Median MV duration until weaning , weaning duration , and total MV duration were significantly shorter in the ASV group ( @ -LSB- @-@ -RSB- h vs @ -LSB- @-@ -RSB- h , P = @ ; @ -LSB- @-@ -RSB- h vs @ -LSB- @-@ -RSB- h , P = @ ; and @ -LSB- @-@ -RSB- days vs @ -LSB- @-@ -RSB- days , P = @ , respectively ) .