AngGSOngJMEkeT. Face-to-face seated positioning for phacoemulsification in patients unable to lie flat for cataract surgery. Am J Ophthalmol. 2006, 141: 1151–2.
2.
FineIHHoffmanRS. Phacoemulsification performed in a modified waiting room chair. J Cataract Refract Surg. 1996, 22: 1408–10.
3.
PohlACullenDJ. Cerebral ischemia during shoulder surgery in the upright position: a case series. J Clin Anesth. 2005, 17: 463–9.
4.
YadeauJTLiuSS. Cerebral oximetry desaturation during shoulder surgery performed in a sitting position under regional anesthesia. Can J Anaesth. 2011, 58: 986–92.