Sniff nasal inspiratory pressure: what is the optimal number of sniffs?

Lofaso, Frédéric; Nicot, Frédéric; Lejaille, Michelle; Falaize, Line; Louis, A.; Clément, Annick; Jc, Raphael; David, Olivier; Fauroux, Brigitte

doi:10.1183/09031936.06.00121305

Cited by 93 publications

(85 citation statements)

References 10 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each sniff was associated by a strong verbal encouragement with visual feedback. At least 20 sniffs were performed, each separated by 30 s, until a consistent value was reached [17]. Sniff Poes and SNIP represented the amplitudes of pressure changes, and were expressed in absolute values.…”

Section: Measurementsmentioning

confidence: 99%

Sniff nasal inspiratory pressure in children with muscular, chest wall or lung disease

Fauroux¹,

Aubertin²,

Cohen³

et al. 2008

Eur Respir J

Self Cite

View full text Add to dashboard Cite

Sniff nasal inspiratory pressure is proposed as a noninvasive test of inspiratory muscle strength. During this manoeuvre, the nasal pressure is supposed to reflect oesophageal pressure.The aim of the present study was to compare the nasal pressure with the oesophageal pressure during a maximal sniff in children with neuromuscular disease (NM, n578), thoracic scoliosis (n512) and cystic fibrosis (CF, n523).A significant correlation was observed between the sniff nasal and oesophageal pressure. The ratio of the sniff nasal/oesophageal pressure was lower in patients with CF (0.72¡0.13) than in NM patients (0.83¡0.17) or patients with thoracic scoliosis (0.86¡0.10). In patients with CF and NM disease, this ratio was not correlated to age or spirometric data. The difference between the sniff oesophageal and nasal pressure exceeded 15 cmH 2 O in 17, 33 and 87% of the NM, thoracic scoliosis and CF patients, respectively.Sniff nasal pressure often underestimates the strength of inspiratory muscles in cystic fibrosis. Such an underestimation occurs more rarely in neuromuscular disease disorders and thoracic scoliosis. A normal value excludes inspiratory muscle weakness but a low value requires the measurement of the oesophageal pressure.

show abstract

Section: Measurementsmentioning

confidence: 99%

Sniff nasal inspiratory pressure in children with muscular, chest wall or lung disease

Fauroux¹,

Aubertin²,

Cohen³

et al. 2008

Eur Respir J

Self Cite

View full text Add to dashboard Cite

show abstract

“…Every subject performed each measure at least 5 times until 3 acceptable and reproducible results were obtained, that is, with no leakage and with a Ͻ 10% difference between measurements. 16 The SNIP test was performed by placing a nasal plug in 1 nostril (no preference for right or left) while keeping the contralateral nostril patent. 17,18 The subjects were instructed to perform short sharp sniffs with a closed mouth, starting from functional residual capacity after a quiet breath.…”

Section: Testing Methodsmentioning

confidence: 99%

Twitch Mouth Pressure and Disease Severity in Subjects With COPD

2013

View full text Add to dashboard Cite

INTRODUCTION:Patients with COPD have impaired respiratory muscle strength. Twitch mouth pressure (P tw,m ) in response to magnetic stimulation of the cervical nerve has been suggested to clinically reflect inspiratory muscle strength. However, studies on P tw,m values and their relationship with disease severity are limited. Thus, we tested the P tw,m values of subjects with COPD and investigated the relationship of these values with disease severity. METHODS: We recruited 75 COPD patients and 63 age-matched controls. All participants were tested for P tw,m , sniff nasal pressure (SNIP), and maximum static inspiratory mouth pressure (P I max ); the BODE (body mass index, air flow obstruction, dyspnea, exercise capacity) index was evaluated for overall severity assessment and the 6-min walk distance (6MWD) was used to determine the exercise capacity of subjects with COPD. RESULTS: Subjects with COPD had markedly lower P tw,m values compared with the controls (10.00 ؎ 2.17 vs 13.66 ؎ 2.20 cm H 2 O for males, 8.83 ؎ 0.89 vs 11.81 ؎ 1.98 cm H 2 O for female; each with P < .001). The P tw,m values decreased with increasing COPD severity, and similar trends were observed in the SNIP and P I max values. Regression correlation analysis showed that P tw,m values were significantly correlated inversely with the BODE index (R ‫؍‬ 0.65, P < .001) but positively correlated with 6MWD (R ‫؍‬ 0.59, P < .001) in the COPD group; the SNIP values of subjects with COPD were also correlated inversely with their BODE index (R ‫؍‬ 0.49, P < .001) but positively correlated with their 6MWD (R ‫؍‬ 0.33, P < .005). CONCLUSIONS: P tw,m values are 26.8% lower in male subjects with COPD and 25.3% lower in female subjects with COPD compared with the controls. The P tw,m values of subjects with COPD decrease with increasing disease severity. P tw,m was better correlated with the BODE index and exercise capacity than SNIP and P I max , which suggests that P tw,m more accurately reflects the overall severity and burden of COPD.

show abstract

“…Several studies have applied this methodology to healthy subjects [13] and to patients with neuromuscular diseases [14,17,22], spinal cord injury [16] and chronic obstructive pulmonary disease [17,33]. However, no studies measuring the IMS of CAD and postoperative MR patients by means of Pnsn were found.…”

Section: Discussionmentioning

confidence: 99%

“…The maneuver consisted of a maximal sniff performed by the contralateral (free) nostril with the mouth closed, and was based on FRC values. The sniff test included ten repetitions [22] with a 30-second interval between each. A sniff was considered acceptable when there was gradual elevation of pressure until a peak lasting between 0 and 5 seconds was reached [13].…”

Section: Methodsmentioning

confidence: 99%

Evaluation of maximal inspiratory and sniff nasal inspiratory pressures in pre- and postoperative myocardial revascularization

Graetz¹,

Zamunér²,

Moreno³

2012

Revista Brasileira De Cirurgia Cardiovascular

View full text Add to dashboard Cite

Objective: The objective of this study was to evaluate and correlate inspiratory muscle strength using maximal inspiratory pressure (MIP) and sniff nasal inspiratory pressure (Pnsn) in patients with coronary artery disease in pre-and postoperative of myocardial revascularization surgery.Methods: Thirty-eight men were studied, divided into a control group (CG) comprised of healthy individuals (n=18), age 55.52 ± 7.8 years and a myocardial revascularization group (MRG), comprised of patients with coronary artery disease submitted to myocardial revascularization (n=20), age 58.44 ± 9.3 years. All volunteers were submitted to MIP and Pnsn measurement, and the MRG was evaluated in the preoperative period and on the first postoperative day (PO1

show abstract

Sniff nasal inspiratory pressure: what is the optimal number of sniffs?

Cited by 93 publications

References 10 publications

Sniff nasal inspiratory pressure in children with muscular, chest wall or lung disease

Sniff nasal inspiratory pressure in children with muscular, chest wall or lung disease

Twitch Mouth Pressure and Disease Severity in Subjects With COPD

Evaluation of maximal inspiratory and sniff nasal inspiratory pressures in pre- and postoperative myocardial revascularization

Contact Info

Product

Resources

About