Table 3: Manometric characteristics in patients with Jackhammer esophagus.

Total n = 36 ()

DCI values
 Mean overall DCI (mmHg.s.cm)8 100
 Mean DCI among DCI > 8000 (mmHg.s.cm)11 700
 Range of hypercontractile DCI (mmHg.s.cm)8 000 – 47 760

40% hypercontractile contractions24 (67)
50% hypercontractile contractions14 (39)
80% hypercontractile contractions5 (14)

Basal mean LES pressure
 Normal (10 – 45 mmHg)28 (78)
 Hypertonia ( 45 mmHg)8 (22)

LES relaxation
 Normal median IRP ( 20 mmHg)28 (78)
 Elevated median IRP ( 20 mmHg)8 (22)

 Normal mean residual LES pressure ( 8 mmHg)29 (81)
 Elevated mean residual LES pressure ( 8mmHg)7 (19)

DCI: distal contractile integral. LES: lower esophageal sphincter. IRP: integrated relaxation pressure.