Delayed Gastric Emptying (DGE) Grading

Select DGE Grade

No DGE

Tolerating solid diet within expected postoperative timeframe. No nasogastric tube required beyond normal post-op protocol.

Grade A

NG tube required POD 4–7 OR inability to tolerate solid diet by POD 14 (tolerated by POD 21). No major clinical impact. Minor deviation from expected recovery.

Grade B

NG tube required after POD 7 but removed by POD 14 OR solid diet not tolerated by POD 21. Moderate clinical deviation; requires active intervention including prokinetics or enteral support.

Grade C

NG tube required after POD 14 OR NG tube re-insertion required OR solid diet not tolerated by POD 21 AND results in prolonged hospital stay or escalation of care including ICU admission.

None

DGE Grade

No DGE — Normal gastric emptying

Tolerating oral diet as expected. No specific DGE-directed intervention required.

ISGPS DGE Classification

Grade	NG Tube (days)	Diet Tolerability	Clinical Impact	Management
A	POD 4–7	Solids by POD 21	None / minor	Prokinetics, soft diet
B	POD 7–14	Solids not by POD 21	Moderate	NGT / NJT, enteral feeds
C	After POD 14	Solids not by POD 21 + complications	Major	TPN, imaging, re-operation

Pathophysiology and Differential Diagnosis

DGE occurs in 20–50% of pancreaticoduodenectomies (Whipple procedures)
Primary DGE: Intrinsic motor dysfunction — loss of motilin-producing duodenal cells and disruption of the migrating motor complex (MMC) at reconstruction
Secondary DGE: Caused by intra-abdominal complications — must exclude POPF (post-operative pancreatic fistula), intraabdominal abscess, post-pancreatectomy haemorrhage (PPH)
Investigation: CT abdomen (rule out collection, POPF Grade B/C), upper GI contrast study (exclude anastomotic stricture or leak)
Raised drain amylase on POD 3 (>3× upper limit of serum amylase) indicates POPF and should prompt search for secondary DGE

Clinical Application

Prokinetics first-line: Metoclopramide 10 mg TDS, erythromycin 250 mg BD — start early for Grade A/B DGE
NJT enteral feeding preferred over TPN for Grade B — preserves gut integrity, reduces nosocomial infection risk
Pylorus-preserving vs standard Whipple: Similar DGE rates in meta-analyses; pylorus preservation does not increase DGE risk
Early transanastomotic NJT insertion during reconstruction favoured to prevent Grade B/C DGE
Antecolic vs retrocolic gastrojejunostomy: Antecolic route associated with lower DGE rates in some RCTs
Grade C DGE: Consider TPN if enteral route fails; imaging essential to exclude mechanical cause; rarely requires re-operation

References

Wente MN, et al. Delayed gastric emptying (DGE) after pancreatic surgery: a suggested definition by the International Study Group of Pancreatic Surgery (ISGPS). Surgery. 2007;142(5):761–768.

Delayed Gastric Emptying (DGE)

ISGPS DGE Classification

Pathophysiology and Differential Diagnosis

Clinical Application

References

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