123results about How to "Efficient resection" patented technology

An endovascular tissue removal device including a lumen with a distal steerable tip portion extending from a joint portion, registration means for holding the joint portion fixed in place in the vasculature, and a source of ablation energy in communication with the lumen whereby tissue can be resected by ablation energy as the tip portion is steered within the vasculature.

An electrosurgical generator for supplying RF power to an electrosurgical instrument for cutting or vaporising tissue has an RF output stage with RF output devices, a series-resonant output network and an RF output. The generator offers improved cutting and vaporising performance, especially in relation to the reliability with which an arc can be struck when presented with an initial load impedance load. This is achieved by virtue of the output stage being capable of maintaining output pulses of at least 1 kW peak by supplying the RF output devices from a large reservoir capacitor. An appropriate combination of cutting performance and haemostasis is provided by allowing for pulsed or continuous wave operation once an arc has been established, according to whether or not a surplus energy condition exists, as indicated by the voltage across the reservoir capacitor.

The protection device is suitable to the on-line protection of the short circuit failure at DC 220 voltage, +/- 110 voltage in power plants and transformer substations. The invention is realized through following steps. The detection circuit for the short circuit in the branch through the data collection circuit, A/D conversion circuit is connected to the industrial control computer. The detection circuit for the bus voltage through the data collection circuit, A/D conversion circuit is connected to the industrial control computer. The detection circuit for the state of the breaker through the optical isolation input circuit is connected to the industrial control computer. The current criterion is I is greater than or equal to Id, and the voltage criterion is U is less than or equal to Ud.

An endovascular tissue removal system including an expandable mechanism introduceable to the ventricular side of a valve to support the leaflets of the valve in a closed position and a tissue removal device advanceable to the leaflets and configured to resect the leaflets as they are supported by the expandable mechanism.

The invention relates to a sugarcane combine harvester with a tail cutting device, which comprises a power system, an operation system, a front furling mechanism, a cutting mechanism and a leaf stripping and tail cutting mechanism arranged behind the cutting mechanism. A sugarcane conveying channel is formed in the leaf stripping and tail cutting mechanism. The leaf stripping and tail cutting mechanism is provided with the tail cutting device. The tail cutting device comprises at least one pair of tail cutting wheels which are positioned in the sugarcane conveying channel and are arranged up and down. The at least one pair of tail cutting wheels comprise first tail cutting wheels and second tail cutting wheels. Both the first and second tail cutting wheels comprise a mounting shaft and a roller. A plurality of elastic ribs which extend along the axial directions and the radial directions of the rollers are uniformly distributed on the outer peripheral surfaces of the rollers. The end faces outside the elastic ribs of the second tail cutting wheels are saw-toothed curved surfaces. The sugarcane combine harvester with the tail cutting device can be used for effectively cutting off tender stem parts on the tail parts of sugarcanes. Moreover, due to the tail cutting device of the combine harvester, the tail cutting effect is good.

The invention provides an overhead line inspecting and obstacle-clearing robot, which comprises a machine frame, wherein a crossing element and a travelling wheel crossing frame are arranged at one end of the machine frame; a lifting support plate part is arranged at the other end of the machine frame; an electrothermal cutting element is arranged at one side of the lifting support plate part; anda battery is arranged on the lifting support plate part. By adopting a resistance wire melting scheme, the overhead line inspecting and obstacle-clearing robot is high in speed and safe, and trees and greenhouses below or around a line are not endangered if no open fire appears; and through the design of a lifting work platform, the problem of incomplete clearance is solved and the overhead lineinspecting and obstacle-clearing robot can step over an obstacle and can effectively remove a foreign body.

The invention discloses a rotating cutter type overhead transmission line deicing and snow removal device, which comprises a deicing mechanism installing seat, a rotating driving device, a rotating support device, a rotating auxiliary device, a deicing machine frame, a deicing driving device, a deicing device and an angle measuring device, wherein the angle measuring device measures the angle of a transmission line deviating from the horizontal direction; the rotating driving device drives the rotating support device so that the deicing machine frame and the deicing device are parallel to the transmission line; the deicing driving device drives the deicing device to operate; the deicing device comprises a deicing knife and a rolling brush; the deicing mechanism installing seat comprises an upper installing seat and a lower installing seat; the rotating driving device comprises a step motor, a first shaft and a second shaft; the rotating support device comprises two first support rods; the rotating auxiliary device comprises two telescopic rods and two support air cylinders; the deicing machine frame is divided into two parts; the two parts are of a symmetrical structure and are fixed through screw bolts; one part structure comprises a machine frame upper plate, a first machine frame side plate, a second machine frame side plate and a separation plate; and the damage to the deicing device or the transmission line due to the contact between the deicing device and the transmission line is avoided.

The invention provides an HVDC (high-voltage direct current) system fault current limiting device and method based on a saturated core. On the basis that high inductance can effectively limit currentrising rate, variable inductance is produced automatically before and after the fault with application of the nonlinear principle of magnetization of a soft magnetic material in the method to limit DCfault current gradient, and DC fault current can be effectively cut off at the early stage through cooperation with a circuit breaker. By means of reasonable design for material, length and cross section of a core, material and length of a permanent magnet and turns of winding coils, operating characteristics of the current limiting device in a normal state are consistent with those of a smoothing reactor, and the current limiting device in a fault state can effectively limit fault current rising rate at the early stage of the fault. The device and the method have advantages as follows: the device has good effect for limiting the high rising rate of fault current at the rising stage, can effective cut off fault current at the early stage of the fault when cooperating with the DC circuit breaker, and can be taken as the smoothing reactor to stabilize current of a DC system when in the normal state.

The invention relates to an OS combined hair follicle extraction device and an extraction method thereof. The OS combined hair follicle extraction device comprises a hollow tube and a hair push rod, wherein the hair push rod is arranged in a hollow cavity of the hollow tube, a needle is arranged at the lower end of the hair push rod and extends out of the hollow tube, a groove is formed in one side of the needle, and the hair push rod is controlled through a control button. The length of the hollow tube is 11-13 cm, the tube diameter is 1 cm, the exposure length of the needle is 5-25 mm, the needle diameter is 0.8-1.8 mm, and the extraction method comprises the steps of routine examination before transplantation, hair follicle detection, image design, angle customization, hair follicle extraction, hair follicle separation, hair follicle planting and care after planting. By the adoption of the extraction device and the extraction method, the speed of hair follicle extraction can be effectively improved, hair loss, cicatricial alopecia and scant eyebrows, eyelashes, beards and other parts can be safely and efficiently handled, and the hair transplanting process is achieved by adopting a reasonable technology and using the shortest time.

The invention discloses an adjustable saw type excising device for intervertebral disc under a spinal endoscope, and belongs to the field of medical apparatuses. The adjustable saw type excising device comprises a connecting pipe, a handle arranged at one end of the connecting pipe, a first spherical sleeve arranged at the other end of the connecting pipe, a steering group arranged on the first spherical sleeve and a cutting group arranged on the steering group, wherein the steering group comprises a hollow ball which is arranged in the first spherical sleeve and is movably connected with thefirst spherical sleeve, a resecting pipe which is arranged on the outer side of the first spherical sleeve and is connected with the hollow ball and a second spherical sleeve arranged on the resectingpipe. According to the adjustable saw type excising device disclosed by the invention, a doctor can adjust the operating angle of a saw disc and perform high-efficient resecting on a pulpiform nucleus which is tough in character, a fiber ring and a cartilage adhered to a centrum endplate; and a manner of slow removing through biting by a pulpiform nucleus plier under an endoscope is replaced by rotation resecting by the saw disc, "a removing point" is replaced by "an operation surface", so that the efficiency and the success rate of discectomy under the endoscope and lumbar interbody fusion are notably increased.

The invention discloses a SUMO (small ubiquitin-related modifier) and SUMO protease encoding gene, encoding protein and application thereof. The invention relates to a Saccharomyces cerevisiae gene sumo (S), which is defined by the nucleotide sequence of SEQ ID No.1 in the sequence table. The encoding protein of the Saccharomyces cerevisiae gene sumo (S) is defined by the amino acid sequence of SEQ ID No.2 in the sequence table. The SUMO protease gene ulp (S) provided by the invention is defined by the nucleotide sequence of SEQ ID No.3 in the sequence table. The encoding protein of SUMO protease gene ulp (S) provided by the invention is defined by the amino acid sequence of SEQ ID No.4 in the sequence table. The invention can realize high expression of Saccharomyces cerevisiae sumo gene and SUMO protease ulp gene in Escherichia coli, specifically realize high expression in the commonly used expression strain BL21(DE3) of Escherichia coli, and ensures that the function is not affected.

The invention relates to the field of masks, in particular to a protective mask production process which includes the steps: firstly, inputting and compounding an outer filter layer, a middle filter layer and an inner filter layer to form mask raw materials; secondly, forming a pleating part in the middle of the mask raw material; 3, inputting, cutting off and compounding the nose clamping strip on the mask raw material; 4, turning over the inner filter layer to cover the outer filter layer; 5, forming a mask body area on the continuously-input long-strip-shaped mask raw materials; 6, cuttingoff to form a single mask body; 7, performing differential separation, and increasing the distance between the continuously-conveyed mask bodies; 8, unwinding, inputting and cutting off the ear pieces, and bonding the ear pieces with the two ends of the mask body; 9, performing slitting; 10, performing outputting. The technical problems that ear hanging parts of an existing mask are poor in connection firmness, inconvenient to produce and low in production efficiency are solved. Meanwhile, the invention also relates to a device for realizing the process.

The invention discloses an adjustable reciprocating excising device for intervertebral disc under a spinal endoscope, and belongs to the field of medical apparatuses. The adjustable reciprocating excising device comprises an inserting pipe, a handle arranged at one end of the inserting pipe, a first universal sleeve arranged at the other end of the inserting pipe, a steering group arranged on thefirst universal sleeve and a cutting group arranged on the steering group. According to the adjustable reciprocating excising device disclosed by the invention, a doctor can adjust the operating angleof a cutting disc, and replace a "point type " biting type slow removing process of intervertebral disc tissue with pulpiform nucleus pliers under an endoscope by a "surface type " intervertebral disc tissue resecting through slicing, and a pulpiform nucleus which is tough in character, a fiber ring and a cartilage adhered to a centrum endplate can be polished and excised in a "bone filing type "manner, so that the efficiency and the success rate of the discectomy under the endoscope and lumbar interbody fusion are notably increased.

The invention relates to a comprehensive hair follicle extraction and transplanting method adopting TDDP (three-dimensional one, dynamic aesthetics and double speed recovery plastic). The method comprises the steps of conventional physical examination before transplanting, hair follicle detection, style design, angle customization, hair follicle extraction, hair follicle separation, hair follicle transplanting and post-transplanting nursing. The method has the advantages that alopecia, scarring alopecia and hypotrichosis of eyebrows, eyelashes, beard and other parts can be treated safely and efficiently, a hair transplanting process is realized with a reasonable technology and shortest time, meanwhile, scalp tissue in an alopecia area is improved effectively, newly growing hair after transplanting is increased, scalp inflammation is inhibited, scalp microvessel regeneration is promoted, blood and oxygen supply of the scalp is improved, hair follicles are stimulated sufficiently, the hair growth rate is doubled, and a better inhibiting function on certain skin inflammation such as seborrheic dermatitis and the like is realized.

The invention discloses an adjustable shear-type intervertebral disc ectomy device under a spine endoscope, and belongs to the field of medical devices. The adjustable shear-type intervertebral disc ectomy device comprises a main pipe, a handle arranged at one end of the main pipe, a first universal sleeve arranged at the other end of the main pipe, a steering set arranged on the first universal sleeve, and a cutting set arranged on the steering set; and the cutting set comprises a connecting ball arranged in a second universal sleeve, a cutting shell arranged on the connecting ball, a drivingmotor arranged in the cutting shell, and a tool bit arranged at the front end of the cutting shell and connected with the output end of the driving motor. The shearing function on fibrous rings and nucleus pulposus tissue in the intervertebral disc is achieved, the efficiency of an intervertebral disc tissue ectomy operation under the endoscope is improved, and the success rate of the intervertebral disc tissue ectomy operation under the endoscope is increased.

The invention discloses a preparation method of human-derived copper-zinc superoxide dismutase. The preparation method includes: inserting a sequence as shown in SEQ ID No. 2 into an original carrierto build a recombinant carrier, performing expanding culture, then extracting an expression product, performing N-His-TEV-hSOD1 enzymolysis, and purifying to obtain hSOD1. The preparation method has the advantages that the target gene sequence is designed according to codon preference, a His-TEV label is added to the N tail end, and expression heterology is avoided while the safety risks of animalor human sources are avoided; the His purification label and the TEV recognition site of the label is removed during sequence design, purification is benefited, and the His label can be removed conveniently to meet the requirements of pharmaceutical protein; the expression of the hSOD1 expressed by an expression strain is soluble expression, expression quantity is increased evidently when Cu<2+>and Zn<2+> are added for induction, and the requirements of large-scale production are satisfied.