Hospital Pathways in Extremity Infections

Evidence

This single-study explainer covers a retrospective single-center analysis of hospitalized patients treated for extremity skin and soft tissue infections in orthopedics and trauma surgery at a university maximum care provider between January 2020 and December 2023. The investigators extracted information from routine records on demographics, admission and discharge diagnoses, inflammatory markers, imaging, microbiology, surgical procedures, antibiotic regimens and duration, intensive care unit use, and in-hospital outcomes. The local Institutional Review Board approved the study. The cohort comprised 242 patients, so the report describes an inpatient population rather than the full spectrum of people with extremity skin and soft tissue infections. pmid:42825806

Operative care was common in this selected hospital cohort: 134/242 patients (55.4%) underwent surgery, whereas 108/242 (44.6%) were managed without an operation. The article characterizes the population as carrying a substantial comorbidity burden and reports that sepsis was documented in some patients. The hand, lower leg, and foot were the most frequent infection sites. These descriptive results situate the analysis in a service managing patients whose presentations, documentation, and treatment pathways may differ from those in outpatient or nonsurgical settings. pmid:42825806

Diagnostic classification changed from admission to discharge in 80/242 cases (33.1%). The report presents this as diagnostic evolution during hospitalization, with changing labels reflecting the dynamic and initially uncertain assessment of extremity skin and soft tissue infection. Because the data collection captured both admission and discharge diagnoses, the observed reclassification concerns documentation across the hospital stay. It does not identify whether a particular admission label was accurate, whether each reclassification followed a uniform diagnostic rule, or how individual diagnostic changes related to later outcomes. pmid:42825806

Imaging use was heterogeneous. Computed tomography was performed in 111/242 patients (45.9%), and ultrasound was also used, with patients distributed across computed tomography-only, ultrasound-only, both-modality, and no-imaging pathways. Admission C-reactive protein values were highest in the computed tomography group when compared with the no-imaging and ultrasound-only groups; leukocyte counts showed a similar but less pronounced pattern. The authors also report that computed tomography use clustered with higher operative burden, including more re-interventions among operated patients. These were comparisons among groups defined by care received in routine practice, not randomized imaging assignments. pmid:42825806

Microbiology and antimicrobial treatment were likewise described from routine care. Cultures were frequently negative, and staphylococci and streptococci predominated when cultures were positive. Ampicillin/sulbactam and amoxicillin/clavulanate were the most commonly reported antibiotics, while intravenous combination therapy was frequent. The article links these observations to the practical uncertainty surrounding superficial versus deeper or complicated disease, but its extracted data describe what occurred in this cohort rather than a standardized treatment protocol or a comparative effectiveness test. pmid:42825806

The study also reports a marked decline in inflammatory markers from admission to discharge and describes overall outcomes as favorable, while noting intensive care unit use and in-hospital mortality within the cohort. Those observations were collected alongside management data and therefore provide a hospital-course description. The report does not frame the inflammatory-marker change as an effect attributable to a single imaging pathway, operation, antimicrobial regimen, or diagnostic label. pmid:42825806

Analysis — Diagnostic pathway interpretation

The central observed pattern is one of evolving classification and uneven diagnostic intensity within a hospitalized surgical-service population. Diagnostic reclassification in one-third of cases is consistent with the reported design: clinicians documented an admission impression, accumulated clinical, imaging, microbiological, and procedural information during hospitalization, and recorded a discharge diagnosis. It is not a direct measure of diagnostic error or of the value of any individual reassessment step. pmid:42825806

The computed tomography comparison also requires a selection-based interpretation. Patients receiving computed tomography had higher admission inflammatory activity and greater procedural burden, but imaging was chosen in routine clinical practice rather than assigned by investigators. The pattern is therefore consistent with clinicians selecting computed tomography for patients perceived to have more severe, anatomically uncertain, or complicated presentations. Differences in baseline clinical severity and selection for imaging may explain at least part of the association. The retrospective comparison cannot determine whether computed tomography itself caused differences in procedures, re-interventions, inflammatory trajectories, or hospital outcomes. pmid:42825806

Limitations

The retrospective design cannot establish causation. This was a single-center analysis of inpatients in orthopedic and trauma surgery, and the authors identify selection bias toward patients requiring hospital admission and frequently surgical management. That selection constrains generalizability to other settings and means the comparator groups may have differed in clinical severity before imaging or treatment decisions were made. In particular, the computed tomography, ultrasound-only, and no-imaging groups were formed through usual care rather than random allocation. pmid:42825806

The information was retrospectively extracted from routine clinical documentation. The authors state that detailed comorbidities were not systematically assessed according to predefined criteria, creating potential variation in how patient characteristics were recorded. Heterogeneous documentation and evolving diagnostic labels also limit how precisely the recorded categories can be compared across time. Culture results, imaging choices, procedures, and antibiotic regimens describe care pathways in this cohort; they do not independently resolve the reasons each pathway was chosen for an individual patient. pmid:42825806