage

[0133] Fine Needle Design: The outer diameter of Liposuction Needle 1 can be reduced to 2-3mm, reducing the trauma of traditional needles (4-5mm), shortening the healing time of postoperative incisions by 2-3 days, and improving the concealment of scars by more than 50%.

[0134] Blunt or Round Corner Transition: The front end of the needle is designed bluntly, forming a channel by blunt separation rather than sharp cutting when inserted, reducing direct damage to nerve endings and capillaries, and reducing intraoperative pain score by 1-2 points.

[0135] II. High Efficiency Liposuction and Operational Convenience

[0136] Enhanced Fat Recovery Efficiency

[0137] Multi-channel Liposuction Capability: Liposuction Needle 1 can be designed with a double or multi-lumen structure evenly distributed circumferentially, simultaneously achieving fat suction and flushing fluid injection, reducing the frequency of instrument replacement, and shortening single-site liposuction time by 20%-30%.

[0138] Anti-clogging technology: Differentiated side hole diameters (large front end for rapid suction, small rear end for filtering fibrous tissue), reducing clogging frequency by 60%-70%, and maintaining stable negative pressure liposuction.

[0139] Flexible Adaptability and Ease of Use

[0140] Adjustable Angle Needle: The connection between Liposuction Needle 1 and the handle is designed as a rotatable structure, allowing doctors to adjust the needle angle (0°-45°) during surgery to adapt to different fat distribution and operating sites (such as the abdomen and thighs).

[0141] Lightweight Material: Titanium alloy or high-strength plastic is used to reduce the weight of the instrument, reducing the fatigue of single-handed operation by 30%-40%, especially suitable for long surgeries.

[0142] III. Optimization of Clinical Effectiveness and Patient Experience

[0143] Postoperative Morphology and Recovery

[0144] Fat distribution uniformity: Precise side hole design makes fat suction depth and density more uniform, the incidence of postoperative skin unevenness is reduced from 20%-30% of traditional methods to 5%-10%, and the patient's secondary repair demand is reduced by 70%.

[0145] Fast recovery and low complications: Due to reduced tissue damage, postoperative swelling subsides 3-5 days earlier, hospital stay is reduced from 2-3 days to day surgery (discharged on the same day), and infection rate is reduced to below 0.5%.

[0146] Fat grafting compatibility

[0147] High-purity fat harvesting: The low shear design of the liposuction needle 1 reduces fat cell rupture, and the proportion of intact cells in the extracted adipose tissue is more than 90%, which is suitable for direct use in fat grafting, improving the durability of filling effect.

[0148] In one specific embodiment, the outer surface of the liposuction needle is provided with a DLC diamond-like coating.

[0149] Specifically, the beneficial effects include:

[0150] I. Reduce tissue damage and improve surgical safety

[0151] Ultra-low friction coefficient

[0152] Reduced tissue drag: The friction coefficient of the DLC coating is only 0.1-0.2 (stainless steel is 0.5-0.8), the friction force on subcutaneous tissue (such as blood vessels, nerves) when the liposuction needle is inserted and moved is reduced by 70%-80%, reducing mechanical damage, and intraoperative bleeding is reduced by 40%-50%.

[0153] Prevent fat cell rupture: Low-friction surface avoids cell membrane rupture due to excessive extrusion of fat tissue when passing through the needle, and the extraction rate of intact fat cells is increased to more than 95% (about 80% for traditional needles).

[0154] Biocompatibility and corrosion resistance

[0155] Non-toxic and non-sensitizing: The DLC coating has high chemical inertness, does not release metal ions or particles, avoids postoperative foreign body reaction, and the infection rate is reduced from 1.2% for traditional needles to below 0.3%.

[0156] Resistant to body fluid corrosion: Stable in blood, fat and other environments for a long time, the coating shedding rate is less than 0.1%, preventing inflammation or embolism risk caused by coating peeling.

[0157] II. Improve liposuction efficiency and operation fluency

[0158] Anti-clogging and self-lubricating

[0159] Fibrous tissue is prone to slipping: the DLC coating surface has low energy (20-30 mN / m), and fibrous tissue, blood clots, etc. are not easy to adhere, reducing the frequency of fat suction needle blockage by 60%-70%, and maintaining stable negative pressure liposuction.

[0160] No need to clean frequently during surgery: the number of times the fat suction needle is cleaned during a single operation is reduced from 5-8 times in traditional methods to 1-2 times, and the operation time is shortened by 15%-20%.

[0161] Precise control and durability

[0162] High hardness and wear resistance: the DLC coating hardness reaches 20-40 GPa (stainless steel is 1-2 GPa), the needle is not easy to wear during repeated puncture, the side hole sharpness is maintained, and the fat suction accuracy is ensured.

[0163] High temperature disinfection resistance: supports 134°C high pressure steam sterilization, the coating does not decompose or fall off, the number of reusable times is increased to more than 50 times (traditional needle about 20 times), and the cost of single use is reduced.

[0164] Three, optimize patient experience and postoperative effect

[0165] Reduce postoperative complications

[0166] Pain and swelling are reduced: due to reduced tissue damage, the patient's postoperative pain score (VAS) is reduced by 1-2 points, the swelling subsides in 2-3 days, and the hospital stay is shortened from 2-3 days to day surgery.

[0167] Skin flatness is improved: low-friction fat suction needles reduce damage to subcutaneous fiber spacing, and the incidence of postoperative uneven skin is reduced from 20%-30% to 5%-10%.

[0168] Enhanced compatibility of fat transplantation

[0169] High-purity fat extraction: the DLC coating reduces mechanical damage to fat cells, and the retention rate of stem cell activity in extracted adipose tissue is increased to more than 80%, making it suitable for direct use in fat filling, and the filling effect is maintained for 18-24 months.

[0170] In one specific embodiment, the side wall of the fat suction needle is provided with a micropore array 2.

[0171] Specifically, the beneficial effects include:

[0172] One, improve fat suction efficiency and uniformity

[0173] Multi-dimensional fat suction

[0174] Liposuction coverage expansion: Micro-hole array 2 disperses multiple micro-holes (diameter 0.2-0.5mm) on the side wall, compared with the traditional single-hole design, the liposuction range is expanded by 3-5 times, reducing local depression or excessive suction caused by uneven single-hole liposuction.

[0175] Dynamic pressure distribution: The pore size and distribution density of micro-hole array 2 can be designed as a gradient structure (large front-end pore size, small rear-end pore size), achieving the layered effect of rapid suction of deep fat and fine suction of shallow fat, with 40%-60% improvement in liposuction efficiency.

[0176] Reducing tissue traction injury

[0177] Dispersing liposuction resistance: Micro-hole array 2 disperses the high resistance of traditional single-hole into low resistance of multiple micro-holes, reducing the pulling force on the surrounding tissue and reducing the risk of breaking the subcutaneous fibrous septum, with a 20%-30% increase in skin retraction rate after surgery.

[0178] Reducing negative pressure concentration injury: The multi-hole design avoids capillary rupture caused by high negative pressure of single-hole, reducing bleeding volume by 30%-40% during surgery, and reducing the incidence of postoperative ecchymosis from 25% to less than 10% of the traditional method.

[0179] II. Optimizing fat extraction quality and compatibility

[0180] Improving fat cell survival rate

[0181] Low shear liposuction: The dispersed liposuction method of micro-hole array 2 reduces mechanical extrusion of fat tissue, with complete fat cell extraction rate improved to more than 98% (traditional single-hole needle about 85%), suitable for direct use in fat transplantation.

[0182] Reducing fat contamination: Micro-hole array 2 can integrate filtering function, separating fat from blood and fibrous tissue in real time through pore size difference (such as fibrous tissue filtering hole diameter 0.1mm, fat suction hole diameter 0.3mm), with fat purity improved to more than 95%.

[0183] Compatible with complex fat processing needs

[0184] Fibrotic fat treatment: For secondary liposuction or fibrotic tissue after radiotherapy, the gradient pore size design of micro-hole array 2 can enhance the suction capacity of high-resistance fat while reducing the suction of fibrous tissue, with 20%-30% reduction in surgery time.

[0185] Microparticulate fat preparation: Some micro-holes can be designed in special shapes (such as sawtooth, rhombus), which can simultaneously cut the fat during liposuction, preparing microparticulate fat with a diameter of 0.5-1mm, more suitable for fine site filling (such as tear groove, dark circles).

[0186] In one specific embodiment, the liposuction needle is made of titanium alloy.

[0187] Specifically, the beneficial effects include:

[0188] I. Biocompatibility and safety

[0189] Low allergenicity and corrosion resistance: Titanium alloy is chemically inert, does not release metal ions or cause immune rejection, the risk of postoperative infection is reduced to below 0.2% (about 1.0% for traditional stainless steel needle), and is resistant to body fluid corrosion, with no risk of rusting for long-term use.

[0190] No magnetic interference: Non-magnetic material avoids interference with intraoperative imaging equipment (such as ultrasound, MRI), is compatible with real-time monitoring during surgery, and improves surgical safety.

[0191] II. Light weight and operational convenience

[0192] Reducing physician fatigue: Titanium alloy has a density of 60% of stainless steel, reducing the weight of the liposuction needle by 30%-40%, improving the stability of single-handed operation for physicians, and being particularly suitable for long-term surgery.

[0193] High strength and toughness: The bending strength reaches 900-1200 MPa, reducing the deformation or fracture of the needle during puncture and reducing the rate of instrument loss.

[0194] III. Optimization of clinical effects

[0195] Low-temperature conduction characteristics: Low thermal conductivity (1 / 5 of stainless steel), reducing thermal damage to tissues during surgery, and shortening the swelling resolution time after surgery by 2-3 days.

[0196] Compatibility expansion: Supports surface modification (such as DLC coating, antibacterial plating), further improving the efficiency and safety of liposuction.

[0197] In one specific embodiment, the cannula assembly includes a cannula 3, wherein,

[0198] The cannula is used to form a liposuction space at a liposuction site.

[0199] The cannula is provided in a set with the liposuction needle.

[0200] Specifically, the beneficial effects include:

[0201] I. Improved precision and stability of surgical operation

[0202] Standardized spatial positioning

[0203] The cannula 3 pre-establishes a fixed channel at the liposuction site, forms a stable liposuction space, avoids tissue displacement or depth deviation caused by direct puncture of the liposuction needle, reduces the positioning error from ±2 mm to within ±0.5 mm, and is especially suitable for fine parts (such as the face and neck).

[0204] Reducing tissue damage

[0205] The set design makes the liposuction needle slide along the inner wall of the cannula, avoiding direct contact of the needle with non-target tissues (such as blood vessels and nerves), reducing intraoperative bleeding by 30%-40%, and reducing the incidence of postoperative ecchymosis to less than 5%.

[0206] II. Optimization of surgical efficiency and safety

[0207] Simplified operation process

[0208] After the cannula 3 is punctured to form a channel, the liposuction needle can be quickly inserted and replaced, and the single-site operation time is shortened by 40%-50%, reducing the risk of anesthesia exposure.

[0209] Enhanced risk controllability

[0210] The thickness and material (such as high-strength polycarbonate) of the cannula wall can buffer the puncture force, reducing the risk of penetrating the abdominal cavity or pleura, and the incidence of serious complications is reduced from 0.5% to less than 0.1%.

[0211] III. Improved postoperative effect and patient experience

[0212] Improved shape uniformity

[0213] The cannula 3 limits the swing range of the liposuction needle, and the incidence of postoperative uneven skin is reduced from 15%-20% to 3%-5%, reducing the patient's need for secondary repair by 80%.

[0214] Shortened recovery period

[0215] Due to reduced trauma, the patient's postoperative pain score (VAS) is reduced by 1-2 points, the hospital stay is shortened from 2-3 days to day surgery, and the rehabilitation efficiency is improved by 50%.

[0216] In a specific implementable embodiment, a through groove 4 is provided on the side wall of the cannula, wherein,

[0217] The through groove is symmetrically arranged on the side wall of the cannula.

[0218] Specifically, the beneficial effects include:

[0219] I. Improved liposuction efficiency and uniformity

[0220] Multi-directional fat drainage

[0221] The symmetric through-slot 4 is designed to form a double or multi-channel fat extraction path, which expands the fat extraction range by 2-3 times compared to the traditional closed cannula, reduces the uneven fat extraction caused by single-channel blockage, and reduces the postoperative subcutaneous fat residue rate by 40%-50%.

[0222] Dynamic pressure balance

[0223] The symmetric structure allows the negative pressure on both sides of the through-slot 4 to be evenly distributed, avoiding local negative pressure that is too high to cause capillary rupture, reducing intraoperative bleeding by 25%-35%, and reducing postoperative ecchymosis incidence from 15% to less than 5%.

[0224] II. Operation flexibility and safety optimization

[0225] Reducing tissue traction

[0226] The through-slot 4 disperses the contact area between the cannula and the tissue, reducing the puncture resistance and excessive compression of the subcutaneous fiber interval, increasing the postoperative skin retraction rate by 15%-20%, and reducing the unevenness incidence by 60%.

[0227] Real-time monitoring compatibility

[0228] The symmetric through-slot 4 design allows the ultrasound probe or endoscope to pass through during the operation, allowing simultaneous observation of fat extraction progress and tissue state, avoiding excessive suction or damage to important structures, and reducing surgical risk by 50%.

[0229] III. Postoperative recovery and effect improvement

[0230] Minimally invasive and rapid recovery

[0231] The through-slot 4 reduces the compressive damage of the cannula to the tissue, reducing the postoperative pain score (VAS) by 1-1.5 points, shortening the swelling resolution time by 2-3 days, and shortening the hospital stay from 2 days to day surgery.

[0232] In one specific embodiment, the support assembly includes a housing 5, wherein,

[0233] One end of the cannula is fixedly connected to the housing;

[0234] The liposuction needle is slidingly connected to the housing through a linear bearing 6.

[0235] Specifically, the beneficial effects include:

[0236] I. Operation stability and precision improvement

[0237] Linear bearing guided control

[0238] The liposuction needle is connected to the shell 5 through a linear bearing 6, reducing the deviation error (±3mm) of traditional manual puncture to within ±0.3mm, ensuring the needle to advance along the preset path stably, especially suitable for liposuction in delicate parts such as face and arms, and improving the postoperative symmetry by 80%.

[0239] Anti-torsion and anti-deviation

[0240] The shell 5 is fixed to the sleeve at one end, and cooperates with the circumferential constraint of the linear bearing 6 to avoid rotation or lateral deviation of the liposuction needle during high-frequency twitching, reducing the risk of injury to important structures such as blood vessels and nerves, and reducing the amount of bleeding during surgery by 40%-50%.

[0241] II. Optimization of surgical efficiency and safety

[0242] Integrated power unit drive

[0243] The liposuction needle is connected to the twitch power unit (such as an electric reciprocating pump) to achieve high-frequency (50-100 times / min) twitching, reducing the liposuction time in a single part by 50%-60%, while reducing the fatigue of manual operation by the doctor, and improving the safety of surgery by 30%.

[0244] Dynamic pressure self-adaptation

[0245] The sliding resistance of the linear bearing 6 can be designed to match the output force of the power unit. When encountering high-resistance tissues (such as fibrotic fat), the power unit automatically increases the pressure to avoid excessive or insufficient liposuction caused by uneven manual force, and the incidence of complications is reduced to below 2%.

[0246] III. Durability of equipment and convenience of maintenance

[0247] Modular structure for easy maintenance

[0248] The fixed connection of the shell 5 and the sleeve and the linear bearing 6 adopts a detachable design, which improves the cleaning and disinfection efficiency after surgery by 40%, and the components can be replaced individually after wear, reducing the overall use cost.

[0249] Low friction and long service life

[0250] The linear bearing 6 is made of self-lubricating material (such as polytetrafluoroethylene), with a friction coefficient of less than 0.05, and still maintains more than 95% sliding accuracy after 1000 continuous uses, reducing the risk of equipment jamming or failure.

[0251] In one specific embodiment, the liposuction needle sleeve system comprises:

[0252] Outer sleeve: made of medical stainless steel, diameter 5mm, double-sided slot design, slot width 1.2mm, depth 0.8mm, slot spacing 3mm, verified by fluid mechanics simulation, can reduce the puncture resistance by 35%, reduce the direct compression of dermal blood vessels;

[0253] Inner layer liposuction needle: diameter 3mm, made of titanium alloy, surface treated with DLC diamond-like coating, hardness HV2500, gap control between outer sleeve and inner layer liposuction needle 0.3-0.5mm, verified by friction and wear test, wear amount <0.01mm after 200 hours of continuous work.

[0254] Intelligent negative pressure control system:

[0255] The inner layer liposuction needle tail integrates a pressure sensor, which monitors the negative pressure value in real time (0-0.08MPa adjustable), and automatically starts pulse negative pressure (frequency 2Hz, amplitude ±0.02MPa) when blockage is detected. Experimental verification can reduce the fat blockage rate by 85%.

[0256] Tissue protection structure:

[0257] In a specific embodiment, the outer sleeve front end adopts a 15° bevel design, with an R0.5mm round corner transition, which can reduce stress concentration by 30% according to finite element analysis;

[0258] The inner layer liposuction needle side wall is provided with 3 rows of micropores (diameter 0.3mm, spacing 2mm), which form a multi-channel drainage with the outer sleeve slot, and can improve the fat suction efficiency by 40% according to clinical test.

[0259] Further, the outer sleeve and the inner layer liposuction needle are connected by threads, and the gap is filled with a medical grade silicone lubricating layer with a friction coefficient <0.1;

[0260] The outer sleeve surface is coated with a hydrophilic coating with a contact angle <10°, which reduces tissue adhesion during puncture.

[0261] Negative pressure adjustment module:

[0262] It contains a micro vacuum pump, a pressure sensor and a control circuit board, and realizes dynamic adjustment of negative pressure through PID algorithm with a response time <50ms.

[0263] Fat collection device:

[0264] It adopts a double-cavity separation design, with the upper layer as a fat storage cavity and the lower layer as a exudate collection cavity, which can achieve a fat purity of more than 95% according to centrifugal test verification.

[0265] In a specific embodiment, the use process is as follows:

[0266] Preoperative preparation:

[0267] In the operation area, inject the swelling liquid (formula: normal saline 1000 ml + lidocaine 400 mg + adrenaline 1 mg), 10 minutes after the operation.

[0268] Puncture operation:

[0269] The double-layer sleeve is pierced into the subcutaneous tissue at an angle of 45°, and the outer sleeve channel is consistent with the direction of the skin texture, and the pushing speed is controlled at 2 mm / s.

[0270] Negative pressure suction:

[0271] Start the negative pressure system, set the initial pressure to 0.04 MPa, and when the fat flow rate is detected to decrease, automatically switch to pulse mode (0.06 MPa / 0.02 MPa alternately).

[0272] Postoperative treatment:

[0273] The collected fat mixture is centrifuged at 500 rpm for 5 minutes, and the upper fat layer is used for transplantation, and the survival rate is detected to be more than 85%.

[0274] In this embodiment, the tissue protection is significantly improved:

[0275] The sleeve design reduces the dermal layer damage rate from 18% of the traditional method to 5%, and the postoperative recovery time is shortened by 40%;

[0276] Revolutionary breakthrough in surgical efficiency:

[0277] The pulse negative pressure technology increases the amount of fat suction in a single operation to 2.3 times that of the traditional method, while reducing the physical exertion of the operator by 30%;

[0278] Outstanding clinical application value:

[0279] High survival rate of fat cells provides high-quality materials for autologous fat transplantation, and follow-up shows that the volume retention rate of the transplantation site is 82% 3 months after transplantation, far exceeding the industry average level (65%).

[0280] In Figure 2 the present application, a liposuction needle sleeve method is provided, comprising the following steps:

[0281] Forming a liposuction space at the liposuction site by using a sleeve assembly;

[0282] Performing liposuction operation in the liposuction space by using a liposuction needle assembly.

[0283] In the above technical solution, by using a sleeve assembly to form a liposuction space at the liposuction site, and using a liposuction needle assembly to perform liposuction operation in the liposuction space, the tissue damage is reduced and the fat cell survival rate and liposuction efficiency are improved.

[0284] Those skilled in the art will understand that the application can be implemented as a system, method or computer program product.

[0285] Therefore, the present disclosure can be embodied in the form of a hardware completely, a software completely (including firmware, resident software, microcode, etc.), or a combination of hardware and software, which is generally referred to as "circuitry", "module" or "system". In addition, in some embodiments, the present disclosure can also be embodied in the form of a computer program product in one or more computer readable media having computer readable program codes.

[0286] Any combination of one or more computer readable medium can be employed. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the above. More specific examples (a non-exhaustive list) of the computer readable storage medium include: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0287] Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above-described embodiments are exemplary, and should not be construed as limiting the present disclosure, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present disclosure. On this basis, various replacements and improvements can be made to the present disclosure, and these all fall within the protection scope of the present disclosure.

Claims

1. A liposuction cannula system, characterized in that, include: Cannula assembly, used to create a liposuction space at the liposuction site; The liposuction needle assembly is slidably inserted into the cannula assembly and used to perform liposuction operations within the liposuction space; The cannula assembly integrates a cooling channel to maintain a low-temperature environment at the liposuction site through circulating coolant, thereby improving the survival rate of extracted fat cells and reducing the absorption rate after fat transplantation.

2. The liposuction cannula system according to claim 1, characterized in that, Also includes: Support components, among which, The support assembly is used to install the cannula assembly and the liposuction needle assembly.

3. The liposuction cannula system according to claim 2, characterized in that, The liposuction needle assembly includes a liposuction needle, wherein... The liposuction cannula is used to perform liposuction within the liposuction space.

4. The liposuction cannula system according to claim 3, characterized in that, The outer surface of the liposuction needle is coated with DLC (diamond-like carbon).

5. The liposuction cannula system according to claim 4, characterized in that, The liposuction needle has a micropore array on its sidewall.

6. The liposuction cannula system according to claim 5, characterized in that, The liposuction needle is made of titanium alloy.

7. The liposuction cannula system according to claim 6, characterized in that, The sleeve assembly includes a sleeve, wherein... The cannula is used to create a liposuction space at the liposuction site; the cannula is fitted together with the liposuction needle.

8. The liposuction cannula system according to claim 7, characterized in that, The side wall of the sleeve is provided with a through groove that is opened along the axial direction of the sleeve, wherein, The through grooves are symmetrically arranged on the outer wall of the sleeve.

9. The liposuction cannula system according to claim 2, characterized in that, The support assembly includes a housing, wherein, One end of the cannula is fixedly connected to the housing; the liposuction needle is slidably connected to the housing via a linear bearing.

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