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. 2021 Feb;44(1):619-624.
doi: 10.1007/s10143-020-01237-y. Epub 2020 Jan 11.

A novel omnidirectional tin-alloyed ring retractor for craniotomy in neurosurgery: technical note

Bikei Ryu  1   2   3 , Shinsuke Sato  4   5 , Tatsuya Inoue  5 , Takakazu Kawamata  6 , Yoshikazu Okada  4
Affiliations

A novel omnidirectional tin-alloyed ring retractor for craniotomy in neurosurgery: technical note

Bikei Ryu et al. Neurosurg Rev. 2021 Feb.

Abstract

In neurosurgical operations, proper craniotomy using retractors is necessary. Various surgical instruments are used for this purpose, including standard retractors and multipurpose head frame retractor systems. However, the conventional multipurpose head frame system is often not optimal for use in some craniotomies and postures because of its size and complexity of setting. We have invented a new omnidirectional tin-alloyed (ODT) ring retractor for craniotomy with malleability and shape memory characteristics to resolve these issues. It is principally elliptical in shape, approximately 30 × 20 cm in diameter, and sufficiently firm. Accordingly, this ODT ring can retract the surgical field in all directions. Here, we report our experiences of 281 neurosurgical craniotomies using this ODT ring retractor system in various craniotomy sites and postures. Our novel ODT ring retractor is useful because of its low profile, multidirectional retractability, and less obstructiveness with its malleability. It could be used with pediatric patients where strong traction is not desirable.

Keywords: Craniotomy; Device; Neurosurgery; Omnidirectional; Retractor; Technique.

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