747. Chest Film Findings in Hospitalized Adults with Swine Influenza (H1N1) Pneumonia
Session: Abstracts: Virology: Influenza
Friday, October 22, 2010
Background:

To determine the chest x-ray (CXR) findings in adults hospitalized with swine influenza (H1N1) pneumonia during the pandemic.

Methods:

The admission chest x-rays of 25 adults hospitalized with swine influenza (H1N1) pneumonia for type of infiltrates, distribution of infiltrates, and pleural effusions. None of the patients had pre-existing CXR infiltrates.  The CXR was repeated at 48 hours.

Results:

Patients with swine influenza 16/25 (64%) ranged from  moderately to severely ill.  Three quarters (19/25) = 76% had no infiltrates on CXR.  20% had accentuated basilar markings.   None (0/25) had focal segmental/lobar infiltrates of bacterial pneumonia.

 

Swine Influenza (H1N1) Pneumonia:  Summary of Admission Chest Film Findings in 25 Adult Hospitalized Patients

Chest film findings

No. of patients

Percentage

 

 

 

No infiltrates

19/25

76%

Accentuated unilateral/ bilateral basilar lung markings/ atelectasis

5/25

20%

Bilateral interstitial/patchy infiltrates

1/25

4%

Focal segmental/lobar

0/25

0%

Small pleural effusions

5/25

20%

Conclusion:

After 48 hours, bibasilar markings resolved in 1/16 (7%) and, in 2/16 (13%) to bilateral progressive interstitial infiltrates.  No patients developed bacterial CAP, i.e., focal segmental/lobar infiltrates after 48 hour or during hospitalization.   We conclude that the most common CXR appearance of adults hospitalized with swine influenza (H1N1) CAP is no infiltrates.  Increased prominence  of basilar lung markings was common as were small bilateral pleural effusions.  No patient had, or developed bilateral CAP during hospitalization.


Subject Category: V. Virology including clinical and basic studies of viral infections, including hepatitis

Speakers:
Uzma Syed, DO , Winthrop University Hospital, State University of New York School of Medicine at Stony Brook, Mineola, NY
Nardeen Mickail, MD , Winthrop University Hospital, State University of New York School of Medicine at Stony Brook, Mineola, NY
Stephanie Strollo, MD , Winthrop University Hospital, State University of New York School of Medicine at Stony Brook, Mineola, NY
Burke A. Cunha, MD , Winthrop University Hospital, State University of New York School of Medicine at Stony Brook, Mineola, NY

Disclosures:

U. Syed, None

N. Mickail, None

S. Strollo, None

B. A. Cunha, None

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