Surgical treatment of injuries of the thoracolumbar transition--3: Follow-up examination. Results of a prospective multi-center study by the "Spinal" Study Group of the German Society of Trauma Surgery

OBJECTIVES: Prospective, multicenter study addressing late results after operative treatment of acute thoracolumbar spinal injuries. METHODS: 682 patients (T10-L2) were included and 372 (80%) were postoperatively followed for 2 1/4 years (4-61 months). RESULTS: Comparing the initially included patients (n = 682) with the study group (n = 372), no differences were observed and results were assumed to be representative. A C-type lesion or polytrauma significantly prolonged the hospital stay. The method of operative treatment did not affect the length of the rehabilitation period. Neurological improvement was observed in 3 out of 7 patients with complete, and in 44 out of 64 (69%) with incomplete lesion. The operative method did not affect the improvement rate. The physical capacity significantly decreased. After a mean of 1/2 year of disability only 71% returned to work. 48% returned to their preoperative physical level. The mean Hannover Spine Score was 68 points (preoperative 94, p < 0.001), indicating permanent impairment of function. The angle-stable internal fixator was superior in restoration of spinal alignment and best radiological results were noted after combined stabilization. Posterior stabilization lead to high re-kyphosing. No correlations between radiologic and clinical parameters were observed. CONCLUSIONS: All treatment methods under study were appropriate for achieving comparable clinical and functional outcome. The internal fixator is superior in restoration of the spinal alignment. Best radiological outcome is achieved by combined stabilization. Merely by direct reconstruction of the anterior column the postoperative re-kyphosing is prevented and a gain in segmental angle is achieved.     

Operative Behandlung traumatischer Frakturen der Brust- und Lendenwirbelsäule

In this third and final part, the Spine Study Group (AG WS) of the German Trauma Association (DGU) presents the follow-up (NU) data of its second, prospective, internet-based multicenter study (MCS II) for the treatment of thoracic and lumbar spinal injuries including 865 patients from 8 trauma centers. Part I described in detail the epidemiologic data of the patient collective and the subgroups, whereas part II analyzed the different methods of treatment and radiologic findings. The study period covered the years 2002 to 2006 including a 30-month follow-up period from 01.01.2004 until 31.05.2006. Follow-up data of 638 (74%) patients were collected with a new internet-based database system and analyzed. Results in part III will be presented on the basis of the same characteristic treatment subgroups (OP, KONS, PLASTIE) and surgical treatment subgroups (Dorsal, Ventral, Kombi) in consideration of the level of injury (thoracic spine, thoracolumbar junction, lumbar spine). After the initial treatment and discharge from hospital, the average duration of subsequent inpatient rehabilitation was 4 weeks, which lasted significantly longer in patients with persistent neurologic deficits (mean 10.9 weeks) or polytraumatized patients (mean 8.6 weeks). Following rehabilitation on an inpatient basis, subsequent outpatient rehabilitation lasted on average 4 months. Physical therapy was administered significantly longer to patients with neurologic deficits (mean 8.7 months) or type C injuries (mean 8.6 months). The level of injury had no influence of the duration of the inpatient or outpatient rehabilitation. A total of 382 (72.2%) patients who were either operated from posterior approach only or in a combined postero-anterior approach had an implant removal after an average 12 months. During the follow-up period 56 (8.8%) patients with complications were registered and of these 18 (2.8%) had to have surgical revision. The most common complications reported were infection, loss of correction, or implant-associated complications. Clinical data showed a 2.9 higher relative risk for smokers compared to non-smokers to suffer from wound healing problems. The neurologic status of 81 (60.4%) out of 134 patients with neurologic deficits at the time of injury improved until follow-up. Neurologic deterioration was documented in 8 (1.3%) cases. Complete neurologic deficits after injury to the thoracic spine improved in 9% of the cases, whereas 59% of the cases with complete neurologic deficit improved after injury to the thoracolumbar junction. The surgical approach (posterior or combined postero-anterior) had no significant influence on neurological results at follow-up. Patient age, sex and neurologic deficits showed a statistically significant influence (p<0.05) on the fingertip-floor distance (FBA) at follow-up. Patient back function improved during the follow-up period. More than 2 years after the time of injury 32.2% of the patients had no complaints with respect to back function. The relative frequency of patients with unrestrained back function was greater after posterior surgery (24.2%), than anterior surgery (13.8%), or combined surgery (17.3%) (p=0.005; χ²-test). At follow-up there were no statistically significant differences of unrestrained back function between different levels of injury (thoracic spine 17.4%, TL junction 22.5% and lumbar spine 13.6%). The relative frequency of patients with injury to the thoracolumbar junction who reported ?no complaints from the anterior approach” at follow-up, was calculated to be 55.6% after open versus 63.8% after endoscopic approaches with no significant differences. Of the patients 56.3% reported no donor site morbidity following iliac crest bone harvesting. The VAS spine score at follow-up was calculated within different treatment subgroups: OP 58.4 points, KONS 59.8 points, and PLASTIE 59.7 points. Statistically significant differences of the VAS spine score between posterior (64.9 points) versus combined surgery (47.8 points) were only verified at the level of injury of the thoracic spine (p=0.004). The relative frequency of patients regaining at least 80% of the initial score level was OP (posterior 60.4%, anterior 61.1%, combined 51.4%), 52.9% KONS and 67.6% PLASTIE. After surgery the mean period of incapacity from work was 4 months. Patients with a sedentary occupation before the time of injury were fully reintegrated into work in 71.1% of the cases. Patients with a physical occupation were fully reintegrated in 38.9% of the cases at follow-up. At follow-up 87 (31.2%) patients after posterior and 50 (20.1%) after combined surgery had no restrictions to their recreational activities (p=0.001). Treatment subgroups PLASTIE and KONS show a similar radiological result at follow-up with a bisegmental kyphotic deformity (GDW) of -9° and -8.5°, respectively. With all operative methods it was possible to correct or partly correct the posttraumatic kyphotic deformity. Until follow-up there was a loss of correction depending on the surgical approach and level of injury. Combined postero-anterior stabilization gave statistically significant better radiological results with less kyphotic deformity (-3.8°) than posterior stabilization alone (-6.1°) (p=0.005; ANOVA). Thus combined surgery was superior in its capability to restore spinal alignment within the observational period. At follow-up the use of titanium vertebral body replacement implants (cages) to reconstruct and support the anterior column showed significantly better radiological results with less kyphotic deformity and loss of correction (GDW 0.3°) than the use of iliac bone strut grafts (-3.7°) (p<0.001). Neither additional anterior plates nor the combination of anterior plates with a cage or bone graft had a statistically significant influence on the kyphotic deformity measured at follow-up. A matched-pair analysis of anterior surgery alone versus combined surgery for the treatment of compression fractures (type A) at the thoracolumbar junction showed a significantly greater intraoperative blood loss but better radiological results in terms of monosegmental and bisegmental kyphotic deformity after combined surgery (p<0.05). A matched-pair analysis of treatment results between non-operative and operative treatment for burst fractures (type A3.1-2) showed a period of inability to work (6 months) which was twice as long for the non-operative treatment group. At the same time significantly better radiological results at follow-up were achieved after operative treatment of these fractures (p<0.05).     

COVID-19 and Proximal Femur Fracture in Older Adults—A Lethal Combination? An Analysis of the Registry for Geriatric Trauma (ATR-DGU)

ObjectivesCOVID-19 can be a life-threatening illness, especially for older patients. The COVID-19 outbreak created a dramatic organizational challenge in treating infected patients requiring surgical treatment, like those suffering a proximal femur fracture, in a pandemic setting. We investigate the impact of a COVID-19 infection in patients with a proximal femur fracture not only on mortality but also on quality of life (QoL), length of stay, and discharge target.DesignRetrospective cohort analysis from July 1, 2020, to December 31, 2020. The Registry for Geriatric Trauma collected the data prospectively. Patient groups with and without COVID-19 infection were compared using linear and logistic regression models.Setting and ParticipantsRetrospective multicenter registry study including patients aged ≥70 years with proximal femur fracture requiring surgery from 107 certified Centers for Geriatric Trauma in Germany, Austria, and Switzerland.MeasuresThe occurrence and impact of COVID-19 infection in patients suffering a proximal femur fracture were measured regarding in-house mortality, length of stay, and discharge location. Moreover, QoL was measured by the validated EQ-5D-3L questionnaire.ResultsA total of 3733 patients were included in our study. Of them, 123 patients tested COVID-19 positive at admission. A COVID-19 infection resulted in a 5.95-fold higher mortality risk (odds ratio 5.95, P < .001], a length of stay prolonged by 4.21 days [regression coefficient (β) 4.21, P < .001], a reduced QoL (β ?0.13, P = .001), and a change in discharge target, more likely to their home instead of another inpatient facility like a rehabilitation clinic (P = .013).Conclusions and ImplicationsThe impact of a COVID-19 infection in patients suffering a proximal femur fracture is tremendous. The infected patients presented a dramatic rise in mortality rate, were significantly less likely to be discharged to a rehabilitation facility, had a longer in-hospital stay, and a reduced QoL.     

Operative treatment of 733 patients with acute thoracolumbar spinal injuries: comprehensive results from the second, prospective, internet-based multicenter study of the Spine Study Group of the German Association of Trauma Surgery

The second, internet-based multicenter study (MCSII) of the Spine Study Group of the German Association of Trauma Surgery (Deutsche Gesellschaft für Unfallchirurgie) is a representative patient collection of acute traumatic thoracolumbar (T1–L5) injuries. The MCSII results are an update of those obtained with the first multicenter study (MCSI) more than a decade ago. The aim of the study was to assess and bring into focus: the (1) epidemiologic data, (2) surgical and radiological outcome, and (3) 2-year follow-up (FU) results of these injuries. According to the Magerl/AO classification, there were 424 (57.8%) compression fractures (A type), 178 (24.3%) distractions injuries (B type), and 131 (17.9%) rotational injuries (C type). B and C type injuries carried a higher risk for neurological deficits, concomitant injuries, and multiple vertebral fractures. The level of injury was located at the thoracolumbar junction (T11–L2) in 67.0% of the case. 380 (51.8%) patients were operated on by posterior stabilization and instrumentation alone (POSTERIOR), 34 (4.6%) had an anterior procedure (ANTERIOR), and 319 (43.5%) patients were treated with combined posteroanterior surgery (COMBINED). 65% of patients with thoracic (T1–T10) and 57% with lumbar spinal (L3–L5) injuries were treated with a single posterior approach (POSTERIOR). 47% of the patients with thoracolumbar junction (T11–L2) injuries were either operated from posterior or with a combined posterior–anterior surgery (COMBINED) each. Short angular stable implant systems have replaced conventional non-angular stable instrumentation systems to a large extent. The posttraumatic deformity was restored best with COMBINED surgery. T-spine injuries were accompanied by a higher number and more severe neurologic deficits than TL junction or L-spine injuries. At the same time T-spine injuries showed less potential for neurologic recovery especially in paraplegic (Frankel/AISA A) patients. 5% of all patients required revision surgery for perioperative complications. Follow-up data of 558 (76.1%) patients were available and collected during a 30-month period from 1 January 2004 until 31 May 2006. On average, a posterior implant removal was carried out in a total of 382 COMBINED and POSTERIOR patients 12 months after the initial surgery. On average, the rehabilitation process required 3–4 weeks of inpatient treatment, followed by another 4 months of outpatient therapy and was significantly shorter when compared with MCSI in the mid-1990s. From the time of injury until FU, 80 (60.6%) of 132 patients with initial neurological deficits improved at least one grade on the Frankel/ASIA Scale; 8 (1.3%) patients deteriorated. A higher recovery rate was observed for incomplete neurological injuries (73%) than complete neurological injuries (44%). Different surgical approaches did not have a significant influence on the neurologic recovery until FU. Nevertheless, neurological deficits are the most important factors for the functional outcome and prognosis of TL spinal injuries. POSTERIOR patients had a better functional and subjective outcome at FU than COMBINED patients. However, the posttraumatic radiological deformity was best corrected in COMBINED patients and showed significantly less residual kyphotic deformity (biseg GDW −3.8° COMBINED vs. −6.1° POSTERIOR) at FU (p = 0.005). The sagittal spinal alignment was better maintained when using vertebral body replacement implants (cages) in comparison to iliac strut grafts. Additional anterior plate systems did not have a significant influence on the radiological FU results. In conclusion, comprehensive data of a large patient population with acute thoracolumbar spinal injuries has been obtained and analyzed with this prospective internet-based multicenter study. Thus, updated results and the clinical outcome of the current operative treatment strategies in participating German and Austrian trauma centers have been presented. Nevertheless, it was not possible to answer all remaining questions to contradictory findings of the subjective, clinical outcome and corresponding radiological findings between different surgical subgroups. Randomized-controlled long-term investigations seem mandatory and the next step in future clinical research of Spine Study Group of the German Trauma Society.     

Which factors influence the need for inpatient rehabilitation after severe trauma?

IntroductionDespite the importance of rehabilitation in the treatment of patients with severe trauma or even of severely injured patients, the cooperation between acute and rehabilitation hospitals is often inadequate. The present study aims to identify factors that make it probable that a severely injured patient requires inpatient rehabilitation following the acute treatment.Material and methodsA retrospective analysis of 75.357 cases from the TraumaRegister DGU^® (TR-DGU) was performed. All cases from 2002 until 2013 with an ISS ≥ 9, who were taken to the ICU were included. Regarding the discharge destination the subgroups “at home” and “rehabilitation hospital” were analyzed in detail. Finally, we performed a multivariate regression analysis based on the parameters previously collected.Results24.208 patients (32.1%) were transferred to a rehabilitation clinic. In the multivariate regression analysis the most relevant independent parameters for discharge in a rehabilitation hospital were age (18–54: OR 1.65; 55–74: OR 2.86 and 75 and older: OR 5.07, all p ≤ 0.001), AIS pelvis ≥ 2 (OD 1.94), AIS legs (OR 2.02), AIS spine (AIS 4: OR 5.78 and AIS 5–6: OR 6.36) and the AIS head (AIS 3: OR 1.88; AIS 4: OR 3.11 and AIS 5–6: OR 7.55) (all p ≤ 0.001). The length of stay in the ICU (3–7 days: OR 1.88; 8–28 Days: OR 5.42 and 29 and more days: OR 14.7, all p ≤ 0.001) was also a relevant parameter. The overall ISS presented no relevant influence with an OR of 1.02 (p = 0.03).Discussion and conclusionKnowing independent factors for a required inpatient rehabilitation helps the treating physicians to identify the patients at an early stage in acute hospitals. So the transfer to a rehabilitation clinic can be organized faster and more selective in future.     

Beyond low-density lipoprotein cholesterol: defining the role of low-density lipoprotein heterogeneity in coronary artery disease

Recent clinical trials in patients with coronary artery disease (CAD) provide evidence that low-density lipoprotein cholesterol (LDL-C) levels should be lowered even further to prevent recurrent CAD. However, despite more aggressive interventions for lowering LDL-C levels, the majority of CAD events go undeterred, perhaps related to the fact that intervention was not started earlier in life or that LDL-C levels represent an incomplete picture of atherogenic potential. Nevertheless, LDL-C remains the contemporary standard as the primary goal for aggressive LDL reduction. If triglycerides are >200 mg/dl, the measurement of non-high-density lipoprotein cholesterol (HDL-C) is recommended. Measurement of apolipoprotein (apo)B has been shown in nearly all studies to outperform LDL-C and non-HDL-C as a predictor of CAD events and as an index of residual CAD risk. This is because apoB reflects the total number of atherogenic apoB-containing lipoproteins and is a superior predictor of the number of low-density lipoprotein particles (LDL-P). Estimates of LDL-P and size can also be made by nuclear magnetic resonance spectroscopy, density gradient ultracentrifugation, and gradient gel electrophoresis. Although a number of studies show that such estimates predict CAD, LDL-P, and size often accompany low HDL-C and high triglyceride levels, and therefore such additional lipoprotein testing has not been recommended for routine screening and follow-up. Because apoB is a superior predictor of LDL-P, we recommend that apoB and the apoB/apoA-I ratio be determined after measurement of LDL-C, non-HDL-C, and the ratio of total cholesterol/HDL-C to better predict CAD and assess efficacy of treatment.     

Reduction in mortality in severely injured patients following the introduction of the “treatment of patients with severe and multiple injuries” guideline of the German society of trauma surgery – a retrospective analysis of a level 1 trauma center (2010–2012)

Objective

The German society of trauma surgery published the “Treatment of Patients with Severe and Multiple injuries” guideline in 2011. This achieved the highest level of recommendation for guidelines published in Germany. This study investigated if there was an improvement in the survival rates of severed injured patients following the introduction of the guideline in clinical treatment.

Methods

All patients with an injury severity score ≥16 on primary admission to hospital between January 2010 and December 2012 (a total of 373 patients) were included in this study. The data for these patients were collected from the German Trauma Registry and from patients’ hospital records. Patients who were treated in 2010 were compared with patients who were treated in 2011 and 2012, following the introduction of the “treatment of patients with severe and multiple injuries” guideline in the authors’ clinic at the beginning of 2011.

Results

Significant differences were found in ISS, RTS, New ISS, and TRISS between 2010 and 2011/2012. No differences were found in the severity of injury when classified by different body regions. Major differences were found in the total volume replacement, the length of emergency surgery, the length of surgery performed within the first 24 h and the rate of whole-body computed tomography. The mortality rate dropped from 32.48% in 2010 to 18.75% in 2011/2012 (p = 0.003).

Conclusions

The introduction and use of a guideline-based medical care regime for severely injured patients might reduce the rate of mortality.