Reliable Lip force measurement in healthy controls and in patients with stroke: methodological study
2008 (English)In: Dysphagia (New York. Print), ISSN 0179-051X, Vol. 23, no 3, 291-296 p.Article in journal (Refereed) Published
A prefabricated oral screen has shown promising results as a muscle self-training device to improve the lip function of stroke patients affected by oropharyngeal dysphagia. However, a technique for the measurement of lip muscle force, whether in healthy individuals or in stroke patients, is lacking. The present study was designed to (1) test the intra- and interreliability of lip force measurements by means of a newly devised Lip Force Meter, LF100, (2) determine a normal lower limit for lip force in newtons (N), and (3) ascertain the instrument's sensitivity and specificity. LF100 is a modified strain gauge for recording the ability of lips to withstand pressure from a predentally placed oral screen. Forty-two healthy controls and 22 stroke patients agreed to participate in the trial. The controls and patients were examined three times with the LF100, with 2-min rest intervals, twice by investigator MH and once by investigator MO. Intrainvestigator reliability with the LF100 proved excellent in both controls and patients: ICC was 0.83 and 0.90, respectively. Interinvestigator reliability was good or excellent in both groups: ICC was 0.71 and 0.91. There was a significant difference in lip force between controls and stroke patients (mean = 24.7 +/- 6.3 N and 9.5 +/- 5.5 N, p < ; 0.001). The sensitivity of LF100 was 91% and the specificity 95%. The cutoff level for normal lip force was 15 N. The LF100 showed itself to be a suitable and reliable instrument for measuring lip force.
Place, publisher, year, edition, pages
2008. Vol. 23, no 3, 291-296 p.
controls, lip force, reliability, sensitivity, specificity, stroke; deglutition, deglutition disorders
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-96517DOI: 10.1007/s00455-007-9143-yISI: 000258673300011PubMedID: 18253790OAI: oai:DiVA.org:uu-96517DiVA: diva2:171118