title: [Possibilities of overcoming difficulties in the differential diagnosis of nonmassive pulmonary thromboembolism in patients taken to the hospital by ambulance].
abstract: OBJECTIVE
  To optimize the differential diagnosis of nonmassive pulmonary thromboembolism (PTE) in patients emergently admitted to a multidisciplinary hospital.
  
  
  METHODS
  The study enrolled 36 patients with nonmassive PTE and 28 with community-acquired pneumonias (ACP). All the patients underwent a comprehensive study, including primarily a clinical study in order to search for the early clinical manifestations of PTE. Ventilation-perfusion lung scintigraphy (VPLS) was performed in 11 patients with nonmassive PTE, 28 with ACP, and 10 healthy volunteers.
  
  
  RESULTS
  The initial diagnosis of ACP was established in 26 of the 36 emergently hospitalized patients. Most early clinical manifestations of PTE and A CP were similar; their distinguishing features suggested that there might be nonmassive PTE. It is suggested that VPLS should be used for differential diagnosis in the above cases, by additionally assessing alveolar-capillary permeability. Twenty-eight patients with ACP were found to have a pronounced and significant acceleration of alveolar-capillary permeability in the affected lung at minutes 10 [23.5 +/- 1.9% (versus 8.02 +/- 3.89% in 11 patients with nonmassive PTE; p = 0.01)] and 30 of the study [33.4 +/- 1.9% (versus 13.64 +/- 4.0% in nonmassive PTE; p = 0.004)] while in nonmassive PTE, alveolar-capillary permeability corresponded to the values typical of healthy individuals, without exceeding 12 and 22% at minutes 10 and 30 of the study, respectively.
  
  
  CONCLUSIONS
  VPLS makes it possible to verify or exclude the thromboembolic nature of pulmonary perfusion disorders. If it is difficult to make a diagnosis in the presence of the clinical symptoms characteristic of both nonmassive PTE and ACE, VPLS with an additional assessment of alveolar-capillary permeability, ACP substantially increases the accuracy of differential diagnosis of nonmassive PTE and ACE.
authors.forename: F F
authors.initials: FF
authors.lastname: Tetenev
authors.forename: T S
authors.initials: TS
authors.lastname: Ageeva
authors.forename: N G
authors.initials: NG
authors.lastname: Krivonogov
authors.forename: A V
authors.initials: AV
authors.lastname: Dubodelova
authors.forename: V Iu
authors.initials: VIu
authors.lastname: Danilenko
authors.forename: E S
authors.initials: ES
authors.lastname: Noll'
authors.forename: S M
authors.initials: SM
authors.lastname: Minin
mesh_terms: D000328:Adult; D000552:Ambulances; D017714:Community-Acquired Infections / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006760:Hospitalization; D006801:Humans; D008168:Lung / Q000098:blood supply / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000000981:diagnostic imaging; D012720:Severity of Illness Index; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed