Issn Print: 0143-3636
Publication Date: 2000/05/01
32. Comparison of oxygen saturation levels in patients receiving Technegas by the conventional unassisted method versus the positive ventilation delivery system (PVDS)
M. P. Dobson; C. A. Leiper; K. Lee; H. Dixson; R. R. Babichera; C. Bui
Excerpt
The purpose of this study is to compare oxygen saturation levels (SaO2) in 289 patients undergoing conventional lung ventilation scintigraphy (control group) and 27 patients undergoing Positive Ventilation Delivery System (PVDS). The 27 patients were selected as their conventional method of inhalation proved to be inadequate or non-diagnostic. The patients underwent a second ventilation using PVDS, which improved the diagnostic quality of the ventilation image and assisted in clinical management decisions. Some patients in both the PVDS and the control group experienced a transient lowering in their SaO2. The mean initial SaO2 in the control group did not fall below 94.9 % and in the PVDS group measured 90.6%. 93% (25/27) of patients in the PVDS group were assessed as non CO2 retaining, and received oxygen at 10 l/min during Technegas inhalation. The mean trough saturation in the PVDS group was 91.7% which was significantly higher than that of the control group (86.9%). No patient in either group experienced any significant complication attributed to the transient fall in SaO2 during technegas administration. We conclude that oxygen supplied as part of the PVDS system ameliorates the transient reduction in SaO2 seen during standard Technegas administration.
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