Pulmonary & Respiratory Medicine

Chowdhury S

Publications

• Research Article
  Assessment of Hemodynamic Changes during Mechanical and Spontaneous Ventilation by Variations in Pulse Oximetry Waveform in Critically Ill Patients Undergoing Hemodialysis: A Pilot Study to Evaluate Reliability of a Noninvasive Technique
  Author(s): Stern K, Pillai R, Chowdhury S and Baydur AStern K, Pillai R, Chowdhury S and Baydur A
  
  Background: Pulse oximetry (SpO2) waveform analysis has recently been compared to intraarterial waveform analysis in assessing intravascular volume in various conditions. Its usefulness during and following ultrafiltration (UF) has not been evaluated. The aim of this pilot study was to assess the relationship of volume removal during UF to SpO2 waveform fluctuations in spontaneously breathing (SB) patients and compare it to patients receiving mechanical ventilation (MV). Hypothesis: Volume removal during UF increases the amplitude and peak-to-peak variability of the SpO2 waveform (ΔP and ΔS, respectively). Methods: Pulse oximetry waveform analysis was conducted in thirty-eight critically ill patients (total: 81 encounters) undergoing UF. SpO2 was recorded at the fingertip in 36 of 38 patients. .. Read More»
  DOI: 10.4172/2161-105X.1000479

  Abstract PDF