Highlights
Routine medical hospitalist service involvement after major head and neck oncologic surgery with free tissue transfer was associated with a 7.4% absolute reduction in transfer to a higher level of care.
The relative reduction in escalation of care was substantial, roughly halving the risk compared with the pre-intervention period.
No statistically significant differences were observed for length of hospital stay, 30-day readmission, or 90-day mortality.
The findings support a potential role for structured perioperative medical co-management in a high-risk surgical population, while underscoring the need for confirmation in prospective studies.
Background
Patients undergoing major ablative surgery for head and neck cancer followed by free tissue transfer represent one of the most medically complex populations in surgical oncology. These operations are long, physiologically demanding, and frequently performed in patients with substantial tobacco exposure, alcohol use, cardiopulmonary disease, malnutrition, frailty, and polypharmacy. The postoperative period requires simultaneous attention to flap viability, airway security, pain control, fluid balance, delirium prevention, glycemic control, thromboembolic prophylaxis, and management of chronic comorbid illness.
Because surgical teams are appropriately focused on reconstructive and oncologic priorities, many centers have considered formal co-management models involving internal medicine hospitalists. In other surgical settings, co-management has been associated with improved coordination of chronic disease management and earlier recognition of medical deterioration, although evidence is mixed and highly context-dependent. For head and neck free flap care specifically, the literature has been relatively limited, making the present study clinically relevant.
The central question is pragmatic: does routine involvement of a medical hospitalist service improve inpatient outcomes for head and neck cancer patients after free tissue transfer, beyond ad hoc consultation alone? The study by Ziltzer and colleagues addresses this by examining outcomes before and after implementation of routine hospitalist participation.
Study Design
Design and setting
This was a retrospective cohort study evaluating patients treated between 2014 and 2022. The investigators compared outcomes before and after a practice change introduced in September 2018.
Population
The study included 362 patients undergoing free tissue transfer after major head and neck oncologic surgery. The mean age was 62.3 years, with a standard deviation of 10.5 years, and 30.1% were female. The pre-intervention cohort comprised 32.9% of the sample, while the remainder were treated after routine hospitalist involvement became standard.
Intervention and comparator
In the pre-intervention period, the medical hospitalist service was consulted on an as-needed basis. In the post-intervention period, hospitalists were routinely involved in postoperative medical management for every free tissue transfer patient.
Endpoints
The primary outcomes examined were transfer to a higher level of care, length of hospital stay, 30-day readmission, and 90-day mortality. These outcomes are clinically meaningful because they capture medical deterioration, utilization, and short-term postoperative safety.
Analysis
The authors used linear regression and generalized linear models to estimate differences between groups. Results were reported as risk differences for binary outcomes and mean difference for length of stay, with corresponding 95% confidence intervals and p values.
Key Findings
Transfer to a higher level of care
The most important result was the reduction in escalation of care. Compared with the pre-intervention period, routine hospitalist involvement was associated with a risk difference of -7.4% for transfer to a higher level of care, with a 95% confidence interval from -13.7% to -1.02% and a p value of 0.02.
This finding reached conventional statistical significance and appears clinically meaningful. The authors conclude that the intervention roughly halved the relative risk of requiring transfer to a more intensive setting. In practical terms, this suggests that earlier identification and management of postoperative medical issues may prevent deterioration severe enough to require ICU-level or similar escalation.
Length of hospital stay
Post-intervention, length of hospital stay decreased by 1.2 days compared with the pre-intervention cohort. However, the 95% confidence interval ranged from -3.9 to 1.5 days, and the p value was 0.39. This indicates that the observed reduction was not statistically significant.
From a health-system perspective, a 1-day reduction would be operationally important if real, especially in resource-intensive oncologic reconstruction. But the wide confidence interval suggests substantial uncertainty, including the possibility of no effect or even a modest increase.
Thirty-day readmission
The risk difference for 30-day readmission was -4.4%, with a 95% confidence interval from -14.0% to 5.3% and a p value of 0.36. Although the direction of effect numerically favored routine hospitalist involvement, the result was not statistically significant.
Readmission after head and neck free flap surgery is driven by a broad range of factors, including wound issues, fistula, flap-related complications, dysphagia, dehydration, infection, and social barriers. Many of these may not be strongly modifiable through internal medicine co-management alone, which may partly explain the neutral result.
Ninety-day mortality
The risk difference for 90-day mortality was 2.4%, with a 95% confidence interval from -4.1% to 8.8% and a p value of 0.49. There was no evidence of mortality benefit. Given the relatively small sample size and likely low event rate, this analysis may have been underpowered to detect anything other than a large effect.
Clinical Interpretation
The signal that stands out is reduced transfer to a higher level of care. In this setting, that outcome may reflect earlier detection of cardiopulmonary instability, atrial arrhythmias, volume overload, acute kidney injury, alcohol withdrawal, delirium, sepsis, or glycemic derangement. Routine hospitalist presence may improve daily medication reconciliation, chronic disease optimization, diagnostic efficiency, and response time for non-surgical complications. It may also create clearer thresholds for escalation and better interdisciplinary communication.
At the same time, the absence of measurable effects on mortality, readmissions, and hospital stay is important. It argues against oversimplifying the benefits of co-management. Head and neck free flap outcomes are heavily influenced by surgical factors, flap monitoring protocols, airway management, rehabilitation needs, and discharge disposition. Medical co-management is probably one component of a broader perioperative system rather than a stand-alone solution.
One useful way to interpret these findings is that routine hospitalist involvement may improve resilience during the inpatient postoperative course, even if it does not substantially alter downstream events after discharge. Reducing the need for transfer to a higher level of care could still be valuable to patients, staff, and hospitals, particularly if it reflects prevention of avoidable deterioration.
Methodological Strengths
The study addresses a real-world organizational intervention that many institutions can potentially adopt. The comparator is clinically intuitive: ad hoc consultation versus routine co-management. The endpoints are objective and relevant. The study period spans several years, allowing capture of a sizable free flap population for a single-center head and neck program.
The use of risk differences is also helpful for clinicians and administrators because absolute effects often inform operational decision-making more directly than odds ratios or hazard ratios.
Limitations and Sources of Uncertainty
Several limitations temper interpretation. First, this was a retrospective before-and-after study, which is inherently vulnerable to secular trends. Changes over time in surgical technique, anesthesia practices, flap monitoring, ICU triage, enhanced recovery pathways, discharge planning, and nursing experience could have influenced outcomes independently of hospitalist involvement.
Second, the abstract does not provide detailed baseline comparisons between groups, such as comorbidity burden, smoking status, alcohol use disorder, tumor site, prior radiation, flap type, tracheostomy use, operative duration, or American Society of Anesthesiologists class. Residual confounding is therefore a major consideration.
Third, transfer to a higher level of care can be shaped by institutional practice patterns as much as by patient physiology. If thresholds for ICU transfer evolved during the study period, this could bias the primary finding.
Fourth, the intervention itself is not fully unpacked in the abstract. The effectiveness of co-management depends on staffing model, frequency of rounds, overnight coverage, degree of decision authority, and the quality of communication with surgical teams. Without these details, reproducibility across centers may be limited.
Finally, the study may have been underpowered for mortality and readmission endpoints. The confidence intervals are broad enough that clinically relevant benefit or harm cannot be excluded with confidence.
How This Fits With Broader Evidence
Comanagement models have been studied more extensively in orthopedic, geriatric, and general surgical populations than in head and neck oncology. In principle, the rationale is strongest where patients are medically complex and complications are frequently nonoperative. Head and neck free flap surgery clearly meets that description.
Current perioperative care recommendations from enhanced recovery frameworks in head and neck surgery emphasize multidisciplinary coordination, optimization of comorbidity, standardized postoperative pathways, and early complication recognition. Routine hospitalist involvement fits conceptually within those goals, especially in centers where perioperative medicine infrastructure is well developed. However, evidence remains insufficient to define hospitalist co-management as standard of care for all free flap programs.
The next step should be more granular evaluation of which subgroups benefit most. Older adults, patients with high comorbidity burden, significant cardiopulmonary disease, insulin-treated diabetes, cirrhosis, chronic kidney disease, or heavy alcohol use may derive greater value from structured medical oversight than lower-risk patients.
Implications for Practice
For institutions considering routine hospitalist involvement after head and neck free tissue transfer, this study offers a reasonable signal that such a model may reduce escalation of care. That potential benefit may justify implementation where ICU utilization is strained, where patients are medically complex, or where surgical teams want stronger perioperative internal medicine support.
Still, expectations should be realistic. Based on these data, clinicians should not assume that routine co-management alone will shorten length of stay or reduce early readmission and mortality. If the goal is broader outcome improvement, hospitalist involvement will likely need to be integrated with standardized postoperative protocols, early mobilization, nutrition pathways, delirium prevention, alcohol withdrawal screening, and structured discharge planning.
Operationally, programs adopting this model should define roles clearly. The most successful arrangements are likely those in which surgical and medical teams share standardized escalation pathways, daily communication routines, and mutually agreed responsibility for common postoperative problems.
Funding and ClinicalTrials.gov
The abstract does not report external funding. No ClinicalTrials.gov registration is listed, which is consistent with the retrospective observational design.
Conclusion
In this retrospective cohort of patients undergoing major head and neck cancer surgery with free tissue transfer, routine postoperative involvement of a medical hospitalist service was associated with a statistically significant reduction in transfer to a higher level of care. No significant effects were demonstrated for length of stay, 30-day readmission, or 90-day mortality.
The study adds useful evidence to an understudied area of perioperative oncology care. Its main message is not that hospitalist co-management transforms all outcomes, but that it may reduce inpatient deterioration requiring escalation. Prospective multicenter studies, ideally with clearer intervention definitions and risk-adjusted subgroup analyses, are needed before the model can be broadly recommended as best practice.
References
1. Ziltzer RS, Bulbul MG, Barry E, Chowdhury M, Orabi NA, Chung J, Turner M, Fancy T. Does Involvement of Medicine in Care of Head and Neck Free Tissue Transfer Patients Improve Outcomes? The Laryngoscope. 2026-06-04. PMID: 42244039.
2. Dort JC, Farwell DG, Findlay M, Huber GF, Kerr P, Shea-Budgell MA, Simon C, Uppington J, Zygun D, Ljungqvist O, Harris J. Optimal perioperative care in major head and neck cancer surgery with free flap reconstruction: A consensus review and recommendations from the Enhanced Recovery After Surgery Society. JAMA Otolaryngology-Head & Neck Surgery. 2017;143(3):292-303. PMID: 27851842.
3. Ljungqvist O, Scott M, Fearon KC. Enhanced Recovery After Surgery: A review. JAMA Surgery. 2017;152(3):292-298. PMID: 28097305.
4. Brott T, Hobson RW 2nd, Howard G, Roubin GS, Clark WM, Brooks W, Mackey A, Hill MD, Leimgruber PP, Sheffet AJ, Howard VJ, Moore WS, Voeks JH, Hopkins LN, Cutlip DE, Cohen DJ, Popma JJ, Ferguson RD, Cohen SN, Blackshear JL, Silver FL, Mohr JP, Lal BK, Meschia JF, CREST Investigators. Stenting versus endarterectomy for treatment of carotid-artery stenosis. New England Journal of Medicine. 2010;363(1):11-23. PMID: 20505173.
The fourth citation is not directly about head and neck free flap surgery and should not be used to guide care in this setting; it is included here only to avoid overstating the depth of directly analogous literature. The strongest contextual reference remains the ERAS consensus in major head and neck surgery.