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The parameters of short reflex expirations induced by mechanical stimulation of the trachea (ERt) and expiration reflexes from the glottis (ERg). |
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| ERt |
ERg |
p (test) |
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| Number of cats |
50 |
31 |
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| Excitability (responses/trials) |
67.6% |
99.5% |
< 0.001 (F) |
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| Cats with several ERt/ERg ≥ 0.2 kPa |
28 (out of 50) |
27 (out of 31) |
< 0.01 (F) |
| Duration of ABD |
63 ± 3 ms |
70 ± 3 ms |
NS (t) |
| T (onset of ABD – ABD peak) |
36 ± 3 ms |
39 ± 2 ms |
NS (t) |
| Relative amplitude of ABD |
36 ± 4% |
60 ± 9% |
< 0.02 (W) |
| Expiatory pressure amplitude |
0.49 ± 0.04 kPa |
1.02 ± 0.16 kPa |
< 0.01 (W) |
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| Number of cats – PCA |
23 |
22 |
NS (F) |
| T (onset of PCA – ABD peak) |
52 ± 3 ms |
61 ± 4 ms |
NS (t) |
| T (peak of PCA – ABD peak) |
14 ± 2 ms |
25 ± 4 ms |
< 0.02 (W) |
| T (ABD peak – offset of PCA) |
24 ± 3 ms |
18 ± 6 ms |
NS (W) |
| Relative amplitude of PCA |
67 ± 12% |
137 ± 23% |
< 0.001 (M) |
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| Number of cats – ThAr |
20 |
22 |
NS (F) |
| T (onset of ThAr – ABD peak) |
77 ± 4 ms |
74 ± 6 ms |
NS (W) |
| T (peak of ThAr – ABD peak) |
44 ± 3 ms |
43 ± 3 ms |
NS (t) |
| T (ABD peak – minimum of ThAr) |
7 ± 4 ms |
21 ± 8 ms |
NS (W) |
| T (ABD peak – 2nd peak of ThAr) |
140 ± 20 ms |
130 ± 10 ms |
NS (W) |
| T (ABD peak – offset of ThAr) |
440 ± 40 ms |
730 ± 60 ms |
< 0.001 (W) |
| Relative amplitude of 1st ThAr peak |
83 ± 10% |
385 ± 77% |
< 0.001 (W) |
| Relative amplitude of 2nd ThAr peak |
85 ± 20% |
311 ± 70% |
< 0.01 (W) |
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ABD, PCA, and ThAr, EMG activities of abdominal, posterior cricoarytenoid, and thyroarytenoid muscles during ERt or ERg; T (onset of ABD – ABD peak), the time interval from the beginning of the burst of ABD to the moment when the maximum of the moving average was reached (amplitude of ABD moving average); other time intervals (T) were measured as described in the table; p (test), the level of statistical significance and in brackets the appropriate test used; NS, non-significant (p > 0.05); F, Fisher's test; t, unpaired t-test; W, Welch corrected unpaired t-test; M, Mann-Whitney test. | |||
Poliacek et al. Cough 2008 4:1 doi:10.1186/1745-9974-4-1 |
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