Chin tuck for prevention of XXXX : effectiveness and appropriate posture.

@entity1 @entity1109 @entity1282 @entity1173
Chin tuck has been has been widely used to prevent @entity1173 in the @entity1 with @entity1282 . This study was performed to investigate the effectiveness and the degree of optimal neck flexion of chin tuck. Ninety-seven @entity1 who showed @entity1173 in the videofluoroscopic swallow study (VFSS). @entity1 were grouped into the effective ( @entity1 who showed effect with chin tuck) and ineffective group (those who did not show effect with chin tuck). VFSS was performed in neutral and chin tuck position and findings were compared between the groups. Severity of @entity1173 was assessed by the point penetration- @entity1173 scale. Duration of @entity1109 , history of tracheostomy, and other possible contributing factors were also compared. Neck flexion angle was measured to find appropriate posture in which @entity1173 was prevented with chin tuck. Aspiration was reduced or eliminated in only 19 @entity1 (19.6  %) with chin tuck. Oral transit time, pharyngeal delayed time and pharyngeal transit time were significantly shortened in both groups (p  <  0.05), but the difference between the groups was not significant. Female sex and absence of residue in pyriform sinus favored the effect of chin tuck (p  <  0.05). At least 17.5   of neck flexion was required to achieve an effect with chin tuck. The effectiveness of chin tuck was less than anticipated. @entity1 without residue in pyriform sinus were more likely to benefit from chin tuck. Sufficient neck flexion was important in chin tuck to prevent @entity1173 .
