Skip to main content

Table 3 Results of the spirometry outcomes at baseline (T0) and 30 min after the interscalene block (T30) comparing the anterior and the posterior puncture approaches

From: Phrenic nerve block caused by interscalene brachial plexus block: breathing effects of different sites of injection

Spirometry variable Puncture approach T0    T30   
Median (Q1, Q3) Median differenceanterior-posterior (95 % CI) p-value (two-sided) Median (Q1, Q3) Median differenceanterior-posterior (95 % CI) p-value (two-sided)
VC [l] anterior 5.09 (3.98, 5.58) 0.38 (−0.15, 0.88) 0.167 3.98 (3.31, 4.67) 0.40 (−0.08, 0.88) 0.088
  posterior 4.46 (3.90, 5.37)    3.46 (2.90, 4.34)   
FEV1 [l/s] anterior 3.80 (3.34, 4.33) 0.25 (−0.16, 0.63) 0.174 3.05 (2.41, 3.44) 0.34 (−0.09, 0.72) 0.103
  posterior 3.57 (3.01, 4.11)    2.58 (2.05, 3.22)   
Sniff PmaxPeak [kPa] anterior 6.24 (4.84, 7.67) −0.24 (−1.24, 0.83) 0.655 5.13 (4.21, 7.22) −0.23 (−1.04, 0.56) 0.582
  posterior 6.25 (5.09, 8.63)    5.70 (4.54, 6.83)