Analysis of Inspiratory Flow Shapes in Patients With Partial Upper-Airway Obstruction During Sleep

CHEST Journal ◽  
2001 ◽  
Vol 119 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Tero Aittokallio ◽  
Tarja Saaresranta ◽  
Päivi Polo-Kantola ◽  
Olli Nevalainen ◽  
Olli Polo
Keyword(s):  
Airway Obstruction ◽  
Upper Airway ◽  
Inspiratory Flow ◽  
Upper Airway Obstruction ◽  
Partial Upper Airway Obstruction

Gender differences in age and BMI distributions in partial upper airway obstruction during sleep

2007 ◽  
Vol 159 (2) ◽  
pp. 219-226 ◽  
Author(s):  
Ulla Anttalainen ◽  
Tarja Saaresranta ◽  
Nea Kalleinen ◽  
Jenni Aittokallio ◽  
Tero Vahlberg ◽  
...  
Keyword(s):  
Gender Differences ◽  
Airway Obstruction ◽  
Upper Airway ◽  
Upper Airway Obstruction ◽  
Partial Upper Airway Obstruction

Accelerometry of Adductor Pollicis Muscle Predicts Recovery of Respiratory Function from Meeting Abstracts

2003 ◽  
Vol 98 (6) ◽  
pp. 1333-1337 ◽  
Author(s):  
Matthias Eikermann ◽  
Harald Groeben ◽  
Johannes Hüsing ◽  
Jürgen Peters
Keyword(s):  
Airway Obstruction ◽  
Neuromuscular Blockade ◽  
Forced Vital Capacity ◽  
Respiratory Function ◽  
Vital Capacity ◽  
Upper Airway ◽  
Inspiratory Flow ◽  
Upper Airway Obstruction ◽  
Residual Paralysis ◽  
Adductor Pollicis Muscle

Background Residual paralysis increases the risk of pulmonary complications but is difficult to detect. To test the hypothesis that accelerometry predicts effects of residual paralysis on pulmonary and upper airway function, the authors related tests of pulmonary and pharyngeal function to accelerometry of adductor pollicis muscle in 12 partially paralyzed volunteers. Methods Rocuronium (0.01 mg/kg + 2-10 microg x kg-1 x min-1) was administered to maintain train-of-four (TOF) ratios (assessed every 15 s) of approximately 0.5 and 0.8 over a period of more than 5 min. The authors evaluated pharyngeal and facial muscle functions during steady state relaxation and performed spirometric measurements every 5 min until recovery. Upper airway obstruction was defined as a mean ratio of expiratory and inspiratory flow at 50% of vital capacity of greater than 1. The TOF ratio associated with "acceptable" pulmonary recovery (forced vital capacity and forced inspiratory volume in 1 s of > or =90% of baseline) was calculated using a linear regression model. Results At peak blockade (TOF ratio 0.5 +/- 0.16), forced inspiratory flow was impaired (53 +/- 19%) to a greater degree than forced expiratory flow (75 +/- 20%) with a mean ratio of expiratory and inspiratory flow at 50% of vital capacity of 1.18 +/- 0.6. Upper airway obstruction, observed in 8 of 12 volunteers, paralleled an impaired ability to swallow reported by 10 of 12 volunteers. In contrast, all volunteers except one could sustain a head lift for more than 5 s. The authors calculated that a mean TOF ratio of 0.56 (95% confidence interval, 0.22-0.71) predicts "acceptable" recovery of forced vital capacity, whereas forced inspiratory volume in 1 s was impaired until a TOF ratio of 0.95 (0.82-1.18) was reached. A 100% recovery of TOF ratio predicts an acceptable recovery of forced vital capacity, forced inspiratory volume in 1 s, and mean ratio of expiratory and inspiratory flow at 50% of vital capacity in 93%, 73%, and 88% of measurements (calculated negative predictive values), respectively. Conclusion Impaired inspiratory flow and upper airway obstruction frequently occur during minimal neuromuscular blockade (TOF ratio 0.8), and extubation may put the patient at risk. Although a TOF ratio of unity predicts a high probability of adequate recovery from neuromuscular blockade, respiratory function can still be impaired.

scholarly journals The Percutaneous Transtracheal Jet Ventilation in a Patient with Partial Upper Airway Obstruction

2001 ◽  
Vol 8 (4) ◽  
pp. 223-226 ◽  
Author(s):  
KY Fung ◽  
MC Yuen ◽  
WK Tung
Keyword(s):  
Airway Obstruction ◽  
Difficult Airway ◽  
Upper Airway ◽  
Upper Airway Obstruction ◽  
Emergency Physicians ◽  
Jet Ventilation ◽  
Partial Upper Airway Obstruction ◽  
Set Up

Difficult airway is a challenging emergency problem for emergency physicians. We reported a patient with partial upper airway obstruction managed by percutaneous transtracheal jet ventilation (PTJV) before definite airway was secured. The development, the set up, the advantages, and the precautions of using PTJV are briefly described.

Assessment of Changes in Upper Airway Obstruction by Automatic Identification of Inspiratory Flow Limitation During Sleep

2009 ◽  
Vol 56 (8) ◽  
pp. 2006-2015 ◽  
Author(s):  
Christian Morgenstern ◽  
Matthias Schwaibold ◽  
Winfried J. Randerath ◽  
Armin Bolz ◽  
Raimon Jane
Keyword(s):  
Airway Obstruction ◽  
Upper Airway ◽  
Inspiratory Flow ◽  
Upper Airway Obstruction ◽  
Automatic Identification ◽  
Flow Limitation
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