公开(公告)号：US4658817A

公开(公告)日：1987-04-21

申请号：US718069

申请日：1985-04-01

Applicant: Roger I. Hardy

Inventor： Roger I. Hardy

IPC: A61B17/00 ,  A61B18/20 ,  A61B18/24 ,  A61B19/00 ,  A61B17/36

CPC classification number: A61B18/201 ,  A61B18/245 ,  A61B2017/00247 ,  A61B2018/00392 ,  A61B2090/036

Abstract: A surgical carbon dioxide laser is disclosed which includes a handpiece for directing a laser beam to a desired location. Mounted on the forward end of the handpiece is a hollow needle precisely aligned along the laser path. This permits the laser to be used in surgical applications where the needle perforates a porton of tissue to provide the laser beam direct access to distal tissue. The needle is mounted to the handpiece in a manner which provides for forward and lateral adjustment of the needle relative to the laser beam path which insures co-axiality between the laser beam and the needle lumen. This is crucial for the safe use of the laser. The needle is adjusted such that the focal point of the laser beam is approximately at the tip of the needle. This provides maximum energy at the tip of the needle where it is required. This apparatus is particularly useful in transmyocardial devices utilized to provide ischemic endocardial tissue direct access to blood within the ventricular cavity. The device is inserted within the epicardium of the heart; the laser is then activated to vaporize a channel of tissue through the endocardium. This provides for perforation of the endocardium with minimal damage to the epicardium.

Abstract translation: 公开了一种外科二氧化碳激光器，其包括用于将激光束引导到期望位置的手持件。 安装在手持件的前端上的是沿着激光路径精确对准的中空针头。 这允许激光被用于外科应用，其中针穿孔组织的端口以提供激光束直接进入远端组织。 针以提供相对于激光束路径的针的前向和横向调节的方式安装到手持件上，其确保激光束和针内腔之间的同轴度。 这对于激光的安全使用至关重要。 调整针，使得激光束的焦点大致位于针的尖端。 这在需要的针的尖端处提供最大的能量。 该装置在用于提供缺血性心内膜组织直接进入心室内的血液的心肌内装置中特别有用。 该装置插入心脏的心外膜; 然后激活激光以通过心内膜蒸发组织通道。 这提供了对心外膜的穿孔，对心外膜的损伤最小。