Kai Oliver Jensen

Background: Each year, hundreds of thousands of geriatric patients suffer proximal femur fractures, which often result in irreversible functional decline. Although anti-osteoporotic medications have been shown to reduce the incidence of fragility fractures, the effects of pharmacotherapy on fracture injury patterns, postoperative ambulatory capacity, and survival outcomes are not yet fully understood. Methods: We conducted a retrospective cohort study using the AltersTraumaRegister DGU ^® (ATR-DGU), a multicenter prospective registry spanning 196 certified geriatric trauma centers in Germany, Austria, and Switzerland (2016 through 2024). We included patients aged 70 years or older with isolated, surgically treated proximal femur fractures and stratified them by documented use of osteoporosis medication before the index fracture (OM group) versus no pre-fracture therapy (no-OM group). Primary endpoints were mortality during the acute hospital stay and at 120-day follow-up, as well as walking ability—defined as any functional ambulation versus none—at 7 and 120 days postoperatively. The main secondary endpoint was fracture morphology. We fitted multivariable logistic and linear regression models adjusted for age, sex, ASA classification, and anticoagulation; walking-ability models were additionally adjusted for pre-fracture ambulatory status. Results: Of 70,386 patients (mean age, 84.4 years; 70.4% female), 15,771 (22.4%) were receiving osteoporosis medication prior to the index fracture. Patients in the OM group were frailer with worse ASA Scores (80.3% vs. 72.5% with an ASA ≥3) and lower ambulation (62.5% vs. 50.4% requiring at least two crutches or not able to ambulate out of the home environment). Patients in the OM group had a 19% higher chance of sustaining a trochanteric versus a femoral neck fracture than patients in the no-OM group (51.9% vs. 46.8%; adjusted odds ratio 1.19; 95% CI, 1.15 to 1.24; p < 0.001). Pre-existing therapy showed no association with mortality during the acute hospital stay (adjusted OR, 0.93; 95% CI, 0.86 to 1.01; p = 0.098) or with walking ability at 7 days (adjusted OR, 1.03; 95% CI, 0.98 to 1.09; p = 0.198). At the 120-day follow-up (n = 19,544 in the adjusted model follow-up cohort), slightly higher odds of death were observed in the frailer OM group (adjusted OR, 1.12; 95% CI, 1.01 to 1.25; p = 0.04), though the lower confidence bound approached unity. A trend toward improved ambulation was seen in the OM group at 120-day follow-up (adjusted OR, 1.11; 95% CI, 0.99 to 1.25; p = 0.074). Conclusions: Pre-existing osteoporosis therapy was associated with lower odds of femoral neck versus trochanteric fracture patterns. A trend toward improved ambulation accompanied a slightly increased risk of mortality in patients with pre-existing osteoporosis therapy at 120-day follow-up, although this must be weighed against substantial loss to follow-up and residual confounding. More research is needed to understand the effects of anti-osteoporosis medications on patients who do suffer hip fractures despite osteoporotic therapy.

Background/Objectives: The growing elderly population and concomitant increase in physical activity of older adults has led to a growing number of seriously injured elderly patients. The aim of this retrospective cohort study was to investigate the influence of the leading region of injury in severely injured patients on the risk of mortality in different age groups, with focus on elderly patients. Methods: Data from the TraumaRegister DGU^® from 2015 to 2020 were analyzed, including severely injured patients admitted to Swiss, German and Austrian trauma centers. Inclusion criteria were a minimum age of 18 years and an Abbreviated Injury Scale (AIS) score of three or higher in at least one of the body regions. Descriptive analysis and odds ratios for mortality derived from multivariable analysis were calculated, stratified by age and leading region of injury. Results: Out of 213,216 patients, 98,481 met the inclusion criteria. Mortality increased from 6.9% in the control group (18–54 years) to a maximum of 35.9% in the 90+ age group. Leading head injuries had a mortality rate of 22%. The odds ratio for the risk of mortality increased with age and reached a maximum value of 17.0 in the 90+ age group. However, the increase in risk of mortality for leading head injury with increasing age was lower than in the other regions, with an OR of 11.7 in the 90+ age group. In contrast, the group with a leading thoracic injury increased to an OR of 22.5, abdomen to an OR of 75.2 and extremities to an OR of 28.7. Conclusions: The risk of mortality from traumatic head injury is less pronounced in elderly people compared to other injury regions. Our data suggests that traditional scoring systems like the AIS might not display nuances of different injury severities in different age groups, especially for head injuries caused by low-energy trauma and therefore should be reevaluated.

Background: Gustilo-Anderson type III B/C open tibial fractures are among the most complex and high-risk injuries in trauma care. Their management demands a multidisciplinary approach, and early intervention is critical. While early debridement has been established as essential, the optimal timing for definitive orthoplastic coverage remains less clearly defined. Objective: To evaluate whether early orthoplastic coverage reduces the risk of fracture-related infections (FRIs) and complication rates compared to late coverage in type III B/C open tibial fractures. Methods: We conducted a PRISMA-compliant systematic review and meta-analysis of studies comparing early versus late orthoplastic treatment in patients with Gustilo-Anderson III B/C open tibial fractures. Databases included PubMed and EMBASE. Primary outcome was FRI; secondary outcomes included amputation, non-union, and revision surgery rates. Risk of bias was assessed using the Newcastle-Ottawa Scale. Results: Of 3746 studies screened, five studies with a total of 454 patients met the inclusion criteria. Cutoff for early vs. late treatment was defined variably across studies (either within 72–168 h). Meta-analysis showed that early treatment significantly reduced the odds of infection (OR: 0.34; 95% CI: 0.23–0.52; p < 0.001) compared to late treatment. Subgroup analyses confirmed consistent benefits regardless of timing cutoffs or surgical approach (“fix and flap” vs. staged). While trends suggested reduced rates of amputation and non-union with early treatment, these did not reach statistical significance. Conclusion: Early orthoplastic coverage significantly reduces FRI in patients with Gustilo-Anderson III B/C open tibial fractures. While secondary outcomes showed positive trends, further high-quality prospective studies are needed.

Purpose: Our aim was to develop new evidence-based and consensus-based recommendations for the initial inhospital management of lower-extremity injuries in patients with multiple and/or severe trauma. This guideline topic is part of the 2022 update of the German Guideline on the Treatment of Patients with multiple and/or severe Injuries. Methods: MEDLINE and Embase were systematically searched to May 2021. Randomised controlled trials, prospective cohort studies, and comparative registry studies were included if they compared interventions for the initial surgical and non-surgical management of fractures, dislocations or vascular injuries of the lower extremities in patients with multiple and/or severe trauma. We considered patient-relevant clinical outcomes such as mortality, complication rates, length of stay, and function. Risk of bias was assessed using NICE 2012 checklists. The evidence was synthesised narratively, and expert consensus was used to develop recommendations and determine their strength. Results: Eleven studies were identified. They addressed time to definitive fixation (n = 10 studies) and amputation (n = 1). Two new recommendations were developed, one was modified. All recommendations achieved strong consensus. Conclusion: This systematic literature review and subsequent expert consensus process resulted in the following new key recommendations. It is recommended that isolated and multiple lower-extremity fractures are managed with primary definitive fixation in patients whose condition is stable. Patients condition is not considered stable should be managed with primary temporary fixation. In addition, it is recommended that dislocations of the lower extremities are reduced and immobilised as early as possible.

Purpose: Although “tension-band wiring” is still commonly used to stabilize patellar fractures, the technique has recently been scrutinized due to biomechanical insufficiency. Consequently, the AO Foundation renamed the principle to compression cerclage wiring (CCW). Several studies propose favorable outcomes when utilizing locked plating (LP). This study aims to compare outcome of CCW and LP for complex patellar fractures. Methods: A retrospective, single-center cohort study was performed on patients who underwent operative treatment for (AO 34 C-Type) patellar fractures between April 2013 and March 2023. Patients with a 12 month follow up were included. We grouped and compared patients based on the applied treatment strategy: group LP vs. group CCW. Primary outcome parameters included implant-related complications and revision surgeries. Secondary outcomes were length of stay, return to work and 12 months functional outcome (Lysholm score). Odd ratios for complications and revisions were calculated using the conditional Maximum Likelihood Estimate. The threshold for statistical significance was set at p < 0.05. Results: Of 145 patients, 63 could be included (group LP: n = 23 and group CCW: n = 40). Fractures in group LP were significantly more complex in regard to AO Classification (p < 0.001), number of fragments (p < 0.001) and degree of comminution (p < 0.001), yet odds of complications were significantly lower in group LP (OR: 0.147; 95%CI: 0.015–0.742; p = 0.009). K-wire migration was the most common complication in group CCW (20%). Odds of revision surgery were significantly lower in group LP (OR: 0.000; 95%CI: 0.000-1.120; p = 0.041). The average Lysholm score at one year was favorable in both groups (89.8; SD: 11.9 in group LP and 90.6; SD: 9.3 in group CCW; n.s.). Conclusion: In our study cohort, LP was routinely chosen for more complex fracture morphologies; nevertheless the data implies that LP may be considered as the superior fixation technique in regard to complications and revision operations. Especially, K-wire migration occurs frequently after CCW. The one year functional outcome was comparable between the groups, with both demonstrating good results. Prospective randomized studies are indicated to validate our findings.

Methods: Due to demographic change, the number of polytraumatized geriatric patients (> 64 years) is expected to further increase in the coming years. In addition to the particularities of the accident and the associated injury patterns, prolonged inpatient stays are regularly observed in this group. The aim of the evaluation is to identify further factors that cause prolonged inpatient stays. A study of the data from the TraumaRegister DGU® from 2016–2020 was performed. Inclusion criteria were an age of over 64 years, intensive care treatment in the GAS-region, and an Injury Severity Score (ISS) of at least 16 points. All patients who were above the 80th percentile for the average length of stay or average intensive care stay of the study population were defined as so-called long-stay patients. This resulted in a prolonged inpatient stay of > 25 days and an intensive care stay of > 13 days. Among other, the influence of the cause of the accident, injury patterns according to body regions, the occurrence of complications, and the influence of numerous clinical parameters were examined. Results: A total of 23,026 patients with a mean age of 76.6 years and a mean ISS of 24 points were included. Mean ICU length of stay was 11 ± 12.9 days (regular length of stay: 3.9 ± 3.1d vs. prolonged length of stay: 12.8 ± 5.7d) and mean inpatient stay was 22.5 ± 18.9 days (regular length of stay: 20.7 ± 15d vs. 35.7 ± 22.3d). A total of n = 6,447 patients met the criteria for a prolonged length of stay. Among these, patients had one more diagnosis on average (4.6 vs. 5.8 diagnoses) and had a higher ISS (21.8 ± 6 pts. vs. 26.9 ± 9.5 pts.) Independent risk factors for prolonged length of stay were intubation duration greater than 6 days (30-fold increased risk), occurrence of sepsis (4x), attempted suicide (3x), presence of extremity injury (2.3x), occurrence of a thromboembolic event (2.7x), and administration of red blood cell concentrates in the resuscitation room (1.9x). Conclusions: The present analysis identified numerous independent risk factors for significantly prolonged hospitalization of the geriatric polytraumatized patient, which should be given increased attention during treatment. In particular, the need for a smooth transition to psychiatric follow-up treatment or patient-adapted rehabilitative care for geriatric patients with prolonged immobility after extremity injuries is emphasized by these results.

Background/Objective: This prospective, multicenter observational cohort study was carried out in 12 trauma centers in Germany and Switzerland. Its purpose was to evaluate the rate of undertriage, as well as potential consequences, and relate these with different Trauma Team Activation Protocols (TTA-Protocols), as this has not been done before in Germany. Methods: Each trauma center collected the data during a three-month period between December 2019 and February 2021. All 12 participating hospitals are certified as supra-regional trauma centers. Here, we report a subgroup analysis of undertriaged patients. Those included in the study were all consecutive adult patients (age ≥ 18 years) with acute trauma admitted to the emergency department of one of the participating hospitals by the prehospital emergency medical service (EMS) within 6 h after trauma. The data contained information on age, sex, trauma mechanism, pre- and in-hospital physiology, emergency interventions, emergency surgical interventions, intensive care unit (ICU) stay, and death within 48 h. Trauma team activation (TTA) was initiated by the emergency medical services. This should follow the national guidelines for severe trauma using established field triage criteria. We used various denominators, such as ISS, and criteria for the appropriateness of TTA to evaluate the undertriage in four groups. Results: This study included a total of 3754 patients. The average injury severity score was 5.1 points, and 7.0% of cases (n = 261) presented with an injury severity score (ISS) of 16+. TTA was initiated for a total of 974 (26%) patients. In group 1, we evaluated how successful the actual practice in the EMS was in identifying patients with ISS 16+. The undertriage rate was 15.3%, but mortality was lower in the undertriage cohort compared to those with a TTA (5% vs. 10%). In group 2, we evaluated the actual practice of EMS in terms of identifying patients meeting the appropriateness of TTA criteria; this showed a higher undertriage rate of 35.9%, but as seen in group 1, the mortality was lower (5.9% vs. 3.3%). In group 3, we showed that, if the EMS were to strictly follow guideline criteria, the rate of undertriage would be even higher (26.2%) regarding ISS 16+. Using the appropriateness of TTA criteria to define the gold standard for TTA (group 4), 764 cases (20.4%) fulfilled at least one condition for retrospective definition of TTA requirement. Conclusions: Regarding ISS 16+, the rate of undertriage in actual practice was 15.3%, but those patients did not have a higher mortality.

Methods: Due to demographic change, the number of polytraumatized geriatric patients (> 64 years) is expected to further increase in the coming years. In addition to the particularities of the accident and the associated injury patterns, prolonged inpatient stays are regularly observed in this group. The aim of the evaluation is to identify further factors that cause prolonged inpatient stays. A study of the data from the TraumaRegister DGU^® from 2016-2020 was performed. Inclusion criteria were an age of over 64 years, intensive care treatment in the GAS-region, and an Injury Severity Score (ISS) of at least 16 points. All patients who were above the 80th percentile for the average length of stay or average intensive care stay of the study population were defined as so-called long-stay patients. This resulted in a prolonged inpatient stay of > 25 days and an intensive care stay of > 13 days. Among other, the influence of the cause of the accident, injury patterns according to body regions, the occurrence of complications, and the influence of numerous clinical parameters were examined. Results: A total of 23,026 patients with a mean age of 76.6 years and a mean ISS of 24 points were included. Mean ICU length of stay was 11 +/- 12.9 days (regular length of stay: 3.9 +/- 3.1d vs. prolonged length of stay: 12.8 +/- 5.7d) and mean inpatient stay was 22.5 +/- 18.9 days (regular length of stay: 20.7 +/- 15d vs. 35.7 +/- 22.3d). A total of n=6,447 patients met the criteria for a prolonged length of stay. Among these, patients had one more diagnosis on average (4.6 vs. 5.8 diagnoses) and had a higher ISS (21.8 +/- 6 pts. vs. 26.9 +/- 9.5 pts.) Independent risk factors for prolonged length of stay were intubation duration greater than 6 days (30-fold increased risk), occurrence of sepsis (4x), attempted suicide (3x), presence of extremity injury (2.3x), occurrence of a thromboembolic event (2.7x), and administration of red blood cell concentrates in the resuscitation room (1.9x). Conclusions: The present analysis identified numerous independent risk factors for significantly prolonged hospitalization of the geriatric polytraumatized patient, which should be given increased attention during treatment. In particular, the need for a smooth transition to psychiatric follow-up treatment or patient-adapted rehabilitative care for geriatric patients with prolonged immobility after extremity injuries is emphasized by these results.