We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Acquired Tracheomegaly in Very Preterm Neonates

Vinod K. Bhutani, MD; William G. Ritchie, MD; Thomas H. Shaffer, PhD
Am J Dis Child. 1986;140(5):449-452. doi:10.1001/archpedi.1986.02140190059026.
Text Size: A A A
Published online


• Proximal airways are compliant structures at early gestational ages and may be susceptible to pressure-induced deformation following prolonged ventilatory support. Sixteen neonates (mean ± SD gestational age, 27.0 ±0.6 weeks; mean ± SD birth weight, 847 ±68 g) were studied to assess tracheal volume deformation. The neonates received ventilatory support for a mean ± SD duration of 25.4±4.9 days. During this period the maximum peak inspiratory pressures ranged from 15 to 25 cm H2O, and respirations ranged from 20/min to 60/min. These neonates were studied at seven days postextubation and were individually matched for body weight with 16 nonventilated neonates. The width of the tracheal air column was measured at the lower border of the first thoracic (T-1) and third thoracic (T-3) vertebrae. The average tracheal width (average of T-1 and T-3) was significantly (38%) wider in the ventilated group, and the mean ± SD tracheal width values were 3.79±0.29 mm, as compared with the control values of 2.74±0.31 mm. Based on these data It was estimated that the tracheal volume was 91% greater in the ventilated group. These observations demonstrate tracheal volume deformation and acquired tracheomegaly in neonates who have received mechanical ventilatory support. In addition to increased dead space ventilation, these findings also indicate underlying mechanical deformation of the tracheal wall.

(AJDC 1986;140:449-452)


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?





Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.