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Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-11-09

The present invention relates to an implant conveying device, comprising a pusher (20), a control component (21), a connecting wire (11) and a control wire (4). The pusher (20), of which one end is connected to the control component (21), is provided with a tube cavity (6) and a lock hole (7) communicated with the tube cavity. One end of the control wire (4) is connected to the control component (21), and the other end thereof is driven by the control component to be movably accommodated in the tube cavity (6) of the pusher. One end of the connecting wire (11) is connected to the pusher (20) or to the control component (21), and the other end thereof is used for passing through an implant (1) and then entering the lock hole (7). The control wire (4) is driven by the control component (21) to pass through the connecting wire (11) to connect the implant (1) and the conveying device, or the control wire (4) is driven by the control component (21) to be disengaged from the connecting wire (11) to release the implant (1). By means of the conveying device, locking rings on instruments are removed, so that no redundant metal remains after the implant is implanted into the human body.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-11-02

The present invention relates to a drug coated balloon catheter, comprising a balloon and a drug coating covering the surface of the balloon; the drug coating comprises an active drug and a carrier; the active drug is paclitaxel, rapamycin, a paclitaxel derivative or rapamycin derivative; the carrier comprises an organic acid salt and polyalcohol; a mass ratio of the active drug to the carrier in the drug coating is 0.2 to 100, and a mass ratio of the organic acid salt to the polyalcohol is (0.2 to 5): 1. The organic acid salt and the polyalcohol in the drug coating jointly take effect to prevent the premature release of drugs before the balloon catheter is positioned at a target site, and to promote the drugs being quickly released from the surface of the balloon and absorbed by the target tissue, thus reducing drug loss during transmission, and also having a better drug transfer effect.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-09-07

The invention discloses an absorbable iron-based alloy stent, comprising an iron-based alloy substrate and a degradable polyester in contact with the surface of the substrate, in which the degradable polyester has a weight average molecular weight of between 20,000 and 1,000,000 and a polydispersity index of between 1.2 and 30. With the degradable polyester, the iron-based alloy is capable of corroding rapidly and controllably within a predetermined period. Following implantation into the human body, the degradable stent serves as a mechanical support at early stage, then gradually degrading and being metabolized and absorbed by the human body. During the process of degradation, minimal or no solid product is produced. Ultimately, the configuration of the lumen with an implanted stent as well as the systolic and diastolic functions thereof return to their natural states.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-09-07

The invention discloses an absorbable iron alloy stent, comprising an iron alloy substrate and a degradable polymer in contact with the surface of the substrate, in which the degradable polymer has a weight average molecular weight of more than or equal to 20,000 and less than or equal to 1,000,000 and a polydispersity index of more than 1.0 and less than or equal to 50. After the iron alloy stent is implanted into the body, the degradable polymer degrades to produce a carboxyl group. After the degradable stent is implanted into the human body, the effects of oxygen-consuming corrosion enable the stent both to mainly function as a mechanical support and then to degrade gradually, and the amount of hydrogen produced in the degradation process does not reach the level that can lead to a risk of air embolism.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-04-13

Disclosed is a manufacturing method of an iron-based alloy medical apparatus, comprising: nitriding the iron-based alloy preformed unit at 350-550C for 30- 100 minutes; and ion etching the iron-based alloy preformed unit with an ion etching time of 80-110% of the nitriding time. Ion nitriding and ion etching can be performed in situ in the same equipment using this manufacture method with high production efficiency, and in the ion nitriding and ion etching process, nitrogen atoms continuously permeate the preformed unit, making the time it takes for the medical apparatus to be absorbed by the human body and both the hardness and strength of the instrument surface achieve requirements.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-10-05

The present invention relates to a thoracic aortic covered stent (100), comprising a bare stent segment (110) and a covered stent segment (120). The bare stent segment (110) comprises a bare wave-shaped ring (111); the covered stent segment (120) has a lesser curvature side region (100c), a greater curvature side region (100a), and two opposite intermediate regions (100b) located between the lesser curvature side region (100c) and the greater curvature side region (100a) respectively; and the covered stent segment (120) comprises a first proximal wave-shaped ring (121). The stent (100) further comprises a first connecting member (131), a first side connecting member (132) and a second side connecting member (133) all connected to the bare wave-shaped ring (111) and the first proximal wave-shaped ring (121), wherein the first connecting member (131) is arranged in the lesser curvature side region (100c), and the first side connecting member (132) and the second side connecting member (133) are arranged in the two intermediate regions (100b) respectively. The stent (100) when located near the lesser curvature side (22) with a relatively small radius of curvature has a connecting assembly rigidly connecting the bare stent segment (110) and the covered stent segment (120), and through the constraints thereof, the bare stent segment (110) can be effectively prevented from overturning towards the vessel wall during the release process, so that the proximal end of the covered stent segment (120) is securely apposed to the wall, thereby avoiding the turnover effect.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-09-28

The present invention relates to a left atrial appendage occluder (10), comprising a sealing disc (100) and a fixing bracket (200) which is connected to the sealing disc (100) and located at one side of the sealing disc (100); the fixing bracket (200) comprising a connecting portion (210) connected to the sealing disc (100), and a plurality of supports (220); after radiating out distally from the connecting portion (210) and coordinating to form a recessed area (221), the plurality of supports (220) are bent to extend proximally to form a plurality of spaced suspended supporting segments (222), the supporting segment (222) being provided with at least one anchoring barb (223) facing the sealing disc (100). The left atrial appendage occluder (10) further comprises a thin film (300), all the supports (220) being connected in series through the thin film (300). The present invention effectively restrains the relative position and relative movement between the supporting segments (222) through the thin film (300), thus avoiding twisting of the supporting segments (222) when the fixing bracket (200) is pushed out and released from a delivery sheath.


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-11-02

The present invention relates to a steerable sheath tube (100) including a tube body (110), a traction mechanism (120) and a fixing and connecting mechanism (130). The traction mechanism (120) includes an anchor ring (121) and a traction wire (122). The anchor ring (121) is coaxially embedded in a distal elastic segment (111) of the tube body (110). The traction wire (122) is arranged in a side wall of the tube body (110), and extends along the axial direction of the tube body (110). The traction wire (122) includes a first segment and a second segment connected to each other, wherein the first segment is connected to the fixing and connecting mechanism (130) near a proximal end of the tube body (110), and the second segment hooks the anchor ring (121).


Patent
Lifetech Scientific Shenzhen Co. | Date: 2016-11-09

The present invention provides an aortic arch intraoperative stent, wherein the aortic arch intraoperative stent comprising a main body (17) and one to three branches (5, 6, 7). The aortic arch intraoperative stent connects several circular waveform rings together via a cover membrane (25) to form the main body (17) and the branches (5, 6, 7), wherein each circular waveform ring comprises a circular elastic wire formed through head-to-tail connection. In addition, the present invention also provides a manufacturing method for the aortic arch intraoperative stent, comprising the following steps of: providing a cover membrane mandrel (40); making an inner membrane; assembling circular waveform rings; making an outer membrane; suturing a proximal fabric (12); and suturing a distal fabric (13). The aortic arch intraoperative stent can automatically adapt to the vascular structure near the aortic arch of different patients, and the main body (17) in the aortic arch intraoperative stent maintains a sufficient radial support for the branches, thereby ensuring that the branches on the aortic arch intraoperative stent may safely enter branch vessels during surgery, and preventing the branches from slipping out of the corresponding branch vessels during and after surgery at the same time.


Disclosed is a medical instrument coating, being coated on the surface of a nickel-titanium alloy component of a medical instrument. The medical instrument coating comprises an elementary copper phase, an amorphous titanium-containing substance and a transition layer comprising a copper-nickel intermetallic phase. Also mentioned is a preparation method for the medical instrument coating. A medical instrument comprising a copper-titanium coating has good blood compatibility, and simultaneously can inhibit the endothelialization of the medical instrument surface, thereby improving the recovery rate of the medical instrument and prolonging the recovery time window; the copper-titanium coating belongs to the group of metal composite coatings, has a certain toughness and ductility, and avoids the large-amplitude deformation process of the medical instrument damaging the coating; and the mechanical property and the coating quality of the medical instrument comprising a fine nickel-titanium alloy component are guaranteed by the method for preparing the coating.

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