Herein we compare the effects of perturbations in the Kölliker-Fuse nucleus (KFN) and the lateral (LPBN) and medial (MPBN) parabrachial nuclei on the coordination of breathing and swallowing. Cannula was chronically implanted in goats through which ibotenic acid (IA) was injected while awake. Swallows in late expiration (E) always reset while swallows in early inspiration (I) never reset the re...

During noninvasive bilevel positive airway pressure (BiPAP) ventilation it is found that several times patients are unable to maintain oxygen saturation and develop breathing difficulty despite its high setting and high oxygen flow, further management requires invasive positive pressure mechanical ventilation. Increasing oxygen concentration inside the BiPAP mask using nasal cannula with additi...

PURPOSE Valved cannulas are a recent addition to small-gauge pars plana vitrectomy (PPV) and provide stable intraocular fluidics. The goal of this study was to compare outcomes and postoperative complication rates of valved vs nonvalved cannula small-gauge PPV for repair of retinal detachments (RDs) complicated by Grade C proliferative vitreoretinopathy (PVR). METHODS A retrospective chart re...

In a prospective observational study we compared the results of 297 elective tracheostomies under jet-ventilation with regard to its complication rate and practicability. Of those, 156 patients underwent surgically created tracheostomy (SCT) and 141 patients percutaneous dilational tracheostomy (PDT). Initially, in 159 patients jet-ventilation was performed using a jet-cannula inserted intratra...

A new optical pressure transducer system (Viggo) has been assessed and compared with a standard P10 transducer (Spectramed) using a similar 20-gauge cannula, both in vitro in terms of linearity and frequency response and in vivo using an animal model. The linearity of the transducers was comparable; the resonant frequencies were 106 Hz and 75 Hz, respectively. However, the resonant frequency of...

1. Certain digestive and metabolic criteria were examined in mature wethers before and following (1) a simple exploratory laporotomy (two sheep), (2) establishment of a rumen cannula plus simple ('T'-shaped) cannulas in the duodenum and ileum (six sheep), (3) establishment of a rumen cannula plus two cannulas in the caecum (four sheep), (4) establishment of a rumen cannula plus re-entrant cannu...

BACKGROUND Adipose tissue is a source of stromal and vascular cells suitable for regenerative medical applications. Cell recovery depends on several factors, including the characteristics of the cannula used to harvest tissue. OBJECTIVES The authors assess whether aspiration of superficial layers of adipose tissue performed with a microcannula, rather than a standard cannula, allows for impro...

Osmoreceptors in the upper small bowel may delay gastric emptying by inhibiting fundal tone and/or by increasing outflow resistances. In this study we examined the contribution of postpyloric resistances to this braking system. Seven dogs had gastric emptying of 250 ml 15% dextrose, labelled with 99mTc-DTPA, measured by gamma camera imaging (preoperative studies: n = 21). A proximal duodenal ca...

Humification of oxygen prior to administration by nasal cannula is an expensive practice which has been justified on the basis that it improves the comfort of patients receiving supplemental oxygen therapy. Routine humidification of low-flow oxygen (less than or equal to 4 L/min) delivered by nasal cannula has recently been challenged based on theoretic grounds and on the results of a clinical ...

We describe a minimally invasive arthroscopic technique for anterior diskectomy of the cervical spine. Fingertip pressure is applied between the carotid sheath laterally and the pharynx medially. The trachea and esophagus are displaced to the contralateral side. The disk level, soft-tissue thickness, and midline are verified with image intensification. A spinal needle is inserted through the so...