Biomedical subjects

R Company

Publications and source records attributed to R Company.

29 records · Page 2Linked to original sources

PubMedDate not supplied

[Clinical assessment of a new anesthetic system: the Temel Supra (II)].

OBJECTIVES: To assess the clinical performance of a new anesthetic system developed to provide novel advantages in ventilating the anesthetized patient. PATIENTS AND METHOD: The clinical performance of the Temel Supra was evaluated in 100 adult patients who were anesthetized and ventilated using the device. RESULTS: The patients were adequately oxygenated and ventilated; no adverse events were observed. An open circuit, low flow, or closed circuit could be chosen freely. Ventilation was fully monitored: among the variables measured were rebreathed volume; leaks while the patient was connected; consumption of oxygen, nitrous oxide and anesthetic agents; and cardiac output (noninvasively). CONCLUSIONS: Ventilation and gas exchange were satisfactory in all cases even though some patients developed considerable respiratory impedance. The monitoring of oxygen and other gases consumed and of carbon dioxide produced provided very valuable information about metabolism and pharmacokinetics. The noninvasive monitoring of cardiac output seems to us to be a useful feature for aiding hemodynamic control. The independence of the open and closed circuits means that expired gases do not pass through the canister when the open circuit is used, resulting in savings on soda lime for drying. During pressure-control ventilation, the system maintains a plateau to guarantee better distribution of inspired gases. Other important features are warnings, constant monitoring of leaks, the 100% efficacy of the circuit, and the low internal volume.

Adult↗

PubMedDate not supplied

[Results of functional analysis on an obstructive model of the lung using an Ergojet CVT high-frequency jet respirator. Comparison with the normal pattern].

This paper expands a previous study on functional analysis of high frequency jet (HFJV) "Ergojet CVT" ventilation module inserted in Ergotronic 3 (Temel SA) respirator. The analysis was made on a pulmonary monoalveolar model with a compliance of 50 ml/cmH2 = and a resistance of 20 cmH2O/l/se simulating an obstructive pattern. Results were also compared with those obtained in a previous study on normal lung. HFJV was applied using a jet with or without additional gas input (VE) at respiratory rates of 90, 120, 150, 180, 210, 240, 270, and 300 per minute varying in each frequency the releasing pressure of the jet (PG 1, 2, and 3 kg/cm2) and the inspiratory time (Ti 30 to 50%) giving rise to a total of 96 different situations. In each of these conditions we measured the air way pressure (Paw) and the alveolar pressure (PA) and we calculated the tidal volume (VT) and the trapped volume (VAT). These measurements were correlated with those monitored by the respirator and those obtained in the normal lung. Results show that the VT is composed almost exclusively by the jet volume (VTjet), being only of consideration the VE with a Ti of about 33% and a PG of 2 to 3 kg/cm2. When the normal pattern was compared with the obstructive one, a small reduction in VT (average of 15%) and a marked increase in peak Paw (average of 75%) were observed. The use of a Ti of 50% has no clinical interest due to the large VAT that it produces.(ABSTRACT TRUNCATED AT 250 WORDS)

High-Frequency Jet Ventilation↗

PubMedDate not supplied

[Functional analysis of the high frequency jet respirator on a normal lung model. Ergojet CVT].

In this paper the results of the functional analysis of the Ergojet CVT, which is the high-frequency jet ventilation (HFJV) module of the Ergotronic 3 ventilator (Temel S.A.) are described. For a better understanding a detailed description of the module has been included. The functional analysis was performed on a standard lung model of normal compliance and resistance (C: 50 ml/cmH2O and R: 8 cmH2O.1-1.seg-1). High frequency jet ventilation was applied using the jet with and without additional gas entrainment, at frequencies of 90, 120, 150, 180, 210, 240, 270 and 300 rpm; for each frequency changes were made on the driving pressure (Pdriv: 1-2-3 kg.cm-2) and the inspiratory time (Ti: 33-50%). The combination of these parameters produced 96 different ventilatory circumstances. In each of them, airway and alveolar pressures (Paw and PA) were measured. Tidal and alveolar gas-trapped volumes (VT and Vtrap) were calculated from the previous PA measurements. These values were compared with those displayed by the ventilator. Following the results of the functional analysis of the Ergojet CVT, the VT delivered by the jet is the primary determinant of the VT, being little de increment due to the entrainment of gas. In the normal lung model, an adequate VT is obtained until frequencies of 240 rpm, using a Pdriv of 3 kg.cm-2. Vtrap, as in conventional ventilation, depend on VT and Te. The Pdriv and Ti, can be adequatelly combined in order to obtain a minimal Vtrap. Peak Paw depends on VT and Paw min on Vtrap.(ABSTRACT TRUNCATED AT 250 WORDS)

Biophysical Phenomena↗

PubMedDate not supplied

[Headache after spinal puncture. Treatment alternatives: epidural blood patch].

Headache is one of the most frequent complications of the subarachnoid puncture. Physiopathology and the different clinical factors involved in this type of headache are reviewed. The treatment is based in two types of procedures: those increasing cerebrospinal fluid production and those trying to decrease its leakage, like the epidural blood patch.

Adult↗

PubMedDate not supplied