Comparative Evaluation of the Sniffing Position with Simple Head Extension for Laryngoscopic View and Intubation Difficulty in Adults Undergoing Elective Surgery

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td align="left" rowspan="2">Cormack and Lehane</td><td align="center">Sniffing position</td><td align="center">Simple extension</td><td align="center" rowspan="2"><svg height="10.325" id="M34" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.75 10.325" width="11.75" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.325)">
<g transform="translate(72,-63.74)">
<text transform="matrix(1,0,0,-1,-71.95,63.79)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑃</tspan>
</text>
</g>
</g>
</svg> value</td></tr><tr><td align="center">(<svg height="11.0375" id="M35" style="vertical-align:-0.27588pt" version="1.1" viewbox="0 0 42.912498 11.0375" width="42.912498" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,11.0375)">
<g transform="translate(72,-63.17)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑛</tspan>
<tspan style="font-size: 12.50px; " x="9.6773224" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="21.71771" y="0">9</tspan>
<tspan style="font-size: 12.50px; " x="27.969212" y="0">0</tspan>
</text>
</g>
</g>
</svg>)</td><td align="center">(<svg height="10.9125" id="M36" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 50.724998 10.9125" width="50.724998" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.9125)">
<g transform="translate(72,-63.27)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑛</tspan>
<tspan style="font-size: 12.50px; " x="9.6773224" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="21.71771" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="27.969212" y="0">1</tspan>
<tspan style="font-size: 12.50px; " x="34.220711" y="0">8</tspan>
</text>
</g>
</g>
</svg>) </td></tr><tr><td align="center" colspan="4"><hr/></td></tr><tr><td align="left">Grade 1</td><td align="center">57 (63.3)</td><td align="center">92 (78.0)</td><td align="center">0.04</td></tr><tr><td align="left">Grade 2</td><td align="center">32 (35.6)</td><td align="center">26 (22.0)</td><td align="center"></td></tr><tr><td align="left">Grade 3</td><td align="center">1 (0.01)</td><td align="center">0 (0)</td><td align="center"></td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td>Values are numbers (percent).<br/></td></tr></table>

Comparison of views obtained during laryngoscopy following external laryngeal manipulation.

Anesthesiology Research and Practice

tab3

Table 3

Table 3: Comparative Evaluation of the Sniffing Position with Simple Head Extension for Laryngoscopic View and Intubation Difficulty in Adults Undergoing Elective Surgery 

Table 3 | Comparative Evaluation of the Sniffing Position with Simple Head Extension for Laryngoscopic View and Intubation Difficulty in Adults Undergoing Elective Surgery 