ABSTRACT
Background:Arterialhypoxaemiaisthecommonestcomplication,sincerespiratory depressantdrugsareusedforpremedication,andtheairwayisalsopartially occludedbythebronchoscope.Thestudyisthereforedesignedtofindoutthechangesinarterialoxygen tensionduring (FOB)alongwitheffectoncentral hemodynamics, pre andpost procedure ECGand PFT.Objectives were tofind out thechanges in arterial oxygentension during FOB, to study the effects of FOBon central hemodynamics, electrocardiographicallyand pulmonaryfunction tests.Methods:One hundred patients aged above 20 years undergoing FOB were evaluated for the arterial oxygen tension and cardiac rhythm changes at KNCH, Jodhpur during 12 months study period from 2019 to 2020.Results:All patients developed a fall in PaO2following FOB but hypoxaemia was noted only in 18 cases. Bronchial washing, punch biopsy and brush biopsy did contribute to hypoxaemia significantly. There was a uniform rise in heart rate in all the patients after FOB which was statistically significant. There was slight sinus tachycardia inmostofthecases although ECG indicated no major arrhythmias.ThepulmonaryfunctionswhichincludechangeinVC,FVC, FEV1andPEFR after FOB, on statisticallycomparisonnostatistical difference could be observed. Therewasnosignificantchangein PaCO2level and pH level.MeanofSBP andmeanofDBPwasstatistically significant.Conclusions:All patients showed a decline in arterial PaO2after FOB which was highly significant. There was slight sinus tachycardia in most of cases. FOB itself does not endanger the patients with any significant or serious complications.
ABSTRACT
Saber sheath trachea is defined as an anteroposterior (sagittal) diameter of intrathoracic trachea exceeding to lateral (coronal) by a ratio of 2:1 as measured at the site 1 cm above the aortic arch and the extra thoracic trachea being normal. It is most commonly seen in males and is considered to be a diagnostic sign of Chronic obstructive pulmonary disease.