Covidien LP

Yanli Wan

Xiliang Zhang

Yanjun Jiao

Yishuai Xu

Jinhang Liu

Zhaokai Wang

Xiucheng Shen

A circular stapling device () includes a handle assembly () having an indicator assembly () that includes a clicker assembly () and a biasing member (). The clicker assembly () provides an audible and/or tactile signal to a clinician when an anvil assembly () of the stapling device () is moved from a clamped position towards an open position a distance sufficient to allow an anvil head () of the anvil assembly () to pivot in relation to a reload assembly () of the stapling device () from an operative position to a tilted reduced profile position. The signal is provided to the clinician while the anvil assembly () is locked onto the stapling device ().

Surgical stapling device with anvil tilt indicator

An anvil and delivery system assembly includes an anvil and a delivery system assembly. The delivery system includes a flexible guide member, an adapter, a tie down suture, and a retaining suture. The guide member is coupled to the center rod with the adapter. The tie down suture is secured to the adapter and to the anvil head to retain the anvil head in the tilted position during anvil delivery. The retaining suture is coupled to the anvil head via the tie down suture such that release of the tie down suture automatically releases the retaining suture from the anvil head.

Anvil and delivery system assembly with automatic retaining suture release

A powered circular stapling device () includes a transfer switch assembly () for a transmission assembly () to selectively direct power between clamping and firing mechanisms of the stapling device (). The transfer switch assembly () includes a carriage (), a worm gear assembly (), and first and second biasing mechanisms (). The worm gear assembly () is supported on the carriage () and movable in relation to the carriage () to allow the worm gear assembly () to engage with a first or second gear () of the transmission assembly (). The biasing mechanisms () allow the worm gear assembly () to move in relation to the carriage () when the gear teeth of the worm gear () are misaligned with the gear teeth of one of the first and second gears () of the transmission assembly (), to allow the gear teeth of the worm gear () to move into alignment with the gear teeth of the other one of the first and second gears () of the transmission assembly ().

Growing community of inventors

Shanghai, China

Yanli Wan