Microvascular anastomosis at 30-50× magnifications (super-microvascular anastomosis) in neurosurgery. 2011

Nobuhisa Matsumura, and Nakamasa Hayashi, and Hironaga Kamiyama, and Michiya Kubo, and Takashi Shibata, and Soushi Okamoto, and Yukio Horie, and Hideo Hamada, and Shunro Endo
Department of Neurosurgery, Stroke Center, Saiseikai Toyama Hospital, Kusunoki 33-1, Toyama, 931-8533, Japan.

BACKGROUND We report a safe and precise technique of microvascular anastomosis at higher magnifications (30 - 50 ×) in neurosurgery and evaluate our experiences to examine the utility of this method for cerebral revascularization in various situations. METHODS A retrospective review was carried out of patients who underwent microvascular anastomosis using a high-magnified operating microscope. This method was performed in 30 patients with 35 microvascular anastomoses in various situations. This microscope has two optical systems, a standard zooming system and a newly developed high magnification system. High resolution and good depth of focus are achieved by a new lens design in the optical system, which makes the image of the object very clear at higher magnifications. In this operating microscope, the combination of a 10 × eyepiece and the 200, 250, and 300-mm objective lens enables a range of final magnifications from 2.9 × to 50.4 ×. RESULTS This method enabled one to pay attention to performing atraumatic manipulations of small vessels and correct suturing, intima-to-intima, of vessel walls. Microvascular anastomoses were performed safely and precisely at higher magnifications. All anastomoses were patent. CONCLUSIONS It is obvious that practical final magnifications of more than 30 × in neurosurgery would be super-magnified operative views. Microvascular anastomosis at 30 - 50 × magnifications (super-microvascular anastomosis) can help neurosurgeons to improve their skills, with good visualization, and to be safe and accurate when conducting cerebral revascularization in various situations.

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