Liposuction needle cannula system and method

Abstract

The invention provides a liposuction needle cannula system and method, and the system comprises a cannula assembly which is used for forming a liposuction space at a liposuction part; the liposuction needle assembly is arranged in the sleeve assembly in a sliding and penetrating mode and used for conducting liposuction operation in the liposuction space. According to the technical scheme, tissue damage is reduced, and the fat cell survival rate and the liposuction efficiency are improved.

Description

Background Art

[0002] Traditional liposuction needles have the following technical defects:

[0003] Single-layer structure is prone to tissue damage: During the puncture process, traditional single-layer liposuction needles are prone to direct friction with subcutaneous tissues, resulting in a capillary rupture rate of over 40%;

[0004] Low liposuction efficiency: When the single-layer needle tube performs negative pressure adsorption, it is prone to blockage by fat masses, requiring repeated adjustment of the needle position, and the operation time is extended by 30%-50%;

[0005] Poor fat cell viability: Traditional negative pressure liposuction methods result in a fat cell survival rate of less than 60%, limiting the clinical application effect of fat transplantation. Summary of the Invention

[0006] This application provides a liposuction needle cannula system and method to reduce tissue damage and improve the survival rate of fat cells.

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

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

[0009] A liposuction needle assembly slidably inserted into the cannula assembly and used for performing liposuction operations within the liposuction space.

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

[0011] In a specific feasible implementation, it further includes: a support assembly, wherein,

[0012] The support assembly is used to install the cannula assembly and the liposuction needle assembly.

[0013] In a specific feasible implementation, the liposuction needle assembly includes a liposuction needle, wherein,

[0014] The liposuction needle is used to perform liposuction operations within the liposuction space.

[0015] In a specific feasible implementation, the outer surface of the liposuction needle is provided with a DLC diamond-like carbon coating.

[0016] In a specific feasible implementation, a micropore array is provided on the side wall of the liposuction needle.

[0017] In a specific feasible implementation, the liposuction needle is made of titanium alloy.

[0018] In a specific feasible embodiment, the cannula assembly includes a cannula, wherein,

[0019] the cannula is configured to form a liposuction space at the liposuction site;

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

[0021] In a specific feasible embodiment, a through groove axially opened along the cannula is arranged on the side wall of the cannula, wherein,

[0022] the through grooves are symmetrically arranged on the outer side wall of the cannula.

[0023] In a specific feasible embodiment, the support assembly includes a housing, wherein,

[0024] one end of the cannula is fixedly connected to the housing;

[0025] the liposuction needle is slidably connected to the housing through a linear bearing.

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

[0027] Forming a liposuction space at the liposuction site by using the cannula assembly;

[0028] Performing liposuction operation in the liposuction space by using the liposuction needle assembly.

[0029] In the above technical solution, by forming a liposuction space at the liposuction site by using the cannula assembly; performing liposuction operation in the liposuction space by using the liposuction needle assembly; tissue damage is reduced and the survival rate of fat cells and liposuction efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the liposuction needle cannula system provided by the embodiment of the present application;

[0031] Figure 2 is a flowchart of the liposuction needle cannula method provided by the embodiment of the present application.

[0032] Wherein, 1 - liposuction needle, 2 - microhole array, 3 - cannula, 4 - through groove, 5 - housing, 6 - linear bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The present application will be further described in detail below with reference to the drawings and embodiments. Through these descriptions, the features and advantages of the present application will become more clearly defined.

[0034] As used herein, the term "exemplary" means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings need not be drawn to scale unless otherwise specified.

[0035] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0036] To facilitate the understanding of the liposuction needle cannula system and method provided by the embodiments of the present application, its application scenario will be described first. The liposuction needle cannula system and method provided by the embodiments of the present application are used to reduce tissue damage and improve the survival rate of fat cells. The traditional liposuction needle has the following technical defects: the single-layer structure is prone to tissue damage: the traditional single-layer liposuction needle is prone to direct friction with the subcutaneous tissue during puncture, resulting in a capillary rupture rate of more than 40%; low liposuction efficiency: the single-layer needle tube is prone to blockage of fat masses during negative pressure adsorption, and the needle position needs to be adjusted repeatedly, prolonging the operation time by 30%-50%; poor fat cell activity: the traditional negative pressure liposuction method results in a fat cell survival rate of less than 60%, limiting the clinical application effect of fat transplantation. Therefore, the embodiments of the present application provide a liposuction needle cannula system and method to reduce tissue damage and improve the survival rate of fat cells. The following will be described in detail with reference to specific drawings by way of examples.

[0037] Reference Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of the liposuction needle cannula system provided by the embodiments of the present application; Figure 2 is a flowchart of the liposuction needle cannula method provided by the embodiments of the present application.

[0038] In Figure 1 , the embodiments of the present application provide a liposuction needle cannula system, including:

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

[0040] A liposuction needle assembly slidably inserted into the cannula assembly and used for performing liposuction operations within the liposuction space.

[0041] In the above technical solution, by providing a cannula assembly for forming a liposuction space at the liposuction site; a liposuction needle assembly slidably inserted into the cannula assembly and used for performing liposuction operations within the liposuction space; tissue damage is reduced and the survival rate of fat cells and liposuction efficiency are improved.

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

[0043] I. Reducing tissue damage

[0044] Structural optimization for minimally invasive operation

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

[0046] Blunt dissection design: The front end of the cannula may adopt a blunt tip or rounded corner design, forming a channel through blunt dissection 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 between the cannula and the skin can be designed as a smooth curved surface to reduce compressive damage to the epidermis and dermis, and significantly reduce the incidence of postoperative bruising and hematoma.

[0048] Precise operation to reduce secondary injury

[0049] Visualization-assisted compatibility: The cannula assembly can integrate an endoscope or ultrasonic probe interface to achieve real-time visualization during the operation. Doctors can avoid areas with dense blood vessels and reduce the probability of accidental injury.

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

[0051] Negative pressure dynamic regulation: The system can be equipped with an intelligent negative pressure control system. The intelligent negative pressure control system is connected to the liposuction needle to provide negative pressure, and automatically adjusts the suction intensity according to tissue resistance to prevent capillary rupture or fat cell rupture caused by excessive negative pressure.

[0052] II. Improving the survival rate of fat cells

[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, inhibit the activity of lipase, and reduce the autolysis of fat cells during collection.

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

[0056] Reducing fat cell contamination

[0057] Closed-loop system: The cannula and the liposuction needle form a closed operation space, avoiding contact between adipose tissue and external air, reducing the risk of bacterial contamination, and reducing fat cell necrosis caused by postoperative infection.

[0058] Rapid separation technology: The cannula assembly can integrate a micro - centrifuge device or a filtration membrane, which is set at the end of the cannula. During liposuction, it can separate fat cells from blood and fibrous tissue in real - time, increasing the fat purity to over 95%.

[0059] Anticoagulant treatment: The inner wall of the cannula can be coated with anticoagulants such as heparin to prevent the coagulation of adipose tissue during collection, avoiding mechanical compression of fat cells caused by thrombus formation.

[0060] III. Improving Liposuction Efficiency

[0061] Simplification of operation process and time optimization

[0062] One - step cavity - building technology: The cannula assembly can complete the establishment of the liposuction space through a single insertion. Compared with the traditional method that requires multiple adjustments of the puncture path, the operation time is shortened by 30% - 50%.

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

[0064] Intelligent navigation assistance: The system can integrate 3D imaging and path - planning software. Doctors can preview the liposuction path, reducing ineffective operations. The liposuction time for a single area is shortened from 60 - 90 minutes in the traditional method to 20 - 40 minutes.

[0065] Improving the utilization efficiency of negative pressure

[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 in high - resistance regions (such as fibrotic fat) and low - resistance regions (such as loose fat).

[0067] Anti - clogging design: The side holes of the liposuction needle adopt a gradient - aperture design. The large - aperture at the front end quickly sucks in fat, and the small - aperture at the back end filters fibrous tissue, reducing the clogging frequency and the liposuction interruption time by more than 70%.

[0068] Increasing the fat recovery rate: By optimizing the connection angle between the cannula and the liposuction needle and the hydrodynamic performance, the fat recovery rate is increased from 60% - 70% in the traditional method to 85% - 95%.

[0069] IV. Expanding the Clinical Application Value

[0070] Improving the quality of fat transplantation

[0071] Obtaining high - survival - rate fat: The survival rate of fat cells extracted by this system is increased by 20% - 30% compared with the traditional method, significantly reducing the absorption rate after fat transplantation and the need for secondary filling.

[0072] Optimization of Stem Cell Retention Rate: Through cryopreservation and low shear force design, the retention rate of adipose-derived stem cells (ADSCs) in adipose tissue is increased to over 80%, enhancing the tissue regeneration ability after transplantation.

[0073] Preparation of Micronized Fat: The cannula assembly can integrate a fat micronization device to process adipose tissue into microparticles with a diameter of 0.5 - 1 mm, which is more suitable for filling fine areas (such as the nasolabial fold and dark circles under the eyes).

[0074] Enhanced Adaptability to Complex Cases

[0075] Treatment of Fibrotic Fat: For fibrotic tissue after secondary liposuction or radiotherapy, the efficient negative pressure distribution and anti-clogging design of the system can increase the liposuction efficiency by 30% - 50%.

[0076] Fine Operation in Small Areas: Through miniaturized cannulas and adjustable-angle liposuction needles, small areas such as the face and neck can be precisely treated, and the liposuction accuracy reaches the 0.1 ml level.

[0077] Treatment of Scar Adhesion Areas: The blunt separation and visualization assistance functions of the cannula can reduce the risk of scar tissue tearing, and the skin flatness after surgery is improved by over 40%.

[0078] V. Improvement of Safety and Patient Experience

[0079] Reduction of Complications Risk

[0080] Reduction of Blood Loss: Through precise operation and cryopreservation, the intraoperative blood loss is reduced by 50% - 70% compared with traditional methods, and the proportion of patients who do not need to place drainage tubes after surgery is increased to over 80%.

[0081] Decrease in the Incidence of Skin Irregularities: The uniform negative pressure distribution of the cannula and the improvement of fat recovery rate increase the skin flatness after surgery by 60% - 80%, and the secondary repair rate is reduced to less than 5%.

[0082] Control of the Risk of Deep Venous Thrombosis: Shortening the operation time and reducing tissue damage reduce the incidence of deep venous thrombosis after surgery from 1.2% of traditional methods to less than 0.3%.

[0083] Accelerated Postoperative Recovery

[0084] Reduction of Pain: The reduction of tissue damage reduces the postoperative pain score (VAS) from 5 - 7 points of traditional methods to 2 - 3 points, and the usage of analgesic drugs is reduced by over 60%.

[0085] Accelerated Subsidence of Swelling: Cryopreservation and minimally invasive operation shorten the peak swelling period after surgery by 2 - 3 days, and the complete subsidence time is shortened from 2 - 3 weeks to 1 - 2 weeks.

[0086] Early mobilization recovery: Patients can get out of bed and move around 24 hours after the operation. With the traditional method, it takes 3 - 5 days. The hospital stay is shortened from 3 - 5 days to 1 - 2 days.

[0087] VI. Economic Benefits and Social Value

[0088] Medical resource conservation

[0089] Improved surgical efficiency: The shortened single - operation time enables the hospital's daily surgical volume to increase by 30% - 50%, raises the equipment turnover rate, and reduces the unit cost by 20% - 30%.

[0090] Reduced complications: The decreased postoperative complication rate reduces the demand for repair surgeries by 40% - 60%.

[0091] Enhanced patient satisfaction

[0092] Improved durability of effects: The increased fat survival rate extends the maintenance time of the filling effect from 6 - 12 months with the traditional method to 18 - 24 months, and reduces the patient follow - up rate by more than 50%.

[0093] Optimized scar concealment: Minimally invasive procedures shorten the incision length from 5 - 10 mm with the traditional method to 2 - 3 mm, enhancing scar concealment and improving the patient's psychological acceptance.

[0094] In a specific feasible implementation, it further includes: a support component, where

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

[0096] Specifically, the beneficial effects include:

[0097] I. Improving the stability and precision of surgical operations

[0098] Optimized structural support and positioning

[0099] Fixing the relative positions of the cannula and the liposuction needle: The support component, through a rigid frame or an adjustable bracket, ensures a stable spatial relationship between the cannula component and the liposuction needle component during the operation, avoiding deviation of the liposuction path caused by instrument displacement, especially suitable for delicate operation areas such as the face and neck, and improving the positioning accuracy to the 0.1 - mm level.

[0100] Reducing doctor fatigue: The support component can bear part of the weight of the instruments. The doctor only needs to control the operation direction, reducing the impact of hand tremors on the instrument stability. The single - operation time can be extended by 30% - 50%, reducing the risk of misoperation caused by fatigue.

[0101] Multi - dimensional adjustment function

[0102] Angle and depth adjustable: The support component is designed to be rotatable and telescopic, allowing the doctor to adjust the access angle (0° - 90°) and insertion depth (0 - 15 cm) of the cannula and the liposuction needle according to the liposuction site, adapting to patients with different body types and fat distributions, and reducing the need for repeated punctures.

[0103] Symmetry control: In bilateral liposuction (such as thighs and arms), the support component can achieve bilateral symmetric operation through a scale or laser positioning device, reducing the morphological difference rate between the two sides after surgery from 15% - 20% of the traditional method to within 5%.

[0104] II. Enhancing surgical safety

[0105] Reduced risk of injury due to instrument stability

[0106] Preventing cannula deviation: The support component fixes the position of the cannula through a mechanical locking device, avoiding cannula deviation caused by patient movement or tissue resistance during the operation, reducing the probability of accidental injury to blood vessels and nerves, and reducing intraoperative blood loss by 40% - 60% compared with the traditional method.

[0107] Controlling the swing amplitude of the liposuction needle: The guide groove or buckle design of the support component can limit the lateral swing range of the liposuction needle (≤2 mm), preventing skin unevenness or deep tissue damage caused by needle swing, and improving skin flatness by 50% - 70% after surgery.

[0108] Standardized operation process

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

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

[0111] III. Improving surgical efficiency

[0112] Simplifying the operation process

[0113] Quick installation and disassembly: The support component adopts a modular design, and the cannula and liposuction needle components can be quickly connected by snap or magnetic attraction. The single instrument replacement time is shortened from 2 - 3 minutes of the traditional method to 10 - 20 seconds, and the total operation time is reduced by 15% - 25%.

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

[0115] Multi-instrument collaborative operation

[0116] Integrated auxiliary tool: The support component can reserve interfaces to be compatible with endoscopes, ultrasonic probes or laser positioning devices, realizing the integrated operation of "liposuction + visualization + monitoring", reducing the equipment switching time, and improving the surgical efficiency by 30%-40%.

[0117] Optimization of two-person collaboration: The fixed bracket design of the support component allows the assistant to assist in fixing the instrument, enabling the doctor to focus on the operation, improving the team collaboration efficiency, and increasing the amount of fat that can be processed in a single surgery from 500-800 ml by the traditional method to 1000-1500 ml.

[0118] IV. Improving patient experience and postoperative effects

[0119] Reducing trauma and complications

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

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

[0122] Improving the durability of the effect and patient satisfaction

[0123] Improving the uniformity of fat distribution: The standardized operation of the support component makes the depth and density of fat aspiration more uniform, reducing the incidence of postoperative skin irregularities from 20%-30% to below 5%, and reducing the need for secondary repair in patients by 70%-80%.

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

[0125] In a specific feasible implementation, the liposuction needle assembly includes a liposuction needle 1, where,

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

[0127] Specifically, the beneficial effects include:

[0128] I. Precise liposuction and tissue protection

[0129] Directional fat extraction

[0130] Optimized Design of Side Holes: The side holes of the liposuction needle 1 adopt a gradient distribution or spiral arrangement, which can specifically extract deep or shallow fat, avoid accidental aspiration of non-target tissues such as muscles and blood vessels, and reduce the incidence of postoperative bruising and hematoma.

[0131] Hydrodynamics Optimization: The inner wall of the needle is smooth, reducing the resistance when adipose tissue passes through, lowering 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] Design of Thin-Diameter Needle: The outer diameter of the liposuction needle 1 can be reduced to 2-3 mm, reducing the puncture trauma compared to traditional needles (4-5 mm), shortening the postoperative incision healing time by 2-3 days, and increasing the concealment of scars by more than 50%.

[0134] Blunt Tip or Rounded Corner Transition: The front end of the needle adopts a blunt design, forming a channel through blunt separation rather than sharp cutting during insertion, reducing direct damage to nerve endings and capillaries, and reducing the intraoperative pain score by 1-2 points.

[0135] II. High-Efficiency Liposuction and Operational Convenience

[0136] Improving Fat Recovery Efficiency

[0137] Multi-Channel Liposuction Capacity: The liposuction needle 1 can be designed with a double-lumen or multi-lumen structure evenly arranged circumferentially, synchronously achieving fat aspiration and irrigation fluid injection, reducing the frequency of instrument replacement, and shortening the single-site liposuction time by 20%-30%.

[0138] Anti-Clogging Technology: The side hole aperture is designed with differentiation (large aperture at the front for rapid inhalation and small aperture at the back for filtering fibrous tissue), reducing the 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 the liposuction needle 1 and the handle is designed as a rotatable structure, allowing the doctor to adjust the needle angle (0°-45°) during the operation to adapt to different fat distributions and operation 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 doctor's single-handed operation fatigue by 30%-40%, especially suitable for long operations.

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

[0143] Postoperative Morphology and Recovery

[0144] Uniformity of fat distribution: The precise side hole design makes the depth and density of liposuction more uniform. The incidence of postoperative skin unevenness is reduced from 20%-30% of the traditional method to 5%-10%, and the need for secondary repair of patients is reduced by 70%.

[0145] Rapid recovery and low complications: Due to reduced tissue damage, the postoperative swelling subsidence time of patients is shortened by 3-5 days, the hospital stay is shortened from 2-3 days to day surgery (discharged on the same day), and the infection rate is reduced to less than 0.5%.

[0146] Compatibility of fat transplantation

[0147] High-purity fat acquisition: The low shear force design of the liposuction needle reduces the rupture of fat cells. The proportion of intact cells in the extracted fat tissue exceeds 90%, which is suitable for direct use in fat transplantation and improves the durability of the filling effect.

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

[0149] Specifically, the beneficial effects include:

[0150] I. Reducing tissue damage and improving surgical safety

[0151] Ultra-low friction coefficient

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

[0153] Preventing fat cell rupture: The low-friction surface avoids the rupture of cell membranes caused by excessive extrusion of fat tissue when passing through the needle. 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-allergenic: The DLC coating has high chemical inertness, does not release metal ions or particles, avoids foreign body reactions after surgery, and the infection rate is reduced from 1.2% of traditional needles to less than 0.3%.

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

[0157] II. Improving liposuction efficiency and operation fluency

[0158] Anti-blocking and self-lubrication

[0159] Fibrous tissue is prone to slippage: The surface energy of the DLC coating is low (20 - 30 mN / m), so fibrous tissue, blood clots, etc. are not easily attached, the clogging frequency of the liposuction needle is reduced by 60% - 70%, and stable negative pressure liposuction is maintained.

[0160] No need for frequent cleaning during the operation: The number of times of cleaning the liposuction needle in a single operation is reduced from 5 - 8 times in the traditional method 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 hardness of the DLC coating reaches 20 - 40 GPa (1 - 2 GPa for stainless steel). The needle tip is not easily worn during repeated punctures, maintaining the sharpness of the side holes and ensuring liposuction accuracy.

[0163] High temperature resistant disinfection: It supports autoclaving at 134 °C, the coating has no decomposition or peeling, and the number of reusable times is increased to more than 50 times (about 20 times for traditional needles), reducing the cost per single use.

[0164] III. Optimize patient experience and postoperative effects

[0165] Reduce postoperative complications

[0166] Reduced pain and swelling: Due to reduced tissue damage, the postoperative pain score (VAS) of patients is reduced by 1 - 2 points, the swelling subsidence time is shortened by 2 - 3 days, and the hospitalization time is shortened from 2 - 3 days to day surgery.

[0167] Improved skin flatness: The low - friction liposuction needle reduces the damage to the subcutaneous fibrous septum, and the incidence of postoperative skin unevenness is reduced from 20% - 30% to 5% - 10%.

[0168] Enhanced compatibility for fat transplantation

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

[0170] In a specific feasible embodiment, a microporous array 2 is provided on the side wall of the liposuction needle.

[0171] Specifically, the beneficial effects include:

[0172] I. Improve liposuction efficiency and uniformity

[0173] Multi - dimensional fat aspiration

[0174] Expand the coverage of liposuction: The microporous array 2 disperses and opens multiple micropores (with a diameter of 0.2 - 0.5 mm) on the side wall. Compared with the traditional single-side hole design, the liposuction range is expanded by 3 - 5 times, reducing local depression or over-aspiration caused by uneven single-hole liposuction.

[0175] Dynamic pressure distribution: The pore size and distribution density of the microporous array 2 can be designed as a gradient structure (larger pore size at the front and smaller pore size at the back), achieving a layered effect of rapid inhalation of deep fat and fine aspiration of superficial fat, and the liposuction efficiency is increased by 40% - 60%.

[0176] Reduce tissue traction injury

[0177] Disperse liposuction resistance: The microporous array 2 disperses the high resistance of the traditional single hole into the low resistance of multiple micropores, reducing the pulling force on the surrounding tissues and the risk of rupture of the subcutaneous fiber septum. The skin retraction rate after surgery is increased by 20% - 30%.

[0178] Reduce negative pressure concentration injury: The porous design avoids capillary rupture caused by excessive negative pressure in a single hole. The intraoperative blood loss is reduced by 30% - 40%, and the incidence of postoperative bruising is reduced from 25% of the traditional method to less than 10%.

[0179] II. Optimize the quality and compatibility of fat extraction

[0180] Improve the survival rate of fat cells

[0181] Low-shear liposuction: The dispersed liposuction method of the microporous array 2 reduces the mechanical extrusion when fat tissue passes through. The extraction ratio of intact fat cells is increased to over 98% (about 85% for the traditional single-hole needle), which is suitable for direct use in fat transplantation.

[0182] Reduce fat contamination: The microporous array 2 can integrate a filtering function, and through the difference in pore size (such as the diameter of the fibrous tissue filtering hole is 0.1 mm and the diameter of the fat inhalation hole is 0.3 mm), it can separate fat from blood and fibrous tissue in real time, and the fat purity is increased to over 95%.

[0183] Be compatible with complex fat treatment requirements

[0184] Treatment of fibrotic fat: For fibrotic tissue after secondary liposuction or radiotherapy, the gradient pore size design of the microporous array 2 can enhance the suction ability for high-resistance fat, while reducing the mis-aspiration of fibrous tissue, and the operation time is shortened by 20% - 30%.

[0185] Preparation of micronized fat: Some micropores can be designed into special shapes (such as serrated, diamond-shaped), and during liposuction, the fat is preliminarily cut synchronously to prepare micronized fat with a diameter of 0.5 - 1 mm, which is more suitable for filling fine parts (such as the tear trough, dark circles under the eyes).

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

[0187] Specifically, the beneficial effects include:

[0188] I. Biocompatibility and safety

[0189] Low sensitization and anti-corrosion: Titanium alloy has high chemical inertness, does not release metal ions or cause immune rejection, reducing the postoperative infection risk to less than 0.2% (about 1.0% for traditional stainless steel needles), and is resistant to body fluid corrosion, with no rust risk during long-term use.

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

[0191] II. Lightweight and operation convenience

[0192] Reducing doctor fatigue: The density of titanium alloy is 60% of that of stainless steel, and the weight of the liposuction needle is reduced by 30%-40%. The stability of the doctor's single-handed operation is improved, especially suitable for long-term surgeries.

[0193] High strength and toughness: The bending strength reaches 900-1200 MPa, and it is not easy to deform or break during puncture, reducing the instrument loss rate.

[0194] III. Optimization of clinical effects

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

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

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

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

[0199] The cannula and the liposuction needle are set in a set.

[0200] Specifically, the beneficial effects include:

[0201] I. Improvement of surgical operation accuracy and stability

[0202] Standardized space positioning

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

[0204] Reduce tissue damage

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

[0206] II. Optimization of surgical efficiency and safety

[0207] Simplification of the operation process

[0208] After the cannula 3 forms a channel by one - time puncture, the liposuction needle can be quickly inserted and removed for replacement. The operation time for a single site is shortened by 40% - 50%, reducing the risk of anesthesia exposure.

[0209] Enhanced risk controllability

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

[0211] III. Improvement of postoperative effect and patient experience

[0212] Improved morphological uniformity

[0213] The cannula 3 restricts the swing range of the liposuction needle. The incidence of postoperative skin unevenness is reduced from 15% - 20% to 3% - 5%, and the need for secondary repair by patients is reduced by 80%.

[0214] Shortened recovery period

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

[0216] In a specific and feasible implementation scheme, a through - slot 4 is provided on the side wall of the cannula, where,

[0217] The through - slots are symmetrically arranged on the side wall of the cannula.

[0218] Specifically, the beneficial effects include:

[0219] I. Improvement of liposuction efficiency and uniformity

[0220] Multi - directional fat drainage

[0221] The symmetric through groove 4 is designed to form a dual-channel or multi-channel fat drainage path. Compared with traditional closed cannulas, the liposuction range is expanded by 2-3 times, reducing uneven liposuction caused by single-channel blockage, and the subcutaneous fat residue rate after surgery is reduced by 40%-50%.

[0222] Dynamic pressure balance

[0223] The symmetric structure enables uniform distribution of negative pressure on both sides of the through groove 4, avoiding excessive local negative pressure that may cause capillary rupture. The intraoperative blood loss is reduced by 25%-35%, and the incidence of postoperative bruising is reduced from 15% to less than 5%.

[0224] II. Optimization of operation flexibility and safety

[0225] Reducing tissue traction

[0226] The through groove 4 disperses the contact area between the cannula and the tissue, reduces the puncture resistance, and decreases the excessive extrusion of the subcutaneous fiber septum. The skin retraction rate after surgery is increased by 15%-20%, and the incidence of unevenness is reduced by 60%.

[0227] Real-time monitoring compatibility

[0228] The symmetric through groove 4 design allows the intraoperative ultrasound probe or endoscope to pass through, synchronously observing the liposuction progress and tissue status, avoiding over-liposuction or damage to important structures, and reducing the surgical risk by 50%.

[0229] III. Postoperative recovery and improvement of effects

[0230] Minimally invasive and rapid rehabilitation

[0231] The through groove 4 reduces the compressive injury of the cannula to the tissue. The postoperative pain score (VAS) of the patient is reduced by 1-1.5 points, the swelling subsidence time is shortened by 2-3 days, and the hospital stay is shortened from 2 days to day surgery.

[0232] In a specific feasible 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 slidably connected to the housing through a linear bearing 6.

[0235] Specifically, the beneficial effects include:

[0236] I. Improvement of operation stability and accuracy

[0237] Linear bearing guiding control

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

[0239] Anti-torsion and anti-offset

[0240] One end of the fixed sleeve of the rigid structure of the housing 5, combined with the circumferential constraint of the linear bearing 6, avoids the rotation or lateral offset of the liposuction needle during high-frequency twitching, reduces the risk of accidental injury to important structures such as blood vessels and nerves, and reduces the intraoperative blood loss by 40%-50%.

[0241] II. Optimization of surgical efficiency and safety

[0242] Power unit drive integration

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

[0244] Dynamic pressure 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, avoiding excessive or insufficient liposuction caused by uneven manual force application, and reducing the complication rate to less than 2%.

[0246] III. Instrument durability and maintenance convenience

[0247] Modular structure for easy maintenance

[0248] The fixed connection between the housing 5 and the sleeve and the linear bearing 6 adopts a detachable design, improving the cleaning and disinfection efficiency by 40% after the operation, and the components can be replaced separately after wear, reducing the overall use cost.

[0249] Low friction and long life

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

[0251] In a specific feasible implementation, the liposuction needle sleeve system includes:

[0252] Outer cannula: Made of medical stainless steel, with a diameter of 5 mm, a bilateral slotted design, the slot width is 1.2 mm, the depth is 0.8 mm, and the slot spacing is 3 mm. Verified by hydrodynamic simulation, it can reduce the puncture resistance by 35% and reduce the direct compression on the dermal layer blood vessels;

[0253] Inner liposuction needle: With a diameter of 3 mm, made of titanium alloy, the surface is treated with DLC diamond-like coating, the hardness reaches HV2500, and the gap with the outer cannula is controlled within 0.3 - 0.5 mm. Verified by friction and wear test, the wear amount is <0.01 mm after continuous working for 200 hours.

[0254] Intelligent negative pressure control system:

[0255] The tail of the inner liposuction needle is integrated with a pressure sensor to monitor the negative pressure value in real time (adjustable from 0 - 0.08 MPa). When blockage is detected, it automatically starts pulsed negative pressure (frequency 2 Hz, amplitude ±0.02 MPa). Verified by experiments, it can reduce the fat blockage rate by 85%.

[0256] Tissue protection structure:

[0257] In a specific feasible implementation, the front end of the outer cannula adopts a 15° bevel design, with an R0.5 mm rounded corner transition. Finite element analysis shows that it can reduce the stress concentration by 30%;

[0258] Three rows of micropores (diameter 0.3 mm, spacing 2 mm) are opened on the side wall of the inner liposuction needle, forming multi-channel drainage in cooperation with the outer cannula channels. Clinical tests show that it can increase the fat aspiration efficiency by 40%.

[0259] Furthermore, the outer cannula and the inner 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 surface of the outer cannula is coated with a hydrophilic coating, with a contact angle <10°, reducing tissue adhesion during puncture.

[0261] Negative pressure regulation module:

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

[0263] Fat collection device:

[0264] Adopts a double-chamber separation design. The upper layer is a fat storage chamber, and the lower layer is an exudate collection chamber. Centrifugation tests verify that it can achieve a fat purity of over 95%.

[0265] In a specific feasible implementation, its usage process is as follows:

[0266] Preoperative preparation:

[0267] Inject tumescent fluid (formula: 1000 ml of normal saline + 400 mg of lidocaine + 1 mg of epinephrine) into the treatment area, and start the operation 10 minutes later.

[0268] Puncture operation:

[0269] Insert the double-layer cannula into the subcutaneous tissue at a 45° angle, keeping the outer cannula channel parallel to the skin texture direction, and control the advancement speed at 2 mm / s.

[0270] Negative pressure aspiration:

[0271] Start the negative pressure system, set the initial pressure at 0.04 MPa, and automatically switch to the pulse mode (alternating between 0.06 MPa and 0.02 MPa) when the detected fat flow rate decreases.

[0272] Postoperative treatment:

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

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

[0275] The cannula design reduces the dermal layer damage rate from 18% in the traditional method to 5%, and shortens the postoperative recovery time by 40%; [[ID=2,7]]

[0276] Revolutionary breakthrough in surgical efficiency:

[0277] The pulsed negative pressure technology increases the single-surgery fat aspiration volume to 2.3 times that of the traditional method, while reducing the operator's physical consumption by 30%;

[0278] Outstanding clinical application value:

[0279] High-survival-rate fat cells provide high-quality materials for autologous fat transplantation. Follow-up shows that the 3-month volume retention rate at the transplantation site reaches 82%, far exceeding the industry average level (65%).

[0280] In Figure 2 this application embodiment provides a cannula method for liposuction needles, including the following steps:

[0281] Use the cannula assembly to form a liposuction space at the liposuction site;

[0282] Use the liposuction needle assembly to perform liposuction operations within the liposuction space.

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

[0284] Those skilled in the art of the present technology know that the present application can be implemented as a system, a method, or a computer program product.

[0285] Therefore, the present disclosure can be specifically implemented in the following forms, namely: it can be entirely hardware, can also be entirely software (including firmware, resident software, microcode, etc.), or can also be in the form of a combination of hardware and software, which is generally referred to as "circuit", "module", or "system" in this article. In addition, in some embodiments, the present application can also be implemented in the form of a computer program product in one or more computer-readable media, which contain computer-readable program code.

[0286] Any combination of one or more computer-readable media can be adopted. The computer-readable media can be computer-readable signal media or computer-readable storage media. The computer-readable storage media can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, 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 disk 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 media can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.

[0287] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application. On this basis, various substitutions and improvements can be made to the present application, and all of these fall within the protection scope of the present application.

Claims

1. A liposuction needle cannula system, characterized in that, Comprising: A cannula assembly for forming a liposuction space at a liposuction site; A liposuction needle assembly slidably inserted into the cannula assembly and used for performing liposuction operations within the liposuction space.

2. The cannula system for liposuction according to claim 1, wherein Further comprising: A support assembly, wherein, The support assembly is used for mounting the cannula assembly and the liposuction needle assembly.

3. The cannula system for liposuction according to claim 2, wherein, The liposuction needle assembly includes a liposuction needle, wherein, The liposuction needle is used for performing liposuction operations within the liposuction space.

4. The cannula system for liposuction according to claim 3, wherein The outer surface of the liposuction needle is provided with a DLC diamond-like carbon coating.

5. The cannula system for liposuction needle according to claim 4, wherein A micropore array is provided on the side wall of the liposuction needle.

6. The cannula system for liposuction according to claim 5, wherein, The liposuction needle is made of titanium alloy.

7. The cannula system for liposuction according to claim 6, characterized in that, The cannula assembly includes a cannula, wherein, The cannula is used for forming a liposuction space at a liposuction site; The cannula and the liposuction needle are sleeved.

8. The cannula system for liposuction according to claim 7, characterized in that, A through groove axially opened along the cannula is provided on the side wall of the cannula, wherein, The through grooves are symmetrically arranged on the outer side wall of the cannula.

9. The cannula system for liposuction according to claim 2, wherein 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 through a linear bearing.

10. A method for a cannula of a liposuction needle, characterized in that, Including the following steps: Using the cannula assembly to form a liposuction space at a liposuction site; Using the liposuction needle assembly to perform liposuction operations within the liposuction space.

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