6 results about "Penetration length" patented technology

The invention discloses an open type damage-free microneedle hair follicle planting pen which comprises a handle cylinder, a slidable needle withdrawing pushing assembly, a microneedle fixing assembly, a microneedle and a depth setting part. The depth setting piece is installed on the needle withdrawing pushing assembly, and a groove is formed in the end, close to the needle tip end of the micro needle, of the depth setting piece. The groove is formed in the depth setting piece, so that an operator can obtain a wide view through the groove, and hair follicles can be conveniently inserted into the side holes of the micro-needle and placed on the ejector pin. And the ejector pin can retreat into the groove, so that the effective piercing length of the microneedle is accurately shortened, and stable and uniform planting depth control is realized. And meanwhile, the contact surface of the depth setting piece and the scalp is changed from an annular shape into a local support shape by the groove structure, so that scraping and compression on surrounding implanted hair follicles are remarkably reduced in the piercing and withdrawing processes, and secondary injury is effectively avoided. The implanting pen has the functions of precise depth control, wide visual field and no-damage protection, and the survival rate, the attractiveness and the operation efficiency of hair follicle transplantation can be improved.

The present disclosure relates to a kind of water deep penetration guide seam fracturing reservoir engineering design methods, comprising: using water deep penetration perforation method, drill open horizontal long hole in the top of thick oil layer, the horizontal long hole is drilled in low water content direction on plane, and drainage channel is formed in the part where water drive oil capacity is weak;The penetration length of the water deep penetration perforation is determined according to the development thickness of oil layer, injection-production connection relationship, injection-production distance, the number of perforation is in the same direction on the top of each subdivision layer blocked by interlayer, and it is 0.2-0.4m away from upper barrier or interlayer;After the water deep penetration perforation, hydraulic fracturing is carried out to form artificial fracture, let the drilled horizontal long hole guide the longitudinal position and horizontal trend of artificial fracture, to improve the flow conductivity again, realize the purpose of "targeting" tapping of remaining oil enrichment site in the cubic of injection-production well positive rhythm oil layer.

The invention discloses a novel single-port laparoscopic fascia closer for obese patients, which relates to the field of medical instruments and comprises a closed insertion guide rod, and the bottom end of the closed insertion guide rod is connected with a positioning and unfolding mechanism used for unfolding and positioning on two side surfaces of an inner fascia surface of an abdominal wall incision. The upper portion of the closed insertion guide rod is provided and connected with a puncture mechanism used for penetrating through fascia. The closer does not need to be specially modified and can be used through a standard single-port laparoscope cannula or an incision, and the universality under different operation platforms is guaranteed; meanwhile, enough penetrating length and an ingenious positioning mechanism are achieved, hypertrophy abdominal walls and deep fat layers can be dealt with, and it is ensured that a suture needle accurately penetrates through fascia; and moreover, the suture process is optimized, the operation steps are reduced as much as possible, and the time required for closing the incision is remarkably shortened.

The utility model relates to the technical field of tunnel construction steel bar cold pressing, in particular to a novel cold extrusion sleeve. Comprising a novel sleeve, the novel sleeve comprises a sleeve wall, a sleeve cavity is formed in the sleeve wall, an inner baffle is arranged in the center of the sleeve cavity and divides the sleeve cavity into a first sleeve cavity and a second sleeve cavity, and the first sleeve cavity and the second sleeve cavity are in mirror symmetry relative to the inner baffle; the outer side of the sleeve wall is provided with a boundary mark, and the radial symmetry axis of the boundary mark is located on the center cross section of the sleeve cavity. An inner baffle is arranged in the improved sleeve, a constructor can accurately stretch steel bars into the sleeve, the depth length is guaranteed through the baffle, and it is guaranteed that the joint of the two steel bars is located in the center of the sleeve. An extrusion center boundary mark is arranged outside the sleeve, so that a reliable and accurate extrusion position can be provided for an extrusion operator, and the boundary mark is prevented from being extruded. According to the scheme, positioning of the inner center and the outer center of the sleeve is facilitated, and the qualified rate of extruded finished products is well increased.

The utility model belongs to the technical field of alloy boring cutters, particularly relates to an alloy boring cutter capable of adjusting boring depth, and aims to solve the problem of looseness of the existing cutter, the alloy boring cutter comprises a cutter bar, a sleeve is connected below the cutter bar, the bottom end of the sleeve penetrates out of a cutter, a sliding groove is formed in the outer wall of the sleeve, and the cutter is arranged in the sliding groove. An adjusting mechanism is arranged on one side of the sliding groove. The cutter is driven by the connecting disc to be in bolted connection with the limiting block so as to be convenient to disassemble, assemble and replace, the sliding lantern ring drives the fixing block to slide along the sliding groove through the sliding block, the fixing block limits the limiting block through the limiting hole so as to prevent the cutter from loosening during rotation, and the penetrating length of the cutter is adjusted according to the boring depth. The upper connecting ring and the lower connecting ring are in threaded connection with the sleeve, so that the lantern ring is fixed, the cutter can be fixed and limited, and the sliding block is limited through the sliding groove, so that the situation that the lantern ring is affected by rotating force, and consequently the upper connecting ring and the lower connecting ring are loosened is avoided.

The mouth gag comprises a base, a lighting assembly, a supporting block and an adjusting assembly, the lighting assembly is arranged on the upper side of the outer portion of the base, a screw rod is rotated by rotating a rotary knob, the screw rod can move in the front-back direction, the depth length of the screw rod is adjusted, and then a cold light lamp is turned on; all parts of the oral cavity of the patient are fully illuminated, so that medical staff can conveniently observe the condition in the oral cavity; an adjusting assembly is arranged on the rear side of the base, a push rod is pulled downwards, a clamping block is made to be away from clamping teeth, a rotating disc is rotated, a forward-reverse lead screw is rotated, two sliding blocks start to move synchronously, at the moment, a connecting rod drives a supporting block to be close to the mouth corners of the two sides of a patient, and after the oral cavity of the patient is opened to the designated size, the push rod is loosened, and the clamping block is inserted into the clamping teeth again; the connecting rod is prevented from driving the supporting block to slide, the oral cavity of the patient is effectively fixed, and medical staff can conveniently conduct treatment.