title: [Practical conduct for patients with a lonely hypoxemia at rest or during exercise].
abstract: BACKGROUND
  Hypoxemia is a decrease in blood oxygen partial pressure. This work aims at presenting a practical conduct for patients with a lonely hypoxemia at rest or during exercise, defined by the absence of dyspnea at rest, obvious clinical or radiographic abnormality.
  
  
  BACKGROUND
  Diagnostic tools available to the clinician are clinical examination, CT scan, echocardiography, hyperoxia test, trans cranial ultrasound and lung scintigraphy. This work proposes a practical diagnostic approach, with a main role of chest CT.
  
  
  CONCLUSIONS
  Work is underway to determine more precisely the place of echocardiography for the diagnosis of intra or extra cardiac shunts.
  
  
  CONCLUSIONS
  The finding of a lonely hypoxemia requires careful diagnostic approach to quickly rule out potentially serious causes and not to disregard the rare causes.
authors.affiliation: Service des maladies respiratoires, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France. Electronic address: nicolas.paleiron@free.fr.
authors.forename: N
authors.initials: N
authors.lastname: Paleiron
authors.affiliation: Service des maladies respiratoires, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: E
authors.initials: E
authors.lastname: Riviere
authors.affiliation: Service de cardiologie, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: G
authors.initials: G
authors.lastname: Rohel
authors.affiliation: Service des maladies respiratoires, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: M
authors.initials: M
authors.lastname: Andre
authors.affiliation: Service de cardiologie, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: M
authors.initials: M
authors.lastname: Piquemal
authors.affiliation: Service de cardiologie, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: U
authors.initials: U
authors.lastname: Vinsonneau
authors.affiliation: Service de cardiologie, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: P
authors.initials: P
authors.lastname: Paule
authors.affiliation: Service des maladies respiratoires, HIA Clermont-Tonnerre, hôpital d'instruction des Armées, BCRM Brest, CC41, rue Colonel-Fonferrier, 29240 Brest cedex 9, France.
authors.forename: F
authors.initials: F
authors.lastname: Grassin
mesh_terms: D003663:Decision Trees; D004452:Echocardiography; D015444:Exercise; D006801:Humans; D000860:Hypoxia / Q000175:diagnosis*; D017410:Practice Guidelines as Topic; D012146:Rest
keywords: CT scan; Cellular hypoxia; Embolie pulmonaire; Foramen ovale; Hypertension pulmonaire: Tomodensitométrie; Hypoxie cellulaire; Pulmonary embolism; Pulmonary hypertension