[Prevention of postoperative infections : Risk factors and the current WHO guidelines in musculoskeletal surgery]

Stress-Induced Hyperglycemia is a Risk Factor for Surgical-Site Infections in Nondiabetic Patients with Open Leg Fractures

Background

Nondiabetic patients with open leg fractures who have elevated blood glucose levels on arrival in the emergency department have an increased risk of surgical-site infections (SSIs).

Objective

This study evaluates the association between the incidence of SSIs in nondiabetic patients with an open leg fracture and blood glucose levels registered on arrival in the ER. We also analyzed the correlation between patients' days of hospital stay and the incidence of SSIs and the time elapsed between the damage control with external fixation and final fixation and the incidence of SSI.

Methods

We retrospectively studied nondiabetic patients admitted to our emergency unit from 2017 to 2021 with a diagnosis of open leg fracture consecutively treated. Based on the diagnosis of SSIs, all enrolled patients were divided into two groups based on the developed (group A) or not developed (group B) SSIs within 1 year after surgery. All patients enrolled in the study underwent damage control within 24 hours after admission to the ER. At stabilization of general clinical and local wound conditions, all patients underwent definitive surgery.

Results

We enrolled 80 patients. In group A, glycemia on arrival in the ER was on average 148.35 ± 19.59 mg/dl, and in group B, it was 122.61 ± 22.22 mg/dl (p value: 0.0001). In group A, glycemia in the first postoperative day was on average 113.81 ± 21.07 mg/dl, and in group B, it was 99.02 ± 17.60 mg/dl (p value: 0.001). In group A, the average hospitalization was 57.92 ± 42.43 days, and in group B, it was 18.41 ± 14.21 days (p value: 0.01). Through Youden's J, we therefore analyzed the value with the highest sensitivity and specificity which proved to be 132 mg/dl.

Conclusion

Our findings show that nondiabetic patients with SIH have a significantly increased risk of SSIs compared to patients without SIH within 1 year after surgery. Patients with open leg fractures with SIH have a significantly higher average hospital stay than patients without SIH. Further studies are needed to confirm 132 mg/dl of blood glucose levels as a value to stratify the risk of SSIs in these patients.

[Blast injuries part 2 : Principles of medical treatment]

Explosions can cause severe injuries, which affect multiple organ systems and leave extensive soft tissue defects. In unstable patients, damage control surgery initially focuses exclusively on controlling bleeding and contamination with the aim of preserving life and limbs. The excision of all necrotic tissue, extensive wound irrigation with antiseptic solutions and a calculated antibiotic prophylaxis, which is subsequently adapted to the microbiological findings, are the basis for sufficient infection control. As the tissue damage caused by the pressure surge can regenerate over time as well as become secondarily necrotic (developing wounds), several revision operations are often necessary to assess the viability of tissue in the sense of serial debridement. In the case of extensive soft tissue injuries temporary vacuum-assisted closure (VAC) techniques can bridge the time to the earliest possible definitive plastic surgical wound closure; however, this must not delay the closure of the defect.

Evidence of the medical and economic benefits of implementing hygiene measures by a prevention link physician in trauma surgery: Study protocol for a biphasic multicenter prospective interventional pre-post cohort study using a structured intervention bundle development and tools of behavior change management

Introduction

The German Commission for Hospital Hygiene and Infection Prevention recommends nominating one authorized medical specialist in every medical department as an infection prevention link physician (PLP). It has been roughly described that a PLP serves as a link between the infection prevention team and the respective clinical departments. No detailed evidence about the contribution made by PLPs to the decrease of infection rates is available in Germany. The “HygArzt” project aims to demonstrate the medical and economic benefits of the implementation of hygiene measures by PLP in trauma surgery/orthopedics.

Methods

A multicenter interventional pre/post cohort study design was chosen. The study will run for a three-year period, including a pre-, post-, and an intervention phase, in four different hospitals, one of which will serve as pilot. A complex intervention containing evidence-based infection control measures will be developed and implemented by a PLP to proof efficacy. After the successful implementation of the preventive measures in the pilot hospital, the concept will be transposed to the three remaining trauma and orthopedic departments to confirm the transferability and generalizability. To enable the PLPs of the non-pilot departments, a subject-specific training program will be developed based on the study results of the pilot hospital and offered to the PLPs.

Discussion

Data are intended to provide evidence that and, if so, to which extent the implementation of specific preventive measures by a medical department-specific PLP is possible and results in a reduction of nosocomial infections in orthopedic surgery and traumatology.

Contribution to the literature

The present study describes a novel complex study design to prove the effectiveness of intervention measures for infection prevention. The study design and newly developed methodological approach could serve as a model for similar studies on infection prevention in the future. For the first time, the presented research project “HygArzt” focuses on the implementation of hygiene measures by an infection prevention link physician (PLP) and investigates whether nosocomial infections, especially surgical site infections, can be reduced by the measures implemented.

Trial registration

German clinical Trials register DRKS-ID:00013,296. Registered on March 5, 2018, https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00013296.

Warm Weather and Surgical Site Infections: A Meta-analysis

Seasonal variability, in terms of warm weather, has been demonstrated to be a significant risk factor for surgical site infections (SSIs). However, this remains an underexposed risk factor for SSIs, and many clinicians are not aware of this. Therefore, a systematic review and meta-analysis has been conducted to investigate and quantify this matter.

METHODS

Articles were searched in Embase, Medline Ovid, Web of Science, Cochrane Central, and Google Scholar, and data were extracted from relevant studies. Meta-analysis used random effects models to estimate and compare the pooled odds ratios (OR) and corresponding confidence intervals (CIs) of surgery performed during the warmest period of the year and the colder period of the year.

RESULTS

The systematic review included 20 studies (58,599,475 patients), of which 14 studies (58,441,420 patients) were included for meta-analysis. Various types of surgical procedures across different geographic regions were included. The warmest period of the year was associated with a statistically significant increase in the risk of SSIs (OR 1.39, 95%CI: [1.34-1.45], P < 0.0001). Selection of specific types of surgical procedures (eg, orthopedic or spinal surgery) significantly altered this increased risk.

CONCLUSIONS

The current meta-analysis showed that warm weather seasons are associated with a statistically significant risk increasement of 39% in developing SSIs. This significant risk factor might aid clinicians in preoperative patient information, possible surgical planning adjustment for high risk patients, and potentially specific antibiotic treatments during the warmer weather seasons that could result in decrease of SSIs.

Standardized aseptic dressing change procedure: Optimizations and adherence in a prospective pre- and postintervention cohort study

BACKGROUND

The "HygArzt" project investigated the effectiveness of hygiene measures introduced by an infection prevention link physician (PLP).

OBJECTIVE

To investigate whether the introduction of a standardized aseptic dressing change concept (ADCC) by a PLP can increase hand hygiene adherence and adherence to specific process steps during an aseptic dressing change (ADC) in a trauma surgery and orthopedic department.

METHODS

We defined 4 required hand disinfection indications: (1) before the preparation of ADC equipment, (2) immediately before the ADC, (3) before the clean phase, and (4) after the ADC. A process analysis of the preintervention phase (331 ADCs) was used to develop a standardized ADCC. The ADCC was introduced and iteratively adopted during the intervention phase. The effect was evaluated during the postintervention phase (374 ADCs).

RESULTS

Hand hygiene adherence was significantly increased by the introduction of the ADCC for all indications: (1) before the preparation of the ADC equipment (from 34% before to 85% after, P <.001), (2) immediately before an ADC (from 32% before to 85% after; P < .001), (3) before the clean phase (from 42% before to 96% after; P < .001), and (4) after an ADC (from 74% before to 99% after; P < .001). Overall hand hygiene adherence was analyzed before the indications for an ADC (from 9.6% before to 74% after; P < .001). The same strategy was applied to the following process parameters: use of a clean work surface, clean withdrawal of equipment from the dressing trolley, and appropriate waste disposal.

CONCLUSIONS

A PLP sufficiently implemented a standardized concept for aseptic dressing change during an iterative improvement process, which resulted in a significant improvement in hand hygiene and adherence to other specific ADCC process steps.

Implementation methods of infection prevention measures in orthopedics and traumatology - a systematic review

Background

Prevention of hospital-acquired infections, in the clinical field of orthopedics and traumatology especially surgical site infections, is one of the major concerns of patients and physicians alike. Many studies have been conducted proving effective infection prevention measures. The clinical setting, however, requires strategies to transform this knowledge into practice.

Question/purpose

As part of the HYGArzt-Project (“Proof Of Effectivity And Efficiency Of Implementation Of Infection Prevention (IP) Measures By The Physician Responsible For Infection Prevention Matters In Traumatology/Orthopedics”), the objective of this study was to identify effective implementation strategies for IP (infection prevention) measures in orthopedics and trauma surgery.

Methods

The systematic review was conducted following PRISMA guidelines. A review protocol was drafted prior to the literature search (not registered). Literature search was performed in MEDLINE, SCOPUS and COCHRANE between January 01, 1950 and June 01, 2019. We searched for all papers dealing with infection and infection control measures in orthopedics and traumatology, which were then scanned for implementation contents. All study designs were considered eligible. Exclusion criteria were language other than English or German and insufficient reporting of implementation methods. Analyzed outcome parameters were study design, patient cohort, infection prevention measure, implementation methods, involved personnel, reported outcome of the studies and study period.

Results

The literature search resulted in 8414 citations. 13 records were eligible for analysis (all published between 2001 and 2019). Studies were primarily prospective cohort studies featuring various designs and including single IP measures to multi-measure IP bundles. Described methods of implementation were heterogeneous. Main outcome parameters were increase of adherence (iA) to infection prevention (IP) measures or decrease in surgical site infection rate (dSSI%). Positive results were reported in 11 out of 13 studies. Successful implementation methods were building of a multidisciplinary team (considered in 8 out of 11 successful studies [concerning dSSI% in 5 studies, concerning iA in five studies]), standardization of guidelines (considered in 10/11 successful studies [concerning dSSI% in 5 studies, concerning iA in seven studies]), printed or electronic information material (for patient and/or staff; considered in 9/11 successful studies [concerning dSSI% 4/4, concerning iA 5/5]), audits and regular meetings, personal training and other interactive measures as well as regular feedback (considered in 7/11 successful studies each). Personnel most frequently involved were physicians (of those, most frequently surgeons) and nursing professions.

Conclusion

Although evidence was scarce and quality-inconsistent, we found that adhering to a set of implementation methods focusing on interdisciplinary and interactive /interpersonal work might be an advisable strategy when planning IP improvement interventions in orthopedics and traumatology.

Electronic supplementary material

The online version of this article (10.1007/s00068-020-01477-z) contains supplementary material, which is available to authorized users.