Effect of Body Posture on Flow-volume Loop and Upper Airway Obstruction Indices, Before and After Thyroid Surger

AbstractAnatomical and functional estimations of the upper airways in patients after partial laryngectomies (cordectomy, hemilaryngectomy, enlarged hemilaryngectomy) carried out due to cancer are discussed in this paper. The post-operative lumen of the larynx and the trachea were estimated by radiological examination. The coefficient larynx/trachea (L/T) was proposed to describe fixed obstruction.At the same time, all patients underwent spirometric examinations. Inspiratory and expiratory parameters of the flow-volume loop were evaluated. In 39 patients the L/T coefficient was lower than in a group of patients with chronic bronchitis (P<0.05). Also inspiratory and some expiratory parameters of the flow–volume loop decreased in contrast to the group with chronic bronchitis. All results showed the usefulness of radiological and spirometric methods in detecting upper airway obstructions and confirmed their fixed character. The influence of the area of operation on the degree of upper airway obstruction was emphasized.

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Assessment of upper airway obstruction sites by means of sonoendoscopy and its correlation with OSAS severity before and after surgery

10.1183/23120541.sleepandbreathing-2021.69 ◽

2021 ◽

Author(s):

L D Campos ◽

A C Marao ◽

C D C Correa ◽

S A T Weber

Keyword(s):

Airway Obstruction ◽

Upper Airway ◽

Upper Airway Obstruction ◽

Before And After

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Pattern of upper airway obstruction during sleep before and after uvulopalatopharyngoplasty in patients with obstructive sleep apnea

Sleep Medicine ◽

10.1016/s1389-9457(00)00095-2 ◽

2001 ◽

Vol 2 (4) ◽

pp. 309-315 ◽

Cited By ~ 19

Author(s):

A Boudewyns

Keyword(s):

Obstructive Sleep Apnea ◽

Sleep Apnea ◽

Airway Obstruction ◽

Upper Airway ◽

Upper Airway Obstruction ◽

Obstructive Sleep ◽

Before And After

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Flow volume curve: A diagnostic tool in extrathoracic airway obstruction

Pakistan Journal of Medical Sciences ◽

10.12669/pjms.36.4.2283 ◽

2020 ◽

Vol 36 (4) ◽

Author(s):

Thamir Al-Khlaiwi

Keyword(s):

Airway Obstruction ◽

Diagnostic Tool ◽

Upper Airway ◽

Lung Pathology ◽

Flow Volume ◽

Creative Commons ◽

Flow Volume Loop ◽

Volume Curve ◽

Flow Volume Curve ◽

Extrathoracic Airway

The flow-volume loop (F/V-loop) is a presentation of inhalation and exhalation of air stream volume during inspiration and expiration. It demonstrates the obstructive, restrictive and mixed pattern lung pathology. Flow-volume loop has been extensively used for evaluating the severity, progression and resolution of various causes of upper-airway conditions. doi: https://doi.org/10.12669/pjms.36.4.2283 How to cite this:Al-Khlaiwi T. Flow volume curve: A diagnostic tool in extrathoracic airway obstruction. Pak J Med Sci. 2020;36(4):---------. doi: https://doi.org/10.12669/pjms.36.4.2283 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Inspiratory Flow Volume Loops and the Diagnosis of Upper Airway Obstruction

Clinical Pulmonary Medicine ◽

10.1097/cpm.0b013e3181857e7c ◽

2008 ◽

Vol 15 (5) ◽

pp. 274-282 ◽

Cited By ~ 2

Author(s):

Carl R. Pavel ◽

Michael J. Morris ◽

Karin L. Nicholson ◽

Jackie A. Hayes

Keyword(s):

Airway Obstruction ◽

Upper Airway ◽

Inspiratory Flow ◽

Upper Airway Obstruction ◽

Flow Volume

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Upper airway obstruction in patients with endothoracic goiter enlargement: no relationship between flow-volume loops and radiological tests

Acta Endocrinologica ◽

10.1530/eje-10-0235 ◽

2010 ◽

Vol 163 (4) ◽

pp. 665-669 ◽

Cited By ~ 12

Author(s):

M Albareda ◽

J Viguera ◽

C Santiveri ◽

P Lozano ◽

A Mestrón ◽

...

Keyword(s):

Airway Obstruction ◽

Vital Capacity ◽

Visual Analysis ◽

Upper Airway ◽

Forced Expiratory Volume ◽

Upper Airway Obstruction ◽

Flow Volume ◽

Flow Parameters ◽

Forced Expiratory Flow ◽

Expiratory Flow

BackgroundIn about 16–85% of subjects with goiter, upper airway obstruction (UAO) is observed. This percentage is higher in patients affected by goiter with endothoracic enlargement. UAO is an indication for surgery. Visual analysis of flow-volume loops (FVL) are the best indicators for UAO, although various studies using clinical and radiological parameters have observed no correlation.ObjectiveTo evaluate the presence of UAO in patients with endothoracic goiter enlargement and the relationship between the FVL with the observed symptoms and the measurements obtained by computed tomography (CT).SubjectsSubjects with endothoracic goiter enlargement participated in the study.Designi) Symptom questionnaire (dysphagia, dyspnea, cough, oppression, dysphonia, and worsened symptoms when prone); ii) analysis: TSH and free thyroxine; iii) cervical ultrasound; iv) cervical-thoracic CT (measurements of area and diameter in the area of maximum stenosis and at 2 cm from the carina); v) chest radiography and vi) forced spirometry: visual analysis of FVL morphology and the maximum forced expiratory volume in 1 s (FEV1), forced expiratory flow at 50% vital capacity/forced inspiratory flow at 50% vital capacity and FEV1/peak expiratory flow parameters.ResultsFifty subjects participated in the study: 11 men/39 women, median age 73.8 years (43.76–88.43). UAO was diagnosed in 13 cases (26%, confidence interval: 14.6–40.3%) and 27 subjects (54%) presented symptoms suggesting goiter compression. No clinical or radiological variables showed the presence of UAO.ConclusionsThe frequency of UAO in subjects affected by goiter with endothoracic enlargement was lower than that described for goiter patients, and there were no clinical or radiological indicators to establish its presence.

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