Identification and control of a multiplace hyperbaric chamber.Gracia L, Perez-Vidal C, de Paco JM, de Paco LM.PLoS One. 2018 Aug 3;13(8):e0200407. 

Proof of concept study using a modified Politzer inflation device as a rescue modality for treating Eustachian tube dysfunction during hyperbaric oxygen treatment in a multiplace (Class A) chamber.O'Neill OJ, Smykowski E, Marker JA, Perez L, Gurash S, Sullivan J.Undersea Hyperb Med. 2019 Jan-Feb;46(1):55-61

The Hyperbaric Protective Tube: A housing for a left ventricular assist device (LVAD) in a multiplace hyperbaric chamber.Kot J, Siondalski P, Lenkiewicz E.Diving Hyperb Med. 2019 Jun 30;49(2):137-140.