• Other indices of abnormal distribution of ventilation (like those derived from multiple-breath nitrogen washout technique or impulse oscillometry) have been used to assess small airway involvement, with some positive results in terms of either a distinction between symptomatic vs non symptomatic patients or a correlation with other functional or inflammatory markers of airway involvement. (ginasma.it)
  • Potential mechanisms for this increase include nonuniform pulmonary vasoconstriction, ventilatory time constant inequality, reduced large airway gas mixing, and development of interstitial pulmonary edema. (biomedsearch.com)
  • This study investigated the effects of moderate concentrations of supplemental oxygen on PCO 2 , pH, minute ventilation (V E ) and physiological dead space to tidal volume ratio (V D /V T ) among people with stable untreated OHS, with comparison to healthy controls. (bmj.com)
  • These decisions and management strategies appear relevant for further discussion and research, as this fluid resuscitation attempts to provide adequate organ perfusion and oxygen delivery in a system compromised by the physiological consequences of injury. (springer.com)
  • What is clear is that the D-dimer is increased in most patients, less than 50% with PE have a DVT on ultrasound, the ventilation-perfusion (V/Q) scan is "normal" in two thirds of patients, and the risk of contrast material to the fetus is unknown. (crashingpatient.com)
  • Thus, it remains uncertain as to whether this cardiovascular design is an exquisite adaptation to low ectothermic metabolism and intermittent pulmonary ventilation, or merely an atavistic relict with no particular functional benefits ( Hicks and Wang, 2012 ). (biologists.org)
  • Units with high V/Q ratio have relatively high pO2 but because of non-linear O2 dissociation curve add little to O2 concentration (compared to the decrement caused by the low V/Q areas). (acemprimary.com)
  • Conversely, arterial P CO 2 can also be elevated by lowering ventilation relative to metabolism (i.e. reducing the air convection requirement, ACR). (biologists.org)
  • After pneumonectomy, minute ventilation and O2 consumption at comparable submaximal work loads were unchanged but arterial PCO2 at any work load was higher, implying that ventilatory response to CO2 was impaired. (semanticscholar.org)
  • The authors hypothesized that ventilation-perfusion (VA/Q) inequality is more pronounced in patients with MVD before and after induction of anesthesia and during and after surgery when extracorporeal circulation (ECC) is used. (biomedsearch.com)
  • 2010 ), and it is possible that the slower digestion stems from reduced perfusion of the gastrointestinal organs after occlusion of the left aortic arch ( Hicks and Wang, 2012 ). (biologists.org)