PURPOSE To describe a noninvasive instrument that estimates intraocular pressure during episodes of external globe compression and to demonstrate the accuracy and reliability of this device by comparing it to the intraocular pressures simultaneously and manometrically measured in cannulated eyes. METHODS A thin fluid-filled bladder was constructed from flexible and inelastic plastic sheeting ...

OBJECTIVE To study in swine the hemodynamic changes secondary to the use of stabilizers for off-pump coronary artery bypass graft surgeries by means of both a suction device "Octopus" and a compression device (Speroni). METHODS Ten swine underwent median sternotomy. Monitoring of ECG, continuous cardiac output, mean arterial pressure, mean pulmonary artery pressure, mean right and left atrial...

• Wakerlin and his associates have reported' 2 that chronic bilateral carotid sinus compression in dogs resulted in a sustained elevation of the mean arterial pressure. This finding was confirmed by Hawthorne and Gaspar, who reported also that the elevated mean arterial pressure after bilateral carotid sinus compression was ameliorated by hypophysectomy. Kezdi reported that bilateral constricti...

• Wakerlin and his associates have reported' 2 that chronic bilateral carotid sinus compression in dogs resulted in a sustained elevation of the mean arterial pressure. This finding was confirmed by Hawthorne and Gaspar, who reported also that the elevated mean arterial pressure after bilateral carotid sinus compression was ameliorated by hypophysectomy. Kezdi reported that bilateral constricti...

The rostral ventrolateral medulla (RVLM) is considered a major center for the regulation of sympathetic and cardiovascular activities. Several clinical studies have indicated a possible causal relationship between neurovascular contact of the left RVLM and essential hypertension, and some investigators have suggested that the left RVLM is more sensitive to pulsatile compression than the right R...

In this study, an in-house multi-dimensional code has been developed which simulates the combustion of n-heptane in a Homogeneous Charge Compression Ignition (HCCI) engine. It couples the flow field computations with detailed chemical kinetic scheme which involves the multi-reactions equations. A chemical kinetic scheme solver has been developed and coupled for solving the chemical reactions an...

Objective: To review the literature on the effects of expiratory rib cage compression on ventilatory mechanics, airway clearance, and oxygen and hemodynamic indices in mechanically ventilated adults. Methods: Systematic review with meta-analysis of randomized clinical trials in the databases MEDLINE (via PubMed), EMBASE, Cochrane CENTRAL, PEDro, and LILACS. Studies on adult patients hospitali...

BACKGROUND In a rodent model of cardiac arrest and resuscitation in which the inspired gas mixture was enriched with oxygen, resuscitability and survival were unaffected by positive pressure ventilation. In the present study, in a larger animal model, tidal volumes generated during precordial compression and with spontaneous gasping were quantitated. METHODS Domestic pigs with an average weig...

This study was undertaken to understand and predict results of experimental cardiopulmonary resuscitation (CPR) techniques involving compression and decompression of either the chest or the abdomen. Simple mathematical models of the adult human circulation were used. Assumptions of the models are limited to normal human anatomy and physiology, the definition of compliance (volume change/pressur...