The saw-tooth sign on spirometry: An early clue to obstructive sleep apnea

Authors

  • Mariem Abdelmoula Laboratory of Physiology and Functional Explorations, Sousse, Farhat HACHED Hospital, Faculty of Medicine of Sousse,University of Sousse, Tunisia.
  • Wieme Ben Hmid Laboratory of Physiology and Functional Explorations, Sousse, Farhat HACHED Hospital, Faculty of Medicine of Sousse,University of Sousse, Tunisia.
  • Fatma Guezguez  Laboratory of Physiology and Functional Explorations,Heart Failure (LR12SP09) Research Laboratory, Farhat HACHED Hospital, Sousse, Faculty of Medicine of Sousse, University of Sousse,Sousse, Tunisia.
  • Emna Charfedi Laboratory of Physiology and Functional Explorations, Sousse, Farhat HACHED Hospital, Faculty of Medicine of Sousse,University of Sousse, Tunisia.
  • Sonia Rouatbi Laboratory of Physiology and Functional Explorations,Heart Failure (LR12SP09) Research Laboratory, Farhat HACHED Hospital, Sousse, Faculty of Medicine of Sousse, University of Sousse,Sousse, Tunisia. https://orcid.org/0000-0003-3411-1182
  • Helmi Ben Saad Laboratory of Physiology and Functional Explorations,Heart Failure (LR12SP09) Research Laboratory, Farhat HACHED Hospital, Sousse, Faculty of Medicine of Sousse, University of Sousse,Sousse, Tunisia.

DOI:

https://doi.org/10.62438/tunismed.v104i02.6539

Abstract

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References

Guezguez F, Ghannouchi I, Sayhi A, Charfedi E, Yahyaoui A, Rouatbi

S, et al. How to interpret parameters of routine lung function tests

in 2023? Tunis Med. 2023;101(3):323-33.

Sahni S, Blood A, Paulus S, Talwar A. "Saw-tooth sign" in upper airway disorders-a case report. Pneumonol Alergol Pol. 2015;83(2):140-3.

Bourne MH, Jr., Scanlon PD, Schroeder DR, Olson EJ. The sawtooth sign is predictive of obstructive sleep apnea. Sleep Breath. 2017;21(2):469-74.

Levent E, Sariman N. Analysis of obstructive sleep apnea patients with "sawtooth sign" on the flow-volume curve. Sleep Breath. 2011;15(3):357-65.

Rouatbi S, Tabka Z, Dogui M, Abdelghani A, Guenard H. Negative expiratory pressure (NEP) parameters can predict obstructive sleep apnea syndrome in snoring patients. Lung. 2009;187(1):23-8.

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Published

2026-04-01

Issue

Vol. 104 No. 02 (2026): Tunis Med Fev 2026

Section

Imaging in clinical practice

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