Study on development of needle scope system for the arthroscopic sorgery of the temporomandibular joint.

We have been studying applicational arthroscopic surgery for temporomandibular联合疾病自1974.这方面的研究，我们已经开发了一个新的外科手术设计系统。prototype has an external diameter of 1.7 mm. The angle of vision is 60 in air and 45 in water.effective length with The outer cannula set on is either 90mm or 50mm . The most importantachievement of this device is that it enables the usage of two types of different-sized outercannula in the same arthroscope：a round single-lumen outer cannula (external diameter 2.0 mm) and an oval double-lumen outer cannula（3.8x 2.0）. The single-lumen outer cannula can ily be replaced with The double-lumen outercannula by using an internal guiding needle. this device can be used only for diagnosticarthroscopy but also for arthroscopic surgery.In particular，这是一个外科手术设备存储，这是一个可以使用的平行设备存储。easy to always observe the advancing edge of surgicaldevice and the manipvlation can therefore begreatly improved。

We have been studying applicational arthroscopic surgery for temporomandibular joint diseases since 1974. And through this study we have develoved a newly designed system of surgical arthroscopy.this prototype has an external diameter of 1.7 mm. The angle of vision is 60゜ in air and 45゜ in water. The effective length with the outer cannula set on is either 90 mm or 50 mm. The most important achievement of this device is that it enables the usage of two types of different-sized outer cannula in the same arthroscope: a round single-lumen outer cannula (external diameter 2.0 mm) and an oval double-lumen outer cannula (3.8x 2.0). The single-lumen outer cannula can easily be replaced with the double-lumen outer cannula by using an internal guiding needle. this device can be used not only for diagnostic arthroscopy but also for arthroscopic surgery.In particular, it has a hole for surgical device insertion which enable parallel insertion of device. This makes it easy to always observe the advancing edge of surgicaldevice and the manipvlation can therefore be greatly improved.