3 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.