| 摘要 |
This invention refers to an improved instrument for implanting bioprotheses (CR) in cardio-surgery, comprising an expandable member (18) essentially in the shape of a molar tooth that, in the expanded state, keeps spaced apart the threads (FL) utilized for sewing the bioprothesis in place, while the bioprothesis (CR) is introduced into the patient heart (CC). This avoids that the threads (FL) get hooked to a part of the bioprothesis base (BA) that is usually made from a synthetic material rather rough. The expandable member in the not-expanded state allows the bioprothesis (CR) to be easily placed and removed from the supporting head (23) of the instrument. Furthermore the position of the supporting head (23) is adjustable in order to fit the axial dimensions of the bioprotheses (CR) which vary over a wide range. |
