JOURNAL ARTICLE

Ultrasound artifacts mimicking pleural sliding after pneumonectomy

Franco Cavaliere, Roberto Zamparelli, Maurizio P Soave, Riccardo Gargaruti, Andrea Scapigliati, Stefano De Paulis
Journal of Clinical Anesthesia 2014, 26 (2): 131-5
24561105

STUDY OBJECTIVE: To determine the presence of pleural sliding on chest ultrasonography (US) in a series of patients admitted to a surgical intensive care unit (SICU).

DESIGN: Prospective, observational study.

SETTING: 16-bed SICU of a University hospital.

PATIENTS: 8 patients (7 men, 1 woman), aged 64 - 73 years (mean 67.5 yrs). Seven patients underwent pneumonectomy for pulmonary neoplasms; one patient underwent an atypical lung resection after having undergone a pneumonectomy one year before.

INTERVENTIONS: None.

MEASUREMENTS: Chest ultrasounds were performed during mechanical ventilation and spontaneous ventilation after endotracheal tube removal. In both examinations, pleural sliding was searched bilaterally in brightness mode (B-mode) and motion mode (M-mode) on the anterior thoracic wall in the least gravitationally dependent areas.

RESULTS: During mechanical ventilation, pleural sliding was always absent on the side of the pneumonectomy and present on the other side. During spontaneous ventilation, some artifacts mimicking pleural sliding were noted on the side of the pneumonectomy both in B-mode and M-mode (presence of the seashore sign) in all patients, except for the one patient who had undergone a pneumonectomy one year earlier. Those artifacts became more pronounced during deep breaths.

CONCLUSIONS: Ultrasound artifacts mimicking pleural sliding may be observed in the absence of the lung and may originate from the activity of intercostal muscles since they become more evident during deep breathing.

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