Timing of Oral Feeding Following Head and Neck Mucosal Free Flap Reconstruction: Systematic Review & Meta-Analysis

This systematic review analysed early vs late oral feeding following mucosal free flap reconstruction. Early feeding was associated with reduced fistula formation, pneumonia, and hospital stay. No increase in flap failure or dehiscence. Study heterogeneity and bias limit generalisability.
Timing of Oral Feeding Following Head and Neck Mucosal Free Flap Reconstruction: Systematic Review & Meta-Analysis

In this Journal Club

A systematic review (13 studies, 1657 patients) examined the timing of oral feeding after head and neck mucosal free flap reconstruction. Early feeding (≤5 days) reduced fistulas, pneumonia, and hospital stay without increasing flap failure or dehiscence. Study heterogeneity and selection bias limit generalizability.

5-Point Summary
A systematic review (13 studies) assessed early (≤5 days) vs late oral feeding post-free flap. Early feeding lowered fistula and pneumonia risk and shortened LOS. Flap complications were unchanged. Study quality and consistency were variable.

4-Key Findings
Fistulas: 3.7% (early) vs 11.4% (late). Pneumonia: 6.3% (early) vs 12.4% (late). LOS: 9.85 vs 13.11 days. Flap failure: ~3% in both groups.

3-Critiques
Most studies were retrospective. Feeding timing and complication definitions varied. Radiotherapy impact and flap/site factors were inconsistently reported.

2-Practical Takeaways
Early feeding is safe in selected patients and may reduce complications. Consider integrating early oral intake into ERAS protocols for head and neck recon.

1-Recommended Reading
Kerawala et al. (2021) found early oral intake reduced pneumonia and shortened hospital stay after mucosal free flap surgery without raising fistula risk.

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Note from the Editor


5 Point Summary

This systematic review and meta-analysis synthesises 13 studies (1,657 patients) on timing of oral feeding following head and neck mucosal free flap reconstruction, assessing how early oral intake influences complications, recovery, and hospital stay.

1️⃣ Hypothesis
Early (≤5 days) oral feeding after mucosal free flap reconstruction reduces postoperative complications and hospital length of stay without increasing flap-related risks.
Feeding protocol definitions across included studies

2️⃣ Method
Systematic review and meta-analysis of 13 studies (1,657 patients) comparing early vs late oral feeding. Outcomes included fistula formation, flap failure, pneumonia, dehiscence, haematoma, and length of stay.

3️⃣ Results
Early feeding reduced: Fistulas (3.7% vs 11.4%), Pneumonia (6.3% vs 12.4%), LOS (9.85 vs 13.11 days). Flap failure and dehiscence were equivalent. Data on radiotherapy impact was inconclusive.

4️⃣ Conclusion
Early oral feeding is safe and may enhance recovery. It does not increase wound or flap complications, challenging the traditional “nil-by-mouth” approach post-reconstruction.

5️⃣ Implication
Evidence supports early feeding in carefully selected patients. A standardised, risk-stratified feeding protocol could improve outcomes and reduce hospital burden.


4 Key Findings

This meta-analysis highlights the impact of oral feeding timing on complications, infection risk, and recovery following head and neck mucosal free flap reconstruction.

1️⃣
Fistula Formation
Early feeding significantly reduced fistula rates (3.7%) compared to late feeding (11.4%). This suggests early oral intake may promote mucosal healing and reduce surgical site breakdown.

2️⃣
Pneumonia Reduction
Pneumonia occurred in 6.3% of early-fed patients vs 12.4% in late-fed. Reduced NG tube use and earlier swallowing likely improved airway protection and reduced aspiration risk.

3️⃣
Flap Safety Maintained
Flap failure and dehiscence rates were similar across both groups (~3%). Early oral intake did not compromise flap integrity or vascularity, supporting its safety in appropriate patients.

4️⃣
Shorter Hospital Stay
Early feeding was associated with a mean LOS reduction of over 3 days (9.85 vs 13.11). This has major implications for recovery, resource use, and ERAS pathway integration.
Key clinical outcomes of early and late oral feeding
Key clinical outcomes of early and late oral feeding

3 Critiques

Although impactful, this review is limited by variability in study quality, feeding protocols, and complication definitions across included studies.

1️⃣
Study Quality
The majority of studies were retrospective cohort designs with moderate-to-high risk of bias. Only one RCT was included, limiting the strength of pooled evidence.

2️⃣
Outcome Inconsistency
Complication definitions (e.g., fistula, pneumonia) and feeding timelines varied. Radiotherapy exposure and anatomical subsite were inconsistently reported, affecting comparability.

3️⃣
Protocol Heterogeneity
Feeding protocols (liquid vs soft diet), swallow assessments, and allied health involvement were inconsistently described, making it difficult to evaluate the true influence of early feeding.


2 Practical Takeaways

This review supports a more proactive approach to post-op care, with early feeding emerging as a safe option in selected head and neck free flap patients.

1️⃣
Patient Selection Is Key
Early oral feeding appears safe, but only in well-selected cases with tension-free, well-vascularised mucosal flaps. Caution is still warranted for high-risk reconstructions or irradiated tissue.

2️⃣
Pathway Optimisation
Integrating early oral intake into ERAS pathways may reduce complications and hospital stay. Protocols should include swallow assessments, early NG tube removal, and multidisciplinary support.
Flowchart indicating early oral feeding decision pathway
Flowchart indicating early oral feeding decision pathway

Kerawala et al. (2021) examined early oral feeding following head and neck free flap reconstruction in a prospective UK cohort. Early intake was associated with reduced pneumonia and significantly shorter hospital stay, without increasing fistula risk, making it a key reference supporting ERAS-aligned feeding protocols in reconstructive head and neck surgery.

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