title: Effects of pneumoperitoneum on the amplitude of diaphragmatic excursion in pigs.
abstract: OBJECTIVE
  To study the effects that pneumoperitoneum achieved through carbon dioxide insufflation has on diaphragmatic excursion in pigs.
  
  
  METHODS
  A total of 14 male Landrace pigs, 30 to 45 days of age and weighing five to seven kilograms each, were used. The sample was randomly and equally divided into two groups: one (n = 7) in which pneumoperitoneum was maintained at 10 mmHg for 60 minutes; and another (n = 7) in which pneumoperitoneum was maintained at 15 mmHg (also for 60 minutes). After anesthetic induction, the animals were intubated. Flow volume was monitored, and the amplitude of diaphragmatic excursion was analyzed using noninvasive ultrasound imaging of the right hemidiaphragm.
  
  
  RESULTS
  In both groups, restricted diaphragmatic excursion was observed only during the procedure. There was no statistical difference between the two pressure levels studied.
  
  
  CONCLUSIONS
  The amplitude of diaphragmatic excursion was restricted during abdominal insufflation, independent of the pressure level (within the 10-15 mmHg range), during the study period.
authors.affiliation: University of the Amazon, Belém, PA, Brazil. normando@amazon.com.br
authors.forename: Valéria Marques Ferreira
authors.initials: VM
authors.lastname: Normando
authors.forename: Marcus Vinicius Henriques
authors.initials: MV
authors.lastname: Brito
authors.forename: Francisco Alves
authors.initials: FA
authors.lastname: de Araújo Júnior
authors.forename: Breno Costa Maciel
authors.initials: BC
authors.lastname: Albuquerque
mesh_terms: D000818:Animals; D002245:Carbon Dioxide; D003964:Diaphragm / Q000000981:diagnostic imaging / Q000502:physiology*; D008170:Lung Compliance / Q000502:physiology; D008297:Male; D009068:Movement; D011028:Pneumoperitoneum, Artificial / Q000009:adverse effects* / Q000379:methods; D011897:Random Allocation; D012119:Respiration; D013552:Swine; D013997:Time Factors; D014463:Ultrasonography; D020535:Video-Assisted Surgery
chemical_list: D002245:Carbon Dioxide