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MeSH Review

Plethysmography

 
 
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Disease relevance of Plethysmography

 

Psychiatry related information on Plethysmography

 

High impact information on Plethysmography

 

Chemical compound and disease context of Plethysmography

  • METHODS: The forearm blood flow (FBF) was measured in 25 patients with essential hypertension and in 25 normotensive subjects by using strain-gauge plethysmography during reactive hyperemia (RH) (280 mm Hg for 5 min) and after sublingual administration of nitroglycerin (NTG, 0.3 mg) [12].
  • 2. We measured forearm blood flow responses (plethysmography) to isocapnic hypoxia (arterial saturation approximately 85%) in eight healthy men and women (18-26 years) after selective alpha-adrenergic blockade (phentolamine) of one forearm [13].
  • METHODS: In 70 hypertensive patients with electrocardiographic left ventricular hypertrophy, we measured minimal forearm vascular resistance (MFVR) by plethysmography and insulin sensitivity (M/IG) by a 2-h isoglycemic hyperinsulinemic clamp at baseline and after 1, 2 and 3 years of blinded treatment with atenolol- or losartan-based regimens [14].
  • Strain-gauge plethysmography was repeated at the end of heparin treatment, and evaluation of therapy was performed by comparing the indexes of venous hemodynamics and by assessing the incidence of pulmonary embolism and of bleeding complications [15].
  • Breathing pattern was recorded in 4-day-old rats by airflow plethysmography, during normoxia in warm (control) and cold conditions, or during hypoxia (inspired O2 = 10%) in warm or cold conditions, each lasting 15 min [16].
 

Biological context of Plethysmography

 

Anatomical context of Plethysmography

  • In 11 healthy humans, we recorded muscle sympathetic nerve activity (MSNA) with microelectrodes (peroneal nerve), as well as blood flow in the forearm and calf (venous occlusion plethysmography) at baseline and during graded LBNP [22].
  • Strain-gauge plethysmography of the lower limbs was used to calculate arterial calf blood flow (RF), arterial calf blood flow after post-ischaemic hyperaemia (PF), basal and minimal vascular resistances (BVR and MVR), time to reach peak flow (tPF), time until 50% reduction of peak flow (tT1/2) and total recovery time (tT) [23].
  • METHODS: Using optoelectronic plethysmography, total and regional chest wall volumes were measured non-invasively in 20 stable patients with COPD (mean (SD) forced expiratory volume in 1 second 43.6 (11.6)% predicted) and dynamic hyperinflation was tracked breath by breath to test if this was the mechanism of exercise limitation [24].
  • OBJECTIVE: The objective of this study was to determine the effect of body hair (scalp and facial) on air displacement plethysmography (BOD POD) estimates of percentage of body fat [25].
  • DESIGN: Forearm blood flow was studied using venous occlusion plethysmography in patients with chronic heart failure (n = 12) and matched controls (n = 13), after infusion of L-NMMA (a nitric oxide synthase inhibitor), glyceryl trinitrate (an endothelium independent vasodilator), and serotonin (an endothelium dependent vasodilator) [26].
 

Associations of Plethysmography with chemical compounds

 

Gene context of Plethysmography

  • METHODS: Forearm blood flow (FBF) responses (strain-gauge plethysmography) to intra-arterial infusion of a selective blocker of ETA receptors (BQ-123) and, on a separate occasion, to ET-1 were measured in 12 hypercholesterolemic patients and 12 normal control subjects [32].
  • Forearm blood flow (FBF) was measured by venous occlusion plethysmography and plasma levels of ET-1 were analyzed [33].
  • Ventilatory responses to acute hypoxia were measured by indirect plethysmography in unanesthetized, unrestrained wild-type mice and in mice in which the NEP gene was deleted (NEP -/-) [34].
  • Blood pressure measured by tail-cuff plethysmography was significantly elevated in the male 129/COX-2-/- mice (165.8 +/- 9.2 vs. 116 +/- 5.1 mmHg, P < 0.05), and to a much lesser extent in the female 129/COX-2-/- mice (127.4 +/- 3.3 vs. 102.4 +/- 3.3), whereas it was unchanged in the C57- or BALB/COX-2-/- mice regardless of gender [35].
  • Study variables were forearm blood flow (strain-gauge plethysmography), arterial and venous concentrations of t-PA mass concentrations, and calculated net release (forearm plasma flow x veno-arterial differences) [36].
 

Analytical, diagnostic and therapeutic context of Plethysmography

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