Abstract: A puncturing device and an anchoring device, the puncturing device including: a puncturing needle, an inflatable anchoring balloon, and a catheter which passes through a proximal end and distal end of the anchoring balloon, the puncturing needle being movably accommodated within the catheter; in a filled state, a central area of an end portion of the distal end of the anchoring balloon is depressed towards the proximal end to form a depressed area, and a distal end of the catheter is located within the depressed area. The anchoring device includes the anchoring balloon and the catheter. The puncturing device may improve the accuracy and success rate of puncturing, and after puncturing is complete, an expansion balloon may be transported along a guide wire to expand a puncturing opening by simply withdrawing the puncturing needle and a push rod.

Abstract: A steerable catheter suitable for left-hand operation includes a tube, a handle assembly, and a Luer connector. The handle assembly comprises a holding handle, a slide mechanism, and a slide control mechanism; a proximal end of the tube passes through a cavity of the holding handle to be connected with the Luer connector; the slide mechanism comprises a slide base body, and a slide member axially sliding along the holding handle and fitted on the slide base body; the slide member is fixedly connected to a pull wire; the slide control mechanism comprises a connecting member connected with the slide member, and a drive adjustment member connected with the connecting member and adjusting the position of the slide member; the drive adjustment member is provided at the proximal end of the holding handle for convenient left hand operation.

Abstract: A verification method of an allelopathic inhibition mechanism based on ecological stoichiometric equilibrium interference is disclosed. By taking ecological stoichiometric characteristics and growth characteristics of Phalaris arundinacea under an equilibrium state as a control, a relative coefficient of variation (RCv) is used to characterize an interference intensity of different intensities of allelopathic stress on ecological stoichiometric equilibrium of the P. arundinacea and an inhibitory intensity of different intensities of allelopathic stress on growth of the P. arundinacea. Then, through correlation analysis among parameters including the intensity of the allelopathic stress, the ecological stoichiometric equilibrium interference, and growth inhibition, a method is provided to verify whether a new mechanism of allelopathic inhibition based on the ecological stoichiometric equilibrium interference exists.

Abstract: A verification method of an allelopathic inhibition mechanism based on ecological stoichiometric equilibrium interference is disclosed. By taking ecological stoichiometric characteristics and growth characteristics of Phalaris arundinacea under an equilibrium state as a control, a relative coefficient of variation (RCv) is used to characterize an interference intensity of different intensities of allelopathic stress on ecological stoichiometric equilibrium of the P. arundinacea and an inhibitory intensity of different intensities of allelopathic stress on growth of the P. arundinacea. Then, through correlation analysis among parameters including the intensity of the allelopathic stress, the ecological stoichiometric equilibrium interference, and growth inhibition, a method is provided to verify whether a new mechanism of allelopathic inhibition based on the ecological stoichiometric equilibrium interference exists.

Abstract: A puncturing device and an anchoring device, the puncturing device including: a puncturing needle, an inflatable anchoring balloon, and a catheter which passes through a proximal end and distal end of the anchoring balloon, the puncturing needle being movably accommodated within the catheter; in a filled state, a central area of an end portion of the distal end of the anchoring balloon is depressed towards the proximal end to form a depressed area, and a distal end of the catheter is located within the depressed area. The anchoring device includes the anchoring balloon and the catheter. The puncturing device may improve the accuracy and success rate of puncturing, and after puncturing is complete, an expansion balloon may be transported along a guide wire to expand a puncturing opening by simply withdrawing the puncturing needle and a push rod.

Abstract: A puncturing device and an anchoring device, the puncturing device including: a puncturing needle, an inflatable anchoring balloon, and a catheter which passes through a proximal end and distal end of the anchoring balloon, the puncturing needle being movably accommodated within the catheter; in a filled state, a central area of an end portion of the distal end of the anchoring balloon is depressed towards the proximal end to form a depressed area, and a distal end of the catheter is located within the depressed area. The anchoring device includes the anchoring balloon and the catheter. The puncturing device may improve the accuracy and success rate of puncturing, and after puncturing is complete, an expansion balloon may be transported along a guide wire to expand a puncturing opening by simply withdrawing the puncturing needle and a push rod.

Abstract: A steerable catheter suitable for left-hand operation includes a tube, a handle assembly, and a Luer connector. The handle assembly comprises a holding handle, a slide mechanism, and a slide control mechanism; a proximal end of the tube passes through a cavity of the holding handle to be connected with the Luer connector; the slide mechanism comprises a slide base body, and a slide member axially sliding along the holding handle and fitted on the slide base body; the slide member is fixedly connected to a pull wire; the slide control mechanism comprises a connecting member connected with the slide member, and a drive adjustment member connected with the connecting member and adjusting the position of the slide member; the drive adjustment member is provided at the proximal end of the holding handle for convenient left hand operation.

Abstract: A plastic covered stent for aortic dissection and an aortic dissection stent are disclosed. The plastic covered stent for aortic dissection includes a tubular membrane and multiple annular stents sequentially sutured on the membrane along an axial direction. Part of the annular stents on the membrane are semi-suture stents. Each semi-suture stent has non-suture zones separable from the membrane. When the plastic covered stent is bent, the membrane corresponding to the non-suture zones at an inner bending side of the plastic covered stent is separated from the semi-suture stents and folded inwardly. The semi-suture stents are distributed on a bending portion of the plastic covered stent for aortic dissection after being implanted.

Abstract: An aortic bare stent and an aortic dissection stent are disclosed. The aortic bare stent is in a tubular net structure, with multiple support stents in circles and arranged along an axial direction. Two adjacent support stents are connected by a connector stent. The connector stent is made of a hyper-elastic material. A flexural rigidity of the connector stent is less than that of the support stent. The support stent is made of a single-strand hyper-elastic nickel titanium wire or formed by cutting a nickel titanium tubing. The connector stent is made of a multi-strand composite wire. The multi-strand composite wire is formed by twisting or weaving multiple strands of filaments, and each strand of filament is independently of a nickel titanium material.

Abstract: A puncturing device and an anchoring device, the puncturing device including: a puncturing needle, an inflatable anchoring balloon, and a catheter which passes through a proximal end and distal end of the anchoring balloon, the puncturing needle being movably accommodated within the catheter; in a filled state, a central area of an end portion of the distal end of the anchoring balloon is depressed towards the proximal end to form a depressed area, and a distal end of the catheter is located within the depressed area. The anchoring device includes the anchoring balloon and the catheter. The puncturing device may improve the accuracy and success rate of puncturing, and after puncturing is complete, an expansion balloon may be transported along a guide wire to expand a puncturing opening by simply withdrawing the puncturing needle and a push rod.

Abstract: This present invention provides an automatic pot seedlings feeding mechanism for semi-automatic transplanter, comprising a transmission mechanism, a slider-crank mechanism, a stop lever, a side plate, a resetting mechanism and a bearing with bearing support. The transmission mechanism includes a transmission shaft I, a driving wheel, a transmission shaft II, a transmission shaft III and a conveyor belt. Under the performance of the conveyor belt, the pot seedlings are transported forward to the position of the stop lever. The slider-crank mechanism comprises a crank, a slider bar and a sliding chute, the crank and the driving wheel are connected through a revolute pair A, which is on the driving wheel, but not at the center of the driving wheel. The slider is securely connected with the resetting mechanism.

Abstract: A plastic covered stent for aortic dissection and an aortic dissection stent are disclosed. The plastic covered stent for aortic dissection includes a tubular membrane and multiple annular stents sequentially sutured on the membrane along an axial direction. Part of the annular stents on the membrane are semi-suture stents. Each semi-suture stent has non-suture zones separable from the membrane. When the plastic covered stent is bent, the membrane corresponding to the non-suture zones at an inner bending side of the plastic covered stent is separated from the semi-suture stents and folded inwardly. The semi-suture stents are distributed on a bending portion of the plastic covered stent for aortic dissection after being implanted.

Abstract: An aortic bare stent and an aortic dissection stent are disclosed. The aortic bare stent is in a tubular net structure, with multiple support stents in circles and arranged along an axial direction. Two adjacent support stents are connected by a connector stent. The connector stent is made of a hyper-elastic material. A flexural rigidity of the connector stent is less than that of the support stent. The support stent is made of a single-strand hyper-elastic nickel titanium wire or formed by cutting a nickel titanium tubing. The connector stent is made of a multi-strand composite wire. The multi-strand composite wire is formed by twisting or weaving multiple strands of filaments, and each strand of filament is independently of a nickel titanium material.

Abstract: 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).

Abstract: This present invention provides an automatic pot seedlings feeding mechanism for semi-automatic transplanter, comprising a transmission mechanism, a slider-crank mechanism, a stop lever, a side plate, a resetting mechanism and a bearing with bearing support. The transmission mechanism includes a transmission shaft I, a driving wheel, a transmission shaft II, a transmission shaft III and a conveyor belt. Under the performance of the conveyor belt, the pot seedlings are transported forward to the position of the stop lever. The slider-crank mechanism comprises a crank, a slider bar and a sliding chute, the crank and the driving wheel are connected through a revolute pair A, which is on the driving wheel, but not at the center of the driving wheel. The slider is securely connected with the resetting mechanism.

Abstract: 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).