Hangzhou Valgen Medtech Co., Ltd.

Hangzhou Weiqiang Medical Technology Co., Ltd.

Lifetech Scientific (shenzhen) Co., Ltd

Hangzhou Nuomao Medtech Co., Ltd.

Hangzhou Nuo Cheng Medical Instrument Co., Ltd.

Hangzhou Endonom Medtech Co. Ltd.

Hangzhou Nuo Mao Medical Technology Co., Ltd

Hangzhou Dinova Ep Technology Co., Ltd.

Lifetech Scientific Co., Ltd.

Tingchao Zhang

Weiwei Zhang

Xianzhang Zheng

Yang Li

Chunyuan Zhou

Yongsheng Wang

Weiguo Fu

Hui Zhang

Zhenjun Zi

Jianmin Li

Liwen Liu

Xinjiong Qiu

Bobo Peng

Gang Wang

Deyuan Zhang

Jing Li

Wei Jiang

Mingyang Cai

Zehan Zhang

Quanjie Jiang

Shanfeng Hu

Xiongzhi Wang

Zetao Wang

Weilin Liang

Daoyang Liu

Jian'an Wang

Xianbao Liu

Qiao Huang

A method and apparatus for controlling output of radio frequency ablation power, and a radio frequency ablation system. The method for controlling output of radio frequency ablation power comprises: when a starting signal is received, controlling a radio frequency energy generator to output a preset ablation power, recording ablation time, and acquiring an actual ablation parameter (), wherein the actual ablation parameter comprises the actual impedance; when the actual impedance meets any one of a first preset condition and a second preset condition, controlling the radio frequency energy generator to suspend output of the ablation power, recording sleep time, and suspending recording of the ablation time (); and if the sleep time exceeds a sleep time threshold value, controlling the radio frequency energy generator again to continue to output the ablation power, and continuing to record the ablation time (), wherein the first preset condition is: R>K×Rmin, and the second preset condition is: R>K×Rmin. According to the method, the impedance of an ablation part is enabled to be in an intermittent stably-changing state, and continuous output of radio frequency energy can be ensured, such that radio frequency ablation is relatively uniformly performed in a cyclic manner.

Method and device for controlling output of radiofrequency ablation power, and radiofrequency ablation system

A forward-pushing release type suture locking device configured to fix a suture in a locking pin includes a collet and a thrust rod assembly sleeved outside the collet. The thrust rod assembly includes a thrust rod. A recessed portion is arranged at the thrust rod, and a protruding portion corresponding to the recessed portion is arranged at the collet. In a process that the thrust rod continuously moves distally in an axial direction, the thrust rod first pushes against a gradually raised side of the protruded portion, so as to allow the collet to deform to compress the locking pin, and allow the locking pin compressed by the collet to deform and fix the suture; and then the protruding portion is gradually accommodated in the recessed portion, so that at least part of deformations of the collet is restored to release the locking pin.

Forward-pushing for releasing suture locking device

The application provides a valve clamping system. The valve clamping system includes a pushing device and a valve clip with coatings. The valve clip includes a push rod, the coatings, and a proximal clamping plate, and a distal clamping plate. The proximal clamping plate and the distal clamping plate extend radially outwardly relative to the push rod. The distal clamping plate is connected to the push rod. The proximal clamping plate is arranged between the push rod and the distal clamping plate. A valve holding space is formed between the proximal clamping plate and the distal clamping plate. The push rod is capable of driving the distal clamping plate to be expanded radially. The proximal clamping plate is capable of expanding toward the distal clamping plate by an elastic strain of the proximal clamping plate and is configured to clamp a valve tissue received in the valve holding space.

Valve clip with coatings and valve clamping system

An adjustable suture locking apparatus includes a lock pin, an outer tube, a handle, and an adjusting device. The lock pin is used to receive or fix a suture. The outer tube defines a receiving cavity. The lock pin is disposed at a distal end of the receiving cavity. The handle includes a fixing portion coupled to a proximal end of the outer tube. The adjusting device is disposed on the fixing portion. The adjusting device is coupled to a proximal end of the suture and operable to adjust tensioning or loosening of the suture.

Adjustable suture locking apparatus

An artificial chordae tendineae implantation system, including a clamping device, puncture device, a pushing device, and a clamp assistance device. The pushing device includes a pushing catheter. The puncture device and the clamping device respectively are movably insertedly mounted within the pushing catheter. An artificial chordae tendineae is accommodated in the clamping device. The clamp assistance device includes a clamp assistance arm movably insertedly mounted within the pushing catheter and a clamp assistance member provided at the distal end of the clamp assistance arm. The clamp assistant member is made of a flexible and/or soft material. The clamp assistance member and the clamp assistance arm are accommodated together in the pushing catheter. The clamp assistance arm pushes the clamp assistance member to pass out from the distal end of the pushing catheter or the distal end of the clamping device.

Artificial chordae tendineae implantation system and clamp aiding apparatus thereof

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.

Steerable catheter suitable for left-hand operation

An adjustable heart valve repair system includes a suture implanting apparatus and a suture locker. The suture implanting apparatus is operable to implant a suture into at least one leaflet of a heart valve. The suture locker is operable to fix the suture. The suture locker includes an adjusting device to adjust tensioning or loosening of the suture.

Adjustable heart valve repair system

An atrioventricular valve clamping device and an atrioventricular valve clamping system are provided in the disclosure. The atrioventricular valve clamping device includes a support member, an occluding member, and a clamping member. A direction of a central axis of the occluding member is regarded as a Z-direction, a direction parallel to a width direction of the clamping member and perpendicular to the Z-direction is regarded as a Y-direction, and a direction perpendicular to the Y-direction and the Z-direction is regarded as an X-direction. The support member has a length in the Z-direction. The occluding member is sleeved on the support member in the Z-direction. The clamping member is disposed outside the occluding member and configured to be unfolded or folded relative to the occluding member. The occluding member is resilient and has a three-dimensional shape.

Atrioventricular valve clamping device and atrioventricular valve clamping system

The present disclosure provides a heart valve repair method, comprising: advancing a distal end of a suture implanting apparatus from an outside of a body through a transapical approach into a left ventricle or a right ventricle of a heart; holding each leaflet of a heart valve with the distal end of the suture implanting apparatus; implanting at least one suture into the leaflet; withdrawing the suture implanting apparatus from the body; advancing a distal end of a suture locking apparatus from the outside of a body through a transapical approach into the corresponding left ventricle or the corresponding right ventricle; using the suture locking apparatus to lock the plurality of sutures; and withdrawing the suture locking apparatus from the body. The heart valve repair method has a simple surgical procedure, a low degree of patient trauma, and a high success rate of surgery.

Heart valve repair method

Disclosed is a balloon catheter () with a drug coating. The balloon catheter comprises a pushing catheter (), at least one expandable first balloon () located at a distal end of the pushing catheter (), and a pre-expansion mechanism. The first balloon () is fixedly arranged on the pushing catheter (). The pre-expansion mechanism () comprises an expansion sleeve () and a connector (). The expansion sleeve () is used for housing the first balloon () before the first balloon () is not expanded and when same is pre-expanded. The connector () is connected to the expansion sleeve () and axially moves with respect to the pushing catheter () after the first balloon () is pre-expanded, so that the first balloon () is exposed outside the expansion sleeve (). The balloon catheter () with a drug coating can effectively pre-expand a lesion location and can also effectively prevent the loss of a balloon with a drug coating during a delivery process, and is simple in terms of a surgical operation process.

Drug-coated balloon catheter

An artificial chordae tendineae implantation system includes a clamping device, a puncture device, a pushing device, and a detection device. The pushing device includes a pushing shaft. The clamping device includes a clamping push rod that receives an artificial chorda tendineae, and a distal clamp and a proximal clamp for cooperatively clamping a valve leaflet. The detection device includes one probe that is movably disposed in the pushing shaft. A probe outlet is provided at one of a clamping surface of the proximal clamp and a clamping surface of the distal clamp, and a probe accommodation chamber corresponding to the probe outlet is provided at the other one. When the clamping device is closed, the distal end of the probe protrudes from the probe outlet and is accommodated in the probe accommodation chamber, and whether the valve leaflet is clamped is detected.

Artificial chordae tendineae implantation system

An artificial chordae tendineae includes a chordae tendineae main body with at least one end connected to a fixing member. A side of the fixing member facing away from the chordae tendineae main body is provided with a puncturing connection member. An artificial chordae tendineae implantion system includes a clamping device, a puncturing device including a puncture needle, the artificial chordae tendineae, and a pushing device including a pushing shaft. The puncturing device and the clamping device are received in the pushing shaft. A proximal clamp of the clamping device is provided at a distal end of the pushing shaft. A distal clamp of the clamping device is provided at a distal end of the clamping push rod. A distal end of the puncture needle is provided with a tapped straight tip. The artificial chordae tendineae is received in the clamping device. The fixing member corresponds to the puncture needle.

Artificial chordae tendineae and artificial chordae tendineae implantation system

The self-centering inferior vena cava filter is provided, which includes a filter portion, a support portion, and a retrieval portion. The filter portion is configured to filter thrombi and includes at least two layers of filter members extending along a central axis of the self-centering inferior vena cava filter, the at least two layers of filter members are adjacent to each other and staggered around the central axis. The support portion is configured to prevent the self-centering inferior vena cava filter from tilting, and extends outwardly radially from a center point of the support portion in a direction close to the filter portion and then curls inwardly radially in a direction away from the filter portion, and is supported on a blood vessel wall by point contact. The retrieval portion is connected with at least one of the filter portion and the support portion.

Self-centering inferior vena cava filter

An interventional medical device delivery system comprises a loader provided with a loading tube, a delivery sheath, a dilator, a pushing component, and a hemostasis valve. The loading tube or the delivery sheath is provided with a position-limiting locking connector. An appropriate-rotation control mechanism for controlling a tightening degree between a distal end of the loading tube and a proximal end of the delivery sheath is disposed outside the loading tube or the delivery sheath. The proximal end of the delivery sheath and the distal end of the loading tube engage with each other in a sealed manner, and are threadingly fixed to each other by means of the position-limiting locking connector. The appropriate-rotation control mechanism rotates in one direction to appropriately tighten a thread-connection, and rotates in the opposite direction to release the thread-connection. The interventional medical device conveying system of the invention automatically determines a tightening degree.

Growing community of inventors

Zhejiang, China

Tingchao Zhang