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Subpulmonary haemothorax: 387 cases.

J W van der Spuy1, J D Knottenbelt, R E Kottler

  • 1Trauma Unit, University of Cape Town, South Africa.

Injury
|September 1, 1991
PubMed
Summary

Subpulmonary haemothorax (SH) is often missed on initial chest X-rays. This condition, a common presentation of less massive haemothorax, requires careful radiological review to avoid diagnostic errors and unnecessary emergency procedures.

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Area of Science:

  • Radiology
  • Thoracic Surgery
  • Trauma Medicine

Background:

  • Subpulmonary haemothorax (SH) is an underdiagnosed condition, frequently overlooked in initial radiographic assessments of trauma patients.
  • Previous studies indicate a significant rate of missed SH diagnoses, leading to potential diagnostic delays and management errors.

Purpose of the Study:

  • To determine the incidence and diagnostic features of subpulmonary haemothorax (SH) in post-traumatic haemothorax and haemopneumothorax.
  • To evaluate the impact of targeted education on reducing diagnostic errors for SH.
  • To compare the clinical management and outcomes of patients with SH versus those with more apparent haemothorax.

Main Methods:

  • Retrospective review of 399 patients with post-traumatic haemothorax/haemopneumothorax to identify initial SH diagnoses and missed cases.
  • Prospective study of 1773 patients undergoing erect chest radiography for haemothorax/haemopneumothorax, focusing on SH identification.
  • Utilized confirmatory lateral decubitus radiography for SH diagnosis and compared outcomes between SH and non-SH groups.

Main Results:

  • SH was identified in 12.8% of patients in the retrospective review, with a 47.1% initial diagnostic error rate.
  • In the prospective study, SH occurred in 19.0% of patients (336/1773), with diagnostic errors reduced to 1.8% after educational intervention.
  • SH patients had significantly lower emergency thoracotomy rates (0.9%) compared to patients with more florid radiological signs (9.2%, P<0.0005).

Conclusions:

  • Subpulmonary haemothorax (SH) is a common radiological presentation of less massive haemothorax.
  • Targeted educational initiatives can significantly reduce diagnostic errors associated with SH.
  • Recognizing SH is crucial for appropriate patient management, potentially avoiding unnecessary invasive procedures.

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