169results about How to "Prolong surgery time" patented technology

A jaw heating element of a handpiece of a thermal tissue operating system is tested on an ongoing basis by supplying a test heater power signal to the jaw heating element between individual thermal tissue operations. Voltage and current through the jaw heating element is sensed and the resistance of the jaw heating element is calculated. If the calculated resistance is outside a range of predetermined acceptable values, an error condition is indicated.

Surgical instruments, implantable articles and surgical procedures disclosed for treating medical disorders, particularly incontinence. Improved surgical sling procedures are disclosed. Novel surgical instruments and kits for use in sling procedures are also disclosed. The present invention affords options for surgeons with concomitant advantages to the patient and the healthcare provider.

Surgical positioners may include platforms, surgical item positioners and / or surgical references as well as methods for using stabilizer platforms, surgical item positioners and / or surgical references. Stabilizer platforms may include low profile platforms rigidly mounted to portions of an individual's anatomy. Various items may be secured and / or stabilized by the stabilizer platform, including support platforms as well as surgical references. Support platforms may stabilize and assist surgeons in using, navigating, aligning and positioning surgical items. Surgical references may include modular fiducial systems that may be secured to stabilizer platforms, support platforms, surgical items and / or directly to portions of an individual's anatomy.

The invention discloses a method for preparing brain tissue and vascular entity composite model based on MRI (magnetic resonance imaging) and CTA (CT angiography). The method includes: 1), acquiring image data of head and neck skull, brain tissue, vessel and arterial aneurysm; 2), leading acquired MRI and CTA original image data into three-dimensional reconstruction software, structuring a 3D composite virtual model containing the skull, brain tissue, vessel and arterial aneurysm and outputting to a 3D printer for 3D model printing in a format that the 3D printer can print to acquire the three-dimensional entity composite model containing the skull, brain tissue, vessel and arterial aneurysm. The model is quite high in simulation degree, so that doctors can perform preoperative discussionof surgical planning, preoperative risk assessment and design of operative route or even simulate operation in combination with the model; the brain tissue model is of fluid silicone brain tissue thatcan be pulled apart and can be pulled apart as in actual operation, so that the doctors are more confident, and operation risks are lowered.

A jaw heating element of a handpiece of a thermal tissue operating system is tested on an ongoing basis by supplying a test heater power signal to the jaw heating element between individual thermal tissue operations. Voltage and current through the jaw heating element is sensed and the resistance of the jaw heating element is calculated. If the calculated resistance is outside a range of predetermined acceptable values, an error condition is indicated.

Systems and methods for removing an epithelial layer disposed over a stromal layer in a cornea irradiate a region of the epithelial layer with a pulsed beam of ablative radiation. The ablative radiation is scanned to vary the location of the beam within the region in accordance with a pulse sequence. The pulse sequence is arranged to enhance optical feedback based on a tissue fluorescence of the epithelial layer. The penetration of the epithelial layer is detected in response to the optical feedback. The use of scanning with the pulse sequence arranged to enhance optical feedback allows large areas of the epithelium to be ablated such penetration of the epithelial layer can be detected.

A system of instruments is provided for vitrectomy surgery, comprising a sharp trochar, a cannula and a cannula valve cap. The sharp trochar provided also has applicability to other fields of surgery. The sharp trochar has a hollow-ground blade that reduces the force necessary for insertion and upon removal leaves a wound with improved healing characteristics. The trochar is selectably insertable in a cannula, and in a preferred embodiment the cannula and the trochar are adapted with mutually tapered exterior surfaces to as to define a smooth transition in diameter to further facilitate insertion. A sealing valve cap is also provided for the cannula, designed to provide sealing while reducing the force required in for inserting instruments into the cannula. A method for angled insertion of this assembly is also disclosed.

Surgical instruments, implantable articles and surgical procedures disclosed for treating medical disorders, particularly incontinence. Improved surgical sling procedures are disclosed. Novel surgical instruments and kits for use in sling procedures are also disclosed. The present invention affords options for surgeons with concomitant advantages to the patient and the healthcare provider.

A system and method are provided that use a formable bone plate and a clamping apparatus for small bone reconstruction. The formable bone plate includes a plate body having a plurality of nodes separated by internodes. Each node includes a hole formed therein for receiving a screw, wire, tack, or other fixation device screwed or placed into a bone. A clamp engages an engagement section of the node to facilitate bending of at least one of the internodes to contour the plate to the bone in-situ or ex-situ and when at least partly screwed to or not screwed to the bone.

In order to provide an audio signal amplification method and apparatus capable of directly connecting a load such as a speaker to a driver unit of a class-D amplifier without an LC filter, an output data from a ΔΣ converter 31 for compressing a digital audio data from a digital audio source is applied to a pulse width modulator 33 by way of a low pass filter 32 and a driver unit is controlled by a driver control circuit 35 by way of a delay device 34. A speaker 37 as a load is directly driven by P output and N output from the driver unit 36.

A valve system comprising a valve design in which the valve is normally closed is disclosed. The normally closed valve can comprise a circular valve seal face formed by the underside of a rim of an elastomeric valve boss and a circular valve seat, which is formed by the rim of a through-hole molded into, for example, a plastic cassette, such that the valve seal face, the valve seat, and the through hole are concentric. The valve boss can be a hollow “mushroom” shaped valve boss, or a conical-shaped valve boss. If no force is applied to the inside surface of the valve boss, no fluid can pass through the valve as the valve seal face rests against the valve seat as a result of the steady free-state load created by the stretch of the valve boss over the slightly longer through hole. When a force is applied to the inside surface of the valve boss, the valve seal face is displaced from the valve seat, allowing fluid between the valve seal face and valve seat and then to pass between the valve boss and the inside surface of the through hole.

The invention provides a subapical osteotomy locating guide plate and a manufacture method therefor. The subapical osteotomy locating guide plate belongs to assisting medical instruments. The subapical osteotomy locating guide plate comprises a locating occlusion plate (1), connecting rods (2) and maxillary osteotomy line guide plates (3). The locating occlusion plate (1) is provided with an initial tooth print (11) and is connected with the maxillary osteotomy line guide plates (3) via the connecting rods (2). Each maxillary osteotomy line guide plate (3) is provided with two screw holes (6). The maxillary osteotomy line guide plates (3) are provided with non-circular insertion grooves b (31). One end of each connecting rod (2) matches the corresponding insertion groove b (31). The subapical osteotomy locating plate solves the problem that no intermaxillary bone locating guide device is available in subapical osteotomy. When the subapical osteotomy locating guide plate is applied to assist doctors with surgeries, the current most common complication of subapical osteotomy can be prevented.

The invention discloses a modeling method of a necrosis caput femoris restoring model based on an umbrella-shaped caput femoris supporter. The modeling method comprises the steps that firstly, a three-dimensional model of a to-be-restored caput femoris is obtained, wherein the NURBS curved surface model of the to-be-restored caput femoris is obtained, the to-be-restored caput femoris is a caput femoris which exists in the thigh tissue necrosis area and is pre-restored by the caput femoris supporter, and the caput femoris supporter is composed of an umbrella-shaped supporter body and a supporting sleeve; secondly, the necrosis area needing to be separated is determined according to the shape of the umbrella-shaped supporter body, and a necrosis caput femoris model is established; thirdly, a caput femoris supporter model is established; fourthly, a necrosis caput femoris implantation model is established, wherein the necrosis caput femoris implantation model with an implantation channel and a three-dimensional model of an implanted bone are established; fifthly, the necrosis caput femoris restoring model is established. The modeling method is simple in step, reasonable in design, convenient to achieve and good in using effect, the restoring model of the caput femoris supporter implanted into the necrosis caput femoris can be easily, conveniently and quickly established, and the quality of the established restoring model is high.

A convertible chair, for example, a hair transplantation chair that permits movement of the patient during a procedure while the patient's head remains substantially stationary. The chair may include a head support and a plurality of body supports that may be mounted on a base, or on a cradle movably attached to the base. The chair can be configured for a follicular unit harvesting procedure and it could be also converted into a hair implantation configuration for hair implantation procedure. The patient remains in the chair during the procedure with his head substantially stationary, while various parts of his body may be repositioned, for example, by rotation of the cradle. The chair may be automated, or assisted with pneumatics, motors, foot pumps and the like. The chair is particularly useful for assisting robotic hair transplantation procedures.

Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. F1>F2 is satisfied when a fixing force for fixing the endoscope-coupled part to the endoscope tool is defined as F1 and a fixing force for fixing the treatment tool-coupled part to the treatment tool is defined as F2.

A method for automatically monitoring the penetration behavior of a trocar held by a robotic arm and monitoring system is provided. The method and system automatically monitors the penetration behavior of a trocar held by a robotic arm and / or an instrument guided through the trocar into a body cavity through an incision in the surface of the body of a patient during a surgical procedure. At least one measured value is recorded, by which a change in a force effect on the surface of the body of the patient may be determined, and automatic evaluation of the measured value with regard to a reference measured value is conducted. Comparison of the change in the measured value or the change in the force effect with a threshold value is made, and an indication in the event of the threshold value being exceeded is outputted.

Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and in which operability is high. The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. The overtube body is configured to allow the treatment tool to rotate around an axis thereof without changing the positional relationship of the endoscope and the treatment tool with respect to the overtube body.

A method of dispensing surgical fasteners includes providing an applicator instrument having a housing with a cartridge opening, an elongated shaft extending from the housing, a firing system disposed within the housing for dispensing surgical fasteners, and an actuator for activating the firing system. The method includes forming a surgical opening in tissue, inserting a distal end of the elongated shaft into the surgical opening, inserting a cartridge containing a plurality of first surgical fasteners into the cartridge opening, and engaging the actuator for dispensing one of the first surgical fasteners from the distal end of the elongated shaft. While maintaining the distal end of the elongated shaft inside the surgical opening, the cartridge is removed from the cartridge opening, a second cartridge containing a plurality of second surgical fasteners is inserted into the cartridge opening, and the actuator is engaged for dispensing one of the second surgical fasteners from the distal end of the elongated shaft.

The invention belongs to the field of biomedical engineering, and particularly relates to a method for rapidly preparing an intraoperative individual covered stent for treating aortic arch dissection.The method comprises the following steps: copying a pathologically changed aortic arch of a patient in a proportion of 1: 1 by using a 3D printing technology through CT image data of the patient; marking a blood vessel branch opening, position and size of the aortic arch on a transparent diaphragm by using an aorta 3D model; taking a covered main stent, covering the covered main stent by using amarked sheet, and successively forming holes in positions corresponding to branched blood vessels; and selecting small covered stents of which the diameters are matched with the diameters of the holesof the stent, and separately stitching the small covered stents to the various holes to obtain the individual covered stent which is completely matched with the patient. The purpose of accurately treating Stanford A type aortic arch dissection can be achieved, individual treatment is implemented, time of operation is saved, hemorrhage during operation is relieved, and postoperative complicationsare greatly reduced.

The invention discloses a modeling method of a necrotic femoral head repair model based on an umbrella-shaped femoral head supporter. The bone is the femoral head that has femoral tissue necrosis area and is pre-repaired with the femoral head supporter; Necrotic femoral head model; 3. Establishment of femoral head support model; 4. Establishment of necrotic femoral head implant model: establishment of necrotic femoral head implant model with implant channel and 3D model of implanted bone; 5. Necrotic femoral head repair Model building. The method of the invention has simple steps, reasonable design, convenient implementation and good use effect, and can easily and rapidly establish a repair model for implanting a femoral head supporter into a necrotic femoral head, and the established repair model is of high quality.

The invention discloses a suction catheter. The suction catheter comprises a catheter body and a balloon which is connected to the outside of the catheter body and is used for stopping blood flow after expanding; a guide wire infusion cavity for infusing normal saline and / or circulating blood flow, a suction cavity for absorbing thrombi under negative pressure and a balloon cavity for inflating and deflating the balloon are formed in the catheter body; a guide wire is detachably inserted in the guide wire infusion cavity; the guide wire infusion cavity communicates with two sides of the balloon and comprises a positioning section for penetrating through the thrombi; and the positioning section and a suction opening of the suction cavity are arranged on the same side of the balloon. According to the suction catheter, the balloon stops blood flow, the suction cavity can provide the negative pressure, the guide wire infusion cavity can form cavities communicating with the two sides of theballoon, blood flow and / or normal saline are / is provided for thrombus far ends from the guide wire infusion cavity to increase the pressure of the thrombus far ends, difference between pressures of the two sides of a thrombus can be increased under cooperation of the suction cavity, thrombi are pushed to the suction opening, and the suction effect can be improved.

A method and apparatus for frame interpolation of an ultrasound image is provided. The frame interpolation method includes: calculating an optical flow using an ultrasound image of a first frame and an ultrasound image of a second frame; determining an interpolated frame between the first frame and the second frame; calculating an optical flow of the interpolated frame using the calculated optical flow; and creating an ultrasound image in the interpolated frame from the optical flow of the interpolated frame.

A surgical instrument for acetabular cup implantation includes an acetabular cup, a shell body and a drive shaft. The drive shaft includes a drive rod and a handle bar. The handle bar engages the pivot for angular displacement having forward position and backward position. In the forward position the drive rod rotates the acetabular cup forward, and in the backward position the drive rod shifts backward resulting in the acetabular cup engaged the extension portion. Accordingly, the operator rotates the handle bar to control the acetabular cup inserting into the position of acetabulum. The rotation of the handle bar results in the gripping or releasing of the acetabular cup or insert from the invention. Thus the invention provides a clear and ergonomic instrument for medical personnel concerning the operation of acetabular cup implantation.

A staining composition for staining an ophthalmic membrane when performing the ophthalmic membrane removal, wherein the staining composition comprises a Brilliant Blue G (BBG) derivative as a primary component.

The invention discloses an orthopedic positioning guide pin guiding device and effectively solves the problems that the orthopedic positioning guide pin guiding device cannot provide accurate positioning in the positioning and guiding process, manual operation occurs big errors, repeated pin penetration and fluoroscopy is harmful to the health of both doctors and patients, the existing guiding device cannot move freely and be fixed on an operating table, and the guide pins with different diameters cannot be well fixed. The orthopedic positioning guide pin guiding device comprises a vehicle body; the upper end of the vehicle body is provided with a gear box capable of sliding forwards and backwards on the upper end surface of the vehicle body; a rotatable driving gear is arranged in the gear box; a first gear, a second gear and a third gear are uniformly arranged on the left side of the driving gear; a connecting gear capable of sliding up and down is meshed between the first gear and the driving gear; a rotatable gearshift mechanism is fixedly connected above the connecting gear; and a structure is formed in which the connecting gear is meshed with the first gear, the second gear and the third gear.

The invention discloses a plastic artificial bone which contains, by weight, 50%-90% of porous calcium phosphate ceramic and 50%-10% of soluble collagen. The soluble collagen forms a three-dimensional collagen fiber net structure in gaps of the porous calcium phosphate ceramic. A preparation method of the plastic artificial bone comprises the steps that the porous calcium phosphate ceramic is firstly and ultrasonically rinsed, and then collagen pretreatment A and collagen pretreatment B are performed; then, the porous calcium phosphate ceramic is put in pretreatment collagen A and pretreatment collagen B for infiltration and coating, freeze-drying and crosslinking are performed to obtain the plastic artificial bone. The adverse influence of matrix metalloproteinase (MMP-2 and MMP-9) and Stromelysins and Matrilysin on wounds is weakened through the collagen pretreatment A, and the mechanical strength of the plastic artificial bone is enhanced through the collagen pretreatment B. The plastic artificial bone has a uniform three-dimensional structure through coating and then freeze-drying and crosslinking, and the repair of the bone tissues can be better guided and accelerated.

An overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided in the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A fluid-supplying connector that is provided on a base end surface of the overtube body, and has an axial direction that is made parallel to a longitudinal axis of the overtube body, and is detachably connected to an air supply tube for sending fluid into the body cavity through an internal space of the overtube body.