6results about How to "Reduce postoperative infection" patented technology

The invention discloses a femtosecond laser-based implant with a neck controllable hierarchical microporous structure and a preparation method thereof, and relates to the technical field of dental implant preparation. According to the method, aiming at the neck area of the implant, the processing characteristics of high precision and low heat influence of femtosecond laser are utilized, and a graded micropore structure with controllable aperture size and spatial distribution is constructed in the neck area by regulating and controlling the laser scanning times; the graded microporous structure comprises at least two stages of micropores with different pore diameters and is used for realizing graded loading of functional particles or bioactive components. Compared with an existing dental implant surface treatment mode, on the premise that the overall mechanical property of the implant is not damaged, precise regulation and control over the surface appearance of the neck area are achieved, the hydrophilicity, biological activity and antibacterial and anti-inflammatory performance of the surface are remarkably improved, the soft and hard tissue interface environment is improved, and the long-term stability of the implant is improved.

The utility model discloses a disposable balloon uterus stent which comprises a catheter, a second balloon located in the middle of the catheter and an elastic binding sleeve located at the end of the catheter. The second balloon is made of a medical silica gel material; the elastic binding sleeve is made of medical elastic rubber, and a first balloon is installed at one end of the catheter. The utility model has the beneficial effects that the second balloon is matched with the first balloon to achieve the effect of simultaneously compressing the upper part and the lower part, and sterile liquid can be filled into the second balloon to support the second balloon when in use, so that expansion extrusion type hemostasis can be performed on the vagina, and the lower section is prevented from bleeding; the drainage channel and the water filling catheter can be bundled together through the arranged elastic bundling sleeve, the drainage channel and the water filling catheter can be conveniently stretched into the vagina, and the problems that an existing balloon uterus stent is prone to scratching a patient in the catheterization process, the vagina of the patient is damaged, and the safety risk is high are solved.

The present invention relates to a disposable puncture device, which belongs to the field of medical devices and is a laparoscopic supporting surgical instrument suitable for laparoscopic examination and establishment of surgical working channels. It includes a locking cap, a puncture sleeve assembly, a locking sealing cap assembly, a locking switch, an air blocking sealing cap, an air injection valve, an air injection switch, a positioning ring, a one-way valve, a sealing patch and an air bag; the puncture sleeve assembly is composed of a puncture sleeve seat and a puncture sleeve, and the locking sealing cap assembly has a sleeve elastic sealing cap, a sleeve sealing cap mounting seat, a locking fixing cover, and a lower pressing cover. A ventilation groove is arranged on the outside of the puncture sleeve, and the ventilation groove extends forward to the front part of the puncture sleeve along the axial direction of the puncture sleeve and passes through the wire binding groove; the air bag is installed at the front end of the puncture sleeve and is fixed to the outer periphery of the wire binding groove by bundling, and the air outlet arranged on the sealing patch is used to transport compressed air to the air bag to inflate the air bag; the positioning ring is set on the middle part of the puncture sleeve.

The invention relates to the technical field of medical instruments, and discloses a novel intracranial pressure detection device which comprises a hose, a signal line is fixedly connected to the inner wall of the hose, a connector is fixedly connected to the end, away from the hose, of the signal line, and a pressure detector is fixedly connected to the end, away from the connector, of the signal line. A flow guide pipe is fixedly connected to the inner wall of the hose, a probe is movably connected to the inner wall of the flow guide pipe, the fixing mechanism comprises a first annular plate movably connected to the outer wall of the hose, a first hollow column is fixedly connected to the bottom of the first annular plate, and the inner wall of the first hollow column is movably connected with the hose. A round hole is formed in the top of the annular plate I. By arranging the fixing mechanism, after the probe is put in, the operation space reserved in the bottom assembly is blocked, the contact area of a wound and external air is reduced, and the possibility of postoperative infection is reduced.

The application relates to a biological 3D printing cartilage-fiber-epithelium integrated tissue engineering trachea and a construction method and application thereof. First, cartilage specific biological ink is prepared by wrapping cartilage cells with cartilage tissue specific hydrogel; fiber specific biological ink is prepared by wrapping fibroblasts with fiber tissue specific hydrogel; epithelium specific biological ink is prepared by wrapping epithelial cells with matrix hydrogel; then, through a step-by-step assembly strategy, a C-shaped cartilage ring and a fiber ring are alternately printed and a ring-shaped tubular structure is formed by using a double-needle extrusion type biological 3D printing technology, and then a layer of epithelium specific biological ink is attached in the lumen to construct a tubular structure of cartilage-fiber-epithelium multi-tissue composite; it is verified that after being implanted subcutaneously in a naked mouse for 8 weeks, a relatively mature cartilage-vascularized fiber-epithelium tissue composite tissue engineering trachea can be regenerated, and a clinically transformable strategy is provided for the regeneration treatment of complex tracheal injury.

The invention relates to the technical field of biopsy forceps, and discloses a biopsy forceps head assembly passing through a bronchoscope and a lung cancer tumor sampling method thereof.The biopsy forceps head assembly comprises an outer tube with an opening in the tail end, a traction wire is movably arranged in the outer tube in a drawing mode, and the biopsy forceps head assembly further comprises two forceps mouths which are oppositely arranged and can be opened or closed; and the bearing plate is movably arranged in the outer pipe and can move in the axial direction of the outer pipe, and the two clamp mouths are installed on the bearing plate through a swing assembly. According to the biopsy forceps head assembly passing through the bronchoscope, a lung cancer tumor tissue sample can be rapidly clamped through opening and closing of the forceps mouth, and after sampling, the forceps mouth and the sample can be retracted into the outer tube together, so that the sample is prevented from being polluted in the transfer process, and the accuracy of pathological diagnosis is ensured.