119 results about "Skin flap" patented technology

The device comprises a pre-stretching elastic film layer which is sequentially stacked, a gradient drainage layer is arranged below the pre-stretching elastic film layer, and sealing edges are arranged on the outer edges of the pre-stretching elastic film layer and the gradient drainage layer. The sealing edge surrounds the edges of the pre-stretching elastic film layer and the gradient drainage layer and is used for being bonded with the skin to form a closed cavity. Continuous negative pressure is provided through retraction force of the pre-stretched elastic thin film layer, compared with a traditional external pump, the cost is lower, use is more convenient, adhesion with a postoperative wound part is prevented through the arrangement of the anti-adhesion contact layer, and the postoperative wound part is prevented from being damaged. And meanwhile, the anti-adhesion contact layer is provided with a micron-sized bulge array and nano-sized surface textures, so that the anti-adhesion effect is further ensured, and the drainage efficiency is improved through the design of the gradient drainage layer.

The invention relates to the technical field of medical information processing, in particular to a wound condition ultrasonic assessment method for free flap transplantation, which comprises the following steps: performing block processing on an acquired ultrasonic gray image to obtain each enhancement analysis candidate block, the block processing being beneficial to improving the contrast ratio of a fat area and an edema area; a plurality of enhanced analysis target blocks are screened through fat feature screening parameters, so that the image data analysis amount is reduced to a certain extent, and the wound condition ultrasonic evaluation efficiency is improved; a blood vessel ultrasonic frequency shift feature value and a fat echo factor are combined to determine a fat feature first evaluation value of an enhanced analysis target block, and then a fat feature second evaluation value of each gray level is determined, so that enhancement of fat discrimination under the condition that a probe is in poor contact with wound skin is facilitated; and an enhanced ultrasonic grayscale image which has a better enhancement effect and is used for ultrasonic evaluation of wound injury conditions is obtained.

The invention provides an intelligent decision-making method and system for free flap riser anastomosis based on hemodynamics. According to the method, firstly, the blood flow direction, the flow speed and the blood vessel wall tension parameter of a target blood vessel are collected, and a dynamic correlation model of intravascular fluid mechanics and external tissue deformation is established; a three-dimensional blood flow pressure gradient map is generated based on the model, then, a system automatically screens an anastomosis path meeting a blood flow resistance threshold value and the endothelial cell survival rate requirement, and the optimal anastomosis pose is determined by analyzing the blood vessel wall elasticity matching degree and the turbulence generation probability. Then, guiding the accurate adjustment of the clamping direction of the blood vessel and the suture needle pitch in the operation, ensuring that the pressure of the lumen of the anastomosed blood vessel is kept balanced when the anastomosed blood vessel is axially stretched, meanwhile, effectively inhibiting local vortex, and remarkably improving the long-term smoothness of the anastomosis of the blood vessel. According to the method, mechanical precise matching and blood flow stable control of free flap vascular anastomosis are achieved, and the postoperative risk is remarkably reduced.

The invention provides a preparation method of a composite artificial flap with a bionic structure and function induction activity. The preparation method comprises the following steps: S1, preparing an epidermis induction layer; s2, preparing a dermis functional remodeling layer; s3, preparation of a vascularization integration substrate layer; and S4, three-layer compounding and sterilization. Through an epidermis-basilar membrane-dermis three-layer integrated structure, a micron-nano multistage gradient pore and basilar membrane belt adhesion structure of natural skin is accurately simulated, and the problems of epidermis-dermis layering and non-uniform cell infiltration of an existing skin flap are solved.

The invention provides a multi-degree-of-freedom double-arm skin flap retraction robot which comprises a multi-source sensing system, driving systems, a supporting frame and at least two skin flap supporting arms, the driving systems are installed on the supporting frame, each skin flap supporting arm is connected with one driving system, and the driving systems are installed on the supporting frame. The driving system drives the skin flap supporting arm to advance, retreat, lift and pitch, and the multi-source sensing system comprises a spatial position and posture sensing unit and a force touch sensing unit. Each skin flap supporting arm is provided with a spatial position and posture sensing unit and a force touch sensing unit which can monitor the configuration change and the stress state of the skin flap supporting arm in real time. The skin flap retractor has the advantages that dynamic supporting and retraction of skin flap tissue can be achieved, it is guaranteed that the surgical field is fully exposed, meanwhile, single-point tissue compression and trauma risks caused by a traditional retractor are reduced, manpower resources are saved, operation safety is guaranteed, and retraction efficiency and stability are improved.

The invention relates to a nickel-titanium alloy stent for limiting brain bulging and flap sinking after skull flap removal and a preparation method of the nickel-titanium alloy stent, and relates to the field of biomedical materials, the stent is of an elastic net-shaped structure which is arranged according to the radian of a missing flap on a bone window and is provided with a plurality of reserved gaps; the stress deformation pressure of the bracket ranges from 103.085 kPa to 103.285 kPa, and the stress deformation pressure of the bracket ranges from 103.085 kPa to The stent comprises a plurality of polygonal grid units which are uniformly distributed, the plurality of polygonal grid units are connected to form a net-shaped structure, and pores in the middles of the polygonal grid units are reserved gaps; and each polygonal grid unit consists of a plurality of S-shaped edge wires which are connected end to end. In a deboning decompression operation, the nickel-titanium alloy stent provided by the invention is placed on a bone window to solve the problems of early-stage brain bulging and later-stage skin flap sinking after a skull flap is removed; the prepared nickel-titanium alloy stent is excellent in mechanical property, high in biological safety and high in clinical adaptability.

The utility model relates to the technical field of medical instruments, in particular to an elastic pull-fit patch for skin wounds, which comprises two elastic patches, a centering structure is arranged between the two elastic patches, and the centering structure comprises a fixing groove frame and two pull-fit belts. The two pulling belts are fixedly connected with the two elastic stickers respectively; by means of the centering structure, when the device is fixed to the wound of a patient, a cotton ball covers the middle of the wound, then a rotating button is rotated, a rotating rod drives a small gear to rotate, due to the fact that the outer surface of the small gear is meshed with gear racks on the two sides, pulling-closing belts on the two sides can slide in a fixing groove frame, and therefore elastic stickers on the two sides are driven to symmetrically cover the two sides of the wound; when the elastic pastes on the two sides reach proper positions, the elastic pastes stop rotating, the covering films on the two sides are torn down, the elastic pastes on the two sides are pasted on the skin of a patient, and therefore the purpose that the pulling pastes can be symmetrically pasted on the two sides of a wound and skin flaps on the two sides can be aligned when the pulling pastes are tensioned is achieved.

The present invention discloses a breast tumor cutter, comprising a gripping sleeve, a rotating structure mounted at the rear end of the gripping sleeve, a grasping and cutting structure disposed within the gripping sleeve, the gripping sleeve comprising a sleeve and a movable sleeve, the rotating structure comprising a sleeve column and a rotating seat, and the grasping and cutting structure comprising a straight rod, a plurality of clamping rods, and a cover. The present invention utilizes the rotating structure and the grasping and cutting structure disposed within the gripping sleeve. After peeling back a breast flap and finding the tumor, the rotating seat can be rotated to cause the head end of the clamping rod to pull the cover, deforming the cover and placing it over the tumor. At this point, the grasping and cutting structure can be rotated to cause the cutting head at the head end of the clamping rod to cut along the edge of the tumor, achieving rapid cutting, a complete cutting surface, and a clear cutting edge.

The utility model discloses a skin flap taking device applied to an oral cavity, relates to the technical field of medical auxiliary tools, and aims to solve the problems that when palate skin flaps are cut, sharp blades are usually adopted for cutting, the sizes are not consistent, the widths are not uniform, the palate skin flaps are easily broken or cut off, appropriate soft tissue flaps cannot be obtained, suturing is not facilitated, and the palate skin flaps cannot be taken out easily. And later tissue healing and keratinized gingival formation are not facilitated. According to the flap taking device applied to the oral cavity, the flap cutting size can be adjusted according to needs, and observation is facilitated. Comprising a first connecting rod and a second connecting rod which are arranged in a crossed mode and rotationally connected, one ends of the first connecting rod and the second connecting rod are provided with a cutting part and a fixing part respectively, the other ends of the first connecting rod and the second connecting rod are provided with adjusting structures, the adjusting structures control the opening degree of the first connecting rod and the second connecting rod, and the cutting part is provided with a blade used for cutting.

The invention discloses a skin flap transplantation post-operation blood supply disorder dynamic monitoring device based on an MEMS capacitive sensor and a using method, the device comprises a fitting layer and a sensor layer, the fitting layer is of a three-layer structure, and stable fitting and biocompatibility of the device and a skin flap area are achieved; the sensor layer comprises a signal monitoring module and a signal transmission module, the signal monitoring module forms an array by a plurality of capacitive sensing units, and skin flap tissue swelling is converted into a capacitance signal with position identification through the MEMS parallel plate capacitance principle; after being processed and converted, the capacitance signal is wirelessly transmitted to external equipment through low-power-consumption Bluetooth. And medical personnel judge the blood supply disorder and the occurrence area after the skin flap operation based on the capacitance signal change trend. The device disclosed by the invention integrates miniaturization and integration, can monitor in real time, reduces manpower consumption, provides data support for early intervention of blood supply disorder, and is suitable for post-operation clinical monitoring of skin flap transplantation.

A flap transplantation constant temperature monitoring device disclosed by the present invention is characterized in that the flap transplantation constant temperature monitoring device comprises a base, a monitoring mechanism and a constant temperature mechanism, a control table and a support are fixedly installed above the base, a humidifier is arranged on one side of the support, and the monitoring mechanism comprises a cover body fixedly installed on one side of the support; a plurality of gooseneck pipes are installed in the cover body, temperature measuring modules are arranged at the bottoms of the gooseneck pipes, and an adjusting groove is formed in the bottom of the cover body; the constant temperature mechanism comprises a first lead screw rotationally installed on one side in the adjusting groove, a sliding rod is fixedly installed on the other side of the adjusting cavity, a sliding rail is slidably installed between the first lead screw and the sliding rod, a second lead screw is rotationally installed in the sliding rail, a second motor is arranged on one side of the sliding rail, and a sliding block is slidably installed in the sliding rail. Heating plates are arranged at the bottoms of the sliding blocks; the skin flap area appearance image automatic acquisition, continuous temperature monitoring and intelligent constant-temperature warm keeping functions can be integrated into a monitoring device.

The application discloses a kind of free skin flap postoperative nursing scheme evaluation and early warning method based on multi-modal monitoring data fusion, it is related to intelligent medical care technical field, for solving the problem that existing monitoring cannot distinguish vascular pathological crisis and nursing environment interference.First, a multi-dimensional time-varying state matrix containing physiological drive and nursing environment characteristics is constructed, realizing the time sequence alignment of heterogeneous data;Subsequently, the pressure-flow conduction characteristics are analyzed, and the blood flow conduction efficiency index reflecting the inherent patency of blood vessels is extracted;At the same time, a physical gain mapping is established based on nursing parameters, and the theoretical target perfusion trajectory under the current nursing state is deduced;Finally, the dynamic residual vector is calculated and combined with the conduction efficiency index for joint determination, accurately identifying vascular structural occlusion and functional inhibition of nursing program, achieving accurate tracing of postoperative crisis and dynamic evaluation of nursing program.

This invention relates to the field of medical device technology, and more particularly to an intelligent probe patch for monitoring blood circulation in microscopic free flaps, comprising: a disposable probe patch configured to be attached to the surface or edge of the free flap; a biocompatible adhesive layer is provided on the bottom surface of the flexible base of the disposable probe patch, and an auxiliary structure is provided on the top of the flexible base to resist postoperative tissue activity or secretions; the disposable probe patch integrates an optical sensing unit and a temperature sensing unit for collecting local blood oxygen saturation, pulse rate, and surface temperature of the flap, respectively; a repeater, establishing non-contact near-field coupling with the disposable probe patch, the repeater being configured to provide working power to the disposable probe patch through near-field coupling, enabling it to operate without a built-in battery; and synchronously receiving physiological parameter data reflecting the local microcirculation status of the flap collected by the disposable probe patch; and a terminal device, wirelessly connected to the repeater, receiving and processing the physiological parameter data.

The utility model discloses a non-invasive full-flexible skin flap transplantation post-operation multi-index monitoring wearable sensor which comprises a sealing cover sensing layer, a skin isolation layer and a sensor assembly arranged between the sealing cover sensing layer and the skin isolation layer. The sensor assembly comprises a strain sensor, a temperature sensor, a humidity sensor and a blood oxygen saturation degree sensor, the sealing cover sensing layer and the skin isolation layer are both made of flexible materials, and the lower layer of the skin isolation layer is used for making contact with the skin of a patient; the strain sensor, the temperature sensor, the humidity sensor and the oxyhemoglobin saturation sensor are respectively used for monitoring swelling, temperature, humidity and oxyhemoglobin saturation of a transplanted flap of a patient. The non-invasive full-flexible skin flap transplantation post-operation multi-index monitoring wearable sensor can non-invasively and continuously detect the swelling, temperature and humidity states of postoperative transplanted skin flaps and the change condition of blood oxygen saturation in real time, and the success rate of skin flap transplantation is increased.

The invention belongs to the technical field of flap retraction, and particularly relates to a flap retraction device for artificial cochlea electrode implantation surgery, which comprises a top plate, electric telescopic rods are fixedly connected to the two sides of the bottom wall, movable boxes are symmetrically and slidably connected to the bottom wall of the top plate, and guide rods are slidably connected to the bottom walls of the movable boxes in a linear array; the guide rod is hollow, the hollow part of the guide rod is communicated with the hollow part of the moving box, and the bottom end of the guide rod is coaxially and fixedly communicated with a connecting seat; the bottom wall of the suction cup is completely attached to the skin of a patient, the problem that local skin is bruised due to untight attachment in traditional rigid traction is avoided, the suction cup automatically adsorbs the skin and retracts the skin, when the skin is stretched to the limit, transverse traction is stopped, longitudinal lifting is conducted, and through linkage of a touch switch and a touch switch, the skin can be automatically pulled out. Excessive skin stretching caused by traditional traction is avoided, transverse and longitudinal two-dimensional traction is achieved, and a deep operation area is fully exposed.

A skin flap retractor device comprises a handle, a retractor mechanism and an adjusting mechanism. The retractor mechanism comprises a first retractor and a second retractor, which are movably arranged at the head end of the handle. The adjusting mechanism comprises a linkage, a first connecting rod and a second connecting rod. The linkage is provided with a first leg and a second leg. The first connecting rod is hingedly connected at one end to the first leg and at the other end to the first retractor. The second connecting rod is hingedly connected at one end to the second leg and at the other end to the second retractor. The head end is provided with a first arc-shaped slide rail and a second arc-shaped slide rail. The first leg passes through the first arc-shaped slide rail, and the second leg passes through the second arc-shaped slide rail. The linkage is rotatable relative to the head end. When the linkage is rotated by an operating assistant, the first leg and the second leg on the linkage drive the first connecting rod and the second connecting rod to move, and then drive the first retractor and the second retractor to move towards each other or away from each other. The interval is easy to adjust, the operating cost and time can be effectively saved, and the manpower and material resources can be reduced.

The utility model relates to the field of protection equipment, and discloses skin flap transplantation protection equipment with good safety, which comprises a bed head, box bodies are fixedly connected to the front end and the rear end of the bed head, third rods are rotatably connected to the inner walls of the opposite sides of the two box bodies, and worms are fixedly connected to the outer walls of the front end and the rear end of each third rod. Sleeves are fixedly connected to the positions, located on the two sides of the worm, in the two box bodies, worm wheels are fixedly connected to the lower portions of the outer walls of the four sleeves, the top end faces of the four sleeves are sleeved with first screws in a threaded mode, and the two first screws, located at the upper end of the same box body, of the four first screws are located on the two sides of the top end faces of the box bodies correspondingly. According to the utility model, the problems that the wound is further hurt due to the pressure of an externally applied article when the wound is subjected to ice compress for detumescence or externally applied anti-inflammatory drugs for diminishing inflammation after an operation, and the head of a patient moves due to the stimulation to the wound of the patient during subsequent stitch removal and wound cleaning can be solved, and the head is fixed according to the movement of the head.

The utility model discloses a skin draw hook for cervical lymphatic cleaning, which comprises a draw hook and a forceps holder, the forceps holder is movably connected with the draw hook, a plurality of sharp needles are fixedly mounted at one end of the forceps holder far away from the draw hook, and a chuck is fixedly connected at one end of the draw hook far away from the forceps holder. According to the utility model, the forceps holder is of the rake-shaped structure, the sharp needle with the 3-4 small hooks is arranged at one end of the forceps holder, and the end of the sharp needle is of the slightly sharp structure capable of puncturing skin flap tissues, so that the sharp needle cannot fall off after being hooked into the skin flap, and the clamping head can be matched with an operation towel for use; therefore, by means of the structure that the chuck is arranged at one section and the sharp needle is arranged at the other end, tool operation can be rapidly and conveniently converted in the operation process, and use is convenient.

An exemplary cochlear implant system includes a cochlear implant and a processing unit communicatively coupled with the cochlear implant. The cochlear implant may include a first optical element implanted within a recipient and positioned toward an inner surface of a skin flap of the recipient. The processing unit may cause an optical signal transmission between the first optical element and a second optical element included in an external device positioned toward outer surface of the skin flap relative to the first optical element. The optical signal transmission may include a transmission of an optical signal through the skin flap between the inner surface and the outer surface of the skin flap. Based on the optical signal transmission, one or more properties associated with the skin flap of the recipient may be determined.

A system includes an ultrasound device configured to generate sound waves for use in generating data indicating a measurement of a thickness of a skin flap of a recipient. A method includes determining a location of a measurement of a thickness of a skin flap of the recipient based on a current or expected location of an implantable device underneath the skin flap, and generating the measurement of the thickness of the skin flap using the ultrasound device. A computer-readable storage medium includes instructions stored thereon that cause one or more processors to generate the measurement of the thickness of the skin flap of the recipient based on sonic waves applied to the skin flap, and to generate an indication of whether one or more configurations of an external device are able to be retained on the skin flap based on the measurement.

The invention discloses a method for detecting the activity of skin flap endonuclease 1 based on double cascade signal amplification. Belongs to the technical field of enzyme activity detection. According to the invention, the specific dumbbell probe is designed; when the skin flap endonuclease 1 exists in the sample to be detected, the skin flap endonuclease 1 can be detected; a flap endonuclease 1 specifically recognizes and cuts off a 5'overhanging flap in the dumbbell probe to generate a single-stranded DNA with a 3 '-OH terminal and a dumbbell-shaped DNA with a notch, two products generated by cutting respectively trigger rolling circle amplification and strand displacement amplification reactions, specific signals are amplified, the purpose of sensitive detection is achieved, the substrate utilization rate is 100%, no probe is wasted, and the detection cost is reduced. The method is carried out under isothermal and homogeneous conditions, does not need high-precision thermal circulation and separation steps, does not need to prepare a functional nano material, does not relate to a biological coupling procedure, effectively reduces the analysis cost and complexity, and provides a technical support for the detection of the activity of the skin flap endonuclease 1.

The present invention provides a flap inspection device and a flap inspection method that can detect the separation of the outer flap from the inner flap with high precision. [Solution] A flap inspection device 10 according to one embodiment inspects a packaged body C having an inner flap that covers a part of the opening, and an outer flap that covers a part of the opening not covered by the inner flap and a part of the inner flap. The flap inspection device 10 includes a step detection sensor 13 that detects the step difference between the surface of the outer flap and the surface of the inner flap, and an abnormality determination unit 21 that determines that there is an abnormality if the value of the step detected by the step detection sensor 13 is greater than or equal to a threshold.

FIELD: plastic surgery.SUBSTANCE: under aseptic conditions and endotracheal anesthesia, hydropreparation of the subcutaneous fat tissue is performed with 0.04% ropivacaine solution 60.0 ml with adrenaline 1:100000, a skin incision in the area of the submammary groove of the mammary gland of 3.5–4.0 cm in length is made, the tissues are dissected layer by layer to the fascia of the pectoralis major muscle. A dissection is performed in the Chassignac space to the level of the lower pole of the areola or an incision is made in the skin in the area of the mammary gland along the lower semicircle of the areola, the tissues are perpendicularly dissected layer by layer to the fascia of the pectoralis major muscle. Next, dissection is performed in the Chassignac space to the level of the submammary groove, and the lateral edge of the right pectoralis major muscle is isolated. The retropectoral pocket for the implant is formed using blunt and sharp methods. The lower medial bundle of the pectoralis major muscle is mobilized to the level of 4 o'clock on a conventional clock dial for the right breast and to the level of 8 o'clock on a conventional clock dial for the left breast. Partial vertical myotomy of the free muscle flap is performed. The distal fragments of the pectoralis major muscle are fixed at three points to the posterior surface of the gland with an atraumatic Vikryl 2-0 thread at the level of the nipple-areolar complex. A silicone implant is placed into the formed pocket, and the implant is evenly distributed and centered within it.EFFECT: preventing uncontrolled cranialization of the pectoralis major muscle flaps during vertical myotomy in dual-plane augmentation mammoplasty.1 cl, 2 ex

The invention belongs to the field of biological medicine, and relates to treatment of skin flap avascular necrosis. The invention discloses a preparation method of an autologous dermal nitroglycerin sustained-release microneedle patch and application of the autologous dermal nitroglycerin sustained-release microneedle patch in prevention and treatment of skin flap avascular necrosis. The autologous dermal nitroglycerin sustained-release microneedle patch comprises a polyacrylic acid polymer base and a conical microneedle arranged on one side of the base, the conical microneedle is prepared from a mixture containing nitroglycerin, sodium hyaluronate and autologous nano dermis through a freeze-drying process. According to the autologous dermal nitroglycerin sustained-release microneedle, the histocompatibility of the microneedle is improved through application of autologous dermis, targeted and sustained release of nitroglycerin in a skin flap area is achieved through the microneedle, and skin flap avascular necrosis can be effectively prevented and treated; the method has remarkable advantages and good application prospects in the aspects of improving local drug concentration, improving the survival rate of skin flaps, reducing side effects and simplifying the treatment process.

The invention relates to the technical field of medical instruments, in particular to a disposable tympanic membrane and auditory meatus skin flap microscopic scalpel which comprises a grab handle, an auditory meatus skin flap scalpel end and a puncture curette end, and the auditory meatus skin flap scalpel end and the puncture curette end are fixed to the two ends of the grab handle respectively. The perforated curette end comprises a main body axially fixed on the grab handle, a bent section fixed at the end part of the main body and an elliptical ring fixed at the end part of the bent section, the main body, the bent section and the elliptical ring are integrally formed, an included angle is formed between the bent section and the main body, and convex elliptical cutting edges are arranged on two surfaces of the elliptical ring; the ear canal flap knife end comprises a knife rod fixed on the grab handle and a blade fixed at the end part of the knife rod, the blade is provided with an arc-shaped cutting edge, and the tip end of the blade is provided with a sharp edge. The scalpel can give consideration to tympanic membrane repairing and auditory meatus flap cutting operation, achieves multiple purposes, has higher operation efficiency and convenience, and is high in safety and low in manufacturing cost; the cutter changing steps and time in the operation are effectively reduced, and the operation efficiency is improved.

The present application relates to a kind of skin flap massager capable of detecting edema, including support, support is provided with two parallel mounting plates, mounting plate is equipped with slide rail, fixed seat is slidably installed on slide rail, each mounting plate is fixedly provided with eye ring;At least one massage device is installed on fixed seat;Massage device includes lead screw motor, the body of lead screw motor is fixed on fixed seat, vertical hole is vertically provided on fixed seat, the lead screw of lead screw motor is connected with massage head after passing through vertical hole, pressure sensor is arranged at the bottom of massage head;Pressure sensor and lead screw motor are connected with microprocessor, microprocessor drives lead screw motor to rotate and records lead screw motor rotation data, microprocessor is provided with edema detection process and massage process, detects skin flap edema and massages skin flap;Microprocessor controls the motion frequency of massage process according to instruction.The device detects the edema of skin flap after bandaging, and can massage skin flap simultaneously.

The invention discloses a throat defect repair guide plate generation method based on section stacking reconstruction, and relates to the technical field of medical image processing. The problems that an existing guide plate generation method is low in standardization degree, guide plate obtaining is difficult, and consumed time is long are solved. The core of the method is that automatic conversion from the three-dimensional defect to the two-dimensional guide plate is achieved through the multi-channel slice stacking reconstruction technology and the alignment mechanism, the two-dimensional guide plate graph matched with the postoperative defect in a high-precision mode is rapidly obtained, consumed time is short, the standardization degree is high, and the guide plate two-dimensional graph is used for guiding skin flap preparation of the corresponding shape. The method is mainly used for preparing the flap for repairing the hypopharyngeal carcinoma injury.

Methods and systems for evaluating tissue health of a recipient comprising receiving a measuring command at a sensor comprising at least one light emitting diode (LED) and a light detector are disclosed. The method further comprises emitting one or more light beams from the at least one LED in a direction of a medical device wherein the medical device is implanted subcutaneously or percutaneously in the recipient. The light detector receives one or more reflected light beams. The intensity of the reflected light beams from the light detector is measured and is used to determine an oxygen saturation value.

The invention relates to a thickness-adjustable skin flap separator, the thickness-adjustable skin flap separator comprises a skin grasping tooth assembly, a height adjusting assembly and a skin flap separator assembly, the upper part of the height adjusting assembly is connected with the skin grasping tooth assembly, the lower part of the height adjusting assembly is connected with the skin flap separator assembly, and the skin flap separator assembly is connected with the skin grasping tooth assembly. The skin grasping tooth assembly is used for clamping a corium layer on the edge of skin, the height adjusting assembly is used for accurately adjusting the thickness of a skin flap needing to be cut, the skin flap separator assembly is used for cutting the skin flap, and the cutting thickness of the skin flap separator assembly is controlled through the height adjusting assembly. According to the thickness-adjustable flap separator, the flap separation thickness can be accurately controlled in a flap separation operation, the problem that the flap thickness is not uniform due to experience differences of doctors is solved, and accurate separation is achieved.

The invention provides a multilayer artificial skin flap containing a built-in nutritional blood vessel and a preparation method of the multilayer artificial skin flap, and belongs to the technical field of tissue engineering and regenerative medicine. The artificial skin flap is sequentially provided with a first decellularized meat pulp matrix layer, a nutritional blood vessel, a fabric layer and a second decellularized meat pulp matrix layer from top to bottom. The nutrition blood vessel can construct a nutrition delivery channel for surrounding tissues, and promote rapid proliferation of cells and formation of a new blood vessel network; the decellularized meat pulp matrix layer provides a bionic microenvironment and supports cell adhesion, migration and growth; the fabric layer plays a role in enhancing mechanical support and simultaneously endows the flap with good stitchability and tear resistance; in addition, the nutritional blood vessel and the fabric layer are both made of degradable filaments, the degradation period can be regulated and controlled according to needs, and space and mechanical support smooth transition is vacated for tissue growth. The artificial skin flap has excellent biocompatibility, controllable degradability, active vascularization ability and proper mechanical properties, and is suitable for full-thickness skin defect repair and soft tissue regeneration engineering.