BACKGROUND We evaluated the effects of intravenous dexmedetomidine during spinal anesthesia on hemodynamics, respiratory rate, oxygen saturation, sedpain, and compared them with those of saline infusion. Sixty American Society of Anesthesiologists physical status I and II cases were randomly divided into two groups. Patients were connected to the monitor after premedication, and spinal anesthes...

1. Disciplina de Pneumologia, Universidade Federal de São Paulo, São Paulo (SP) Brasil. Tissues obtain energy primarily from oxygen. Adequate oxygen levels in the inhaled air and a preserved ventilation/ perfusion ratio (V • /Q) are the major determinants of oxygen supply to the blood. However, peripheral supply depends on effective oxygen transport to the tissue mitochondria, a critical task t...

In an attempt to identify those infants with resolving chronic lung disease of prematurity (CLD) at greatest risk of sudden infant death syndrome or acute life threatening event (SIDS/ALTE), or readmission to hospital following discharge, recordings of arterial oxygen saturation were made on 35 infants. Recordings were collected while the infants were breathing room air. Movement artefact was e...

BACKGROUND A study was undertaken to determine if arterial blood gas estimation is always necessary in the assessment of patients presenting to hospital with acute severe asthma, or whether oxygen saturation as measured by pulse oximetry is a reliable screening test for predicting those in respiratory failure. METHODS A prospective study was conducted in a specialist respiratory medical unit....

R ECENT ADVANCES in aircraft design have made possible attainment of altitudes in which man is unable to live, even while breathing pure oxygen. This difficulty has been overcome by the development of pressurized cabins and, to some extent, by the use of pressure-breathing equipment. The latter effectively increases alveolar oxygen tension; however, there has been some uncertainty as to whether...

BACKGROUND The upright sitting or beachchair position is associated with hypotension, risk of cerebral hypoperfusion, and cerebral injury. We hypothesized that by increasing arterial pressure with phenylephrine administration, cerebral perfusion, and postoperative recovery would be improved. METHODS Thirty-four patients undergoing elective shoulder surgery were randomized to receive either sa...

BACKGROUND Perioperative optimization of spatially resolved near-infrared spectroscopy determined cerebral frontal lobe oxygenation (scO2) may reduce postoperative morbidity. Norepinephrine is routinely administered to maintain cerebral perfusion pressure and, thereby, cerebral blood flow, but norepinephrine reduces the scO2. We hypothesized that norepinephrine-induced reduction in scO2 is infl...

Considering the growing trend of laryngeal surgeries and the need to protect the airway during and after surgery, among several therapeutic regimens to induce sedation, two regimens of propofol-fentanyl and propofol-midazolam were compared in microlaryngeal surgeries. Forty ASA I-II class patients undergoing microlaryngeal surgeries and referring routinely for postoperative visits were randomly...

Submit Manuscript | http://medcraveonline.com Abbreviations: PNP: Pneumoperitoneum; SVR: Systemic Vascular Resistances; PVR: Pulmonary Vascular Resistances; HR: Heart Rate; PaO2:-Arterial Saturation of Oxygen; MBP: Mean Blood Pressure; IV: Intravenously; SpO2: Peripheral Oxygen Saturation; Vt: Tidal Volume; IPPV: Intermittent Positive Pressure Ventilation; EtCO2: End Tidal Carbon di Oxide; ECG:...

STUDY AIM To evaluate the feasibility of combined oximetry (pulse oximetric saturation [Spo(2)]) and cutaneous capnography (transcutaneous carbon dioxide tension [Ptcco(2)]) for oxygen titration in patients requiring long-term oxygen therapy. METHODS Twenty patients with obstructive or restrictive lung disease underwent oxygen titration using a combined cutaneous oximetry-capnography sensor. ...