scholarly journals The inter-individual anatomical variation of the trochlear notch as a predisposition for simple elbow dislocation

Author(s):  
Sofia Kilgus ◽  
Christian Eder ◽  
Paul Siegert ◽  
Philipp Moroder ◽  
Elke Zimmermann ◽  
...  

Abstract Purpose Besides the multi-layered capsule–ligamentous complex of the elbow joint the high bony congruence in the ulnohumeral joint contributes to elbow stability. Therefore, we assume that specific anatomical configurations of the trochlear notch predispose to dislocation. In case of ligamentous elbow dislocation both conservative and surgical treatment is possible without a clear treatment algorithm. Findings of constitutional bony configurations could help deciding for the best treatment option. Methods In this retrospective matched-pair analysis we compared MRI imaging from patients sustaining a primary traumatic elbow dislocation (instability group) with patients suffering from chronic lateral epicondylitis (control group), treated between 2009 and 2019. Two independent observers measured different anatomical landmarks of the trochlear notch in a multiplanar reconstructed standardized sagittal trochlear plane (SSTP). Primarily, opening angle and relative depth of the trochlear notch were determined. After adjustment to the proximal ulnar rim in the SSTP, coronoid and olecranon angle, the articular angle as well as the ratio of the tip heights of the trochlear notch were measured. Results We compared 34 patients in the instability group (age 48 ± 14 years, f/m 19/15) with 34 patients in the control group (age 47 ± 16 years, f/m 19/15). Instability group showed a significantly larger opening angle (94.1° ± 6.9° vs. 88.5° ± 6.9°, p = 0.0002), olecranon angle (60.9° ± 5.3° vs. 56.1° ± 5.1°, p < 0.0001) and articular angle (24.7° ± 6.4° vs. 22.3° ± 5.8°, p = 0.02) compared to the control group. Measuring the height from the coronoid (ch) and olecranon (oh) tip also revealed a significantly larger tip ratio (tr = ch/oh) in the instability group (2.7 ± 0.8 vs. 2.2 ± 0.5, p < 0.0001). The relative depth (61.0% ± 8.3% vs. 62.7% ± 6.0%, p = 0.21) of the trochlear notch as well as the coronoid angle (32.8° ± 4.5° vs. 31.7° ± 5.2°, p = 0.30) showed no significant difference in the instability group compared to the control group. The interrater reliability of all measurements was between 0.83 and 0.94. Conclusion MRI of patients with elbow dislocation show that there seems to be a bony anatomical predisposition. According to the results, it seems reasonable to include predisposing bony factors in the decision-making process when surgical stabilization and conservative treatment is possible. Further biomechanical studies should prove these assumptions to generate critical bony values helping surgeons with decision making. Level of evidence III.

2018 ◽  
Vol 39 (12) ◽  
pp. 1487-1496 ◽  
Author(s):  
Arne Burssens ◽  
Hannes Vermue ◽  
Alexej Barg ◽  
Nicola Krähenbühl ◽  
Jan Victor ◽  
...  

Background: Diagnosis and operative treatment of syndesmotic ankle injuries remain challenging due to the limitations of 2-dimensional imaging. The aim of this study was therefore to develop a reproducible method to quantify the displacement of a syndesmotic lesion based on 3-dimensional computed imaging techniques. Methods: Eighteen patients with a unilateral syndesmotic lesion were included. Bilateral imaging was performed with weightbearing cone-beam computed tomography (CT) in case of a high ankle sprain (n = 12) and by nonweightbearing CT in case of a fracture-associated syndesmotic lesion (n = 6). The healthy ankle was used as a template after being mirrored and superimposed on the contralateral ankle. The following anatomical landmarks of the distal fibula were computed: the most lateral aspect of the lateral malleolus and the anterior and posterior tubercle. The change in position of these landmarks relative to the stationary, healthy fibula was used to quantify the syndesmotic lesion. A control group of 7 studies was used. Results: The main clinical relevant findings demonstrated a statistically significant difference between the mean mediolateral diastasis of both the sprained (mean [SD], 1.6 [1.0] mm) and the fracture group (mean [SD], 1.7 [0.6] mm) compared to the control group ( P < .001). The mean external rotation was statistically different when comparing the sprained (mean [SD], 4.7 [2.7] degrees) and the fracture group (mean [SD], 7.0 [7.1] degrees) to the control group ( P < .05). Conclusion: This study evaluated an effective method for quantifying a unilateral syndesmotic lesion of the ankle. Applications in clinical practice could improve diagnostic accuracy and potentially aid in preoperative planning by determining which correction needs to be achieved to have the fibula correctly reduced in the syndesmosis. Level of Evidence: Level III, retrospective comparative study.


Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 2283-2283
Author(s):  
Nadira Durakovic ◽  
Ana Boban ◽  
Mirando Mrsic ◽  
Dubravka Sertic ◽  
Ranka Serventi Seiwerth ◽  
...  

Abstract Infections due to multidrug-resistant (MDR) Gram-negative bacteria have been increasing and they are an important cause of nosocomial morbidity and mortality, especially in immunocompromised patients. In order to determine efficacy and safety of colistin (colistimethate sodium) use in the treatment of MDR Pseudomonas aeruginosa sensitive to colistin, a comparison of renal function, other toxicities, and outcome of therapy was done between a group of patients treated with colistin and patients treated with other antipseudomonas drugs as control group. A group of 26 patients that was hospitalized in our institution between February 2002 and December 2006 and treated with intravenous colistin for an infection caused by MDR P.aeruginosa was compared in a matched-pair analysis to a group of 26 patients treated with other antipseudomonas drugs. Patients were 52% male and 48% female; mean age was 37 years (range 17–63). All of the patients were treated for haematological malignancy, most received intensive chemotherapy regimens (44%), 19% received allogeneic and 31% autologous transplants. Groups of patients did not differ in age, sex, disease, or kind of treatment received. All of the patients in both groups had clinical signs of sepsis; in 69% of patients from colistin group and 84% from control group P.aeruginosa was isolated from blood, and in 27% and 12% it was isolated from skin lesions that had clinical presentation of echtyma gangrenosum, respectively. Patients treated with colistin received 3 MU of colistin every 8 hours for a mean (± SD) duration of 12.5 (± 5.4) days. Due to nature of their disease, and severity of infections, all of the patients received more than two other possibly nephrotoxic drugs; in colistin group 4 other concomitant drugs, on control group 3; most frequently vancomycin, cefepime, amikacine, garamycine and amphotericine B deoxycholate was used. Of 26 patients receiving colistin, 76.9% of patients had the drug discontinued after successful clearance of infection, while in control group 65.4% of patients had the drug discontinued due to same reason. Only one patient had displayed neurological toxicity (Jacksons attack with secondary generalisation), but the drug was not discontinued, dose was modified, patient had no further attacks. There was no statistically significant difference in the level of serum creatinine, creatinine clearance (calculated), or potassium levels between prior to therapy and after treatment discontinuation between groups. One patient treated with colistin developed renal failure and was subjected to continuous venovenous hemodiafiltration; of note is that at the time colistin introduction patient already had impaired renal function. In one patient drug was discontinued due to suspected allergic reaction. No other adverse events of colistin therapy were noted. Colistin is an effective antimicrobial drug for the treatment of severe infections caused by MDR P.aeruginosa in haematological patients. The safety profile observed is acceptable in these severe life-threatening infections, in matched-pair analysis it did not display greater toxicity than other antipseudomonas drugs. Further studies are needed to better address the treatment of MDR P. aeruginosa, naimely the optimal dose and schedule, also route of administration of colistin, as well as drug-to-drug interactions.


Diagnostics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Henryk Haffer ◽  
Luis Becker ◽  
Michael Putzier ◽  
Mats Wiethölter ◽  
Katharina Ziegeler ◽  
...  

Functional spinopelvic parameters are crucial for describing spinal alignment (SA), but this is susceptible to variation. Anatomically fixed pelvic shape is defined by the parameters pelvic radius (PR), pelvic incidence (PI), and sacral table angle (STA). In patients with lumbosacral transitional vertebrae (LSTV), the spinopelvic alignment may be altered by changes of these parameters and influences of SA. There have been no reports studying the relation between LSTV, four (4 LV) and six (6 LV) lumbar vertebrae, and fixed anatomical spinopelvic parameters. A retrospective analysis of 819 abdomen–pelvis CT scans was performed, identifying 53 patients with LSTV. In a matched-pair analysis, we analyzed the influence of LSTV and the subgroups 4 LV (n = 9) and 6 LV (n = 11) on PR, PI, and STA. LSTV were classified according to Castellvi classification. In patients with 6 LV, measurement points at the superior endplates of S1 and S2 were compared. The prevalence of LSTV was 6.5% (53/819), 6 LV was 1.3% (11/819), and 4 LV was 1.1% (9/819) in our study population. PI significantly increased (p < 0.001), STA significantly decreased (p < 0.001), and PR (p = 0.051) did not differ significantly in the LSTV group (n = 53). Similar findings were observed in the 4 LV subgroup, with an increase in PI (p < 0.021), decrease in STA (p < 0.011), and no significant difference in PR (p < 0.678). The same results were obtained in the 6 LV subgroup at measuring point S2 (true S1) PI (p = 0.010), STA (p = 0.004), and PR (p = 0.859), but not at measuring point S1 (true L6). Patients with LSTV, 4 LV, and 6 LV showed significant differences in PI and STA compared to the matched control group. PR showed no significant differences. The altered spinopelvic anatomy in LSTV patients need to be reflected in preoperative planning rebalancing the sagittal SA.


2020 ◽  
Vol 8 (7_suppl6) ◽  
pp. 2325967120S0042
Author(s):  
Benjamin Domb ◽  
Sarah Chen ◽  
Rafael Walker-Santiago ◽  
Jacob Shapira ◽  
Philip Rosinsky ◽  
...  

Objectives: (1) To report minimum five-year patient reported outcomes (PROs) in borderline dysplastic patients with ligamentum teres (LT) tears who underwent hip arthroscopy and (2) to compare these PROs to a pair-matched control group of borderline dysplastic hips without LT tears. Methods: Data was prospectively collected for patients who underwent hip arthroscopy during September 2008 and August 2013. Patients were included if had a preoperative diagnosis of borderline dysplasia [lateral center-edge angle (LCEA) of 18°- 25°] and had preoperative and minimum five-year postoperative modified Harris Hip Scores (mHHS), Non-Arthritic Hip Scores (NAHS), and Visual Analogue Scale for pain (VAS) scores. Exclusion criteria were Tönnis grade osteoarthritis >1, previous hip conditions, any prior ipsilateral hip surgery, or workers’ compensation status. Two borderline dysplastic groups were created. An LT tear group was matched 1:1 to a control group (no LT tear) with similar age, sex, body mass index (BMI), and laterality via propensity score matching. Significance was set at P < 0.05. Results: 24 LT tear patients (24 hips) were matched 24 patients (24 hips) without an LT tear. There was no significant difference in age, sex, BMI, or laterality between groups. Mean age was 36.2 ± 17.2 and 34.9 ± 15.9 years for the control and LT tear group, respectively (P = 0.783). There were 17 (70.8%) and 16 (66.7%) females in the control and LT tear group, respectively and the mean preoperative LCEA was 23.3° and 22.2° in the control and LT tear group, respectively. No differences were observed between groups in baseline PROs, intraoperative findings, or surgical procedures, except for LT treatment. Five-year postoperative PROs were comparable in both groups, with the control group exhibiting superior Veterans RAND 12-Item Health Survey Mental Component (VR-12M) (P = 0.041) and Short Format 12 Mental Health (SF-12M) (P = 0.042). The control group exhibited less pain and higher satisfaction with surgery; however, this trend was not significant. Finally, the LT tear group was significantly less likely to achieve the patient acceptable symptomatic state (PASS) for mHHS (P = 0.022). Conclusion: Following hip arthroscopy, patients with borderline dysplasia and LT tears demonstrated favorable PROs at minimum five-year follow-up. Outcomes were similar to a pair-matched control group without LT tears, with the control group showing higher VR-12M and SF-12M scores. Furthermore, borderline dysplastic patients with LT tears were significantly less likely to achieve the PASS for mHHS.


2010 ◽  
Vol 112 (4) ◽  
pp. 709-713 ◽  
Author(s):  
Serdar Geyik ◽  
Ozgur Ertugrul ◽  
Kivilcim Yavuz ◽  
Pinar Geyik ◽  
Isil Saatci ◽  
...  

Object The primary goal of this matched-pair analysis was to evaluate the durability of the treatment results with Cerecyte coils in comparison with that of bare platinum coils in terms of angiographic occlusion rates at follow-up. Methods Eighty aneurysms treated with Cerecyte coils were included in this study to carry out a matched-pair analysis. Every aneurysm treated with Cerecyte coils was matched with an aneurysm treated with bare platinum coils. Matching of the aneurysms was done according to the aneurysm size, location, neck size, initial occlusion grade, and clinical presentation. Results The initial treatment results were similar in both groups as part of a matching protocol. Subgroup analysis revealed a significant difference in the durability of occlusion in aneurysms that showed Raymond Class I obliteration on follow-up angiograms (69 [86.2%] in the Cerecyte group vs 51 [63.8%] in the control group, p = 0.002). Further thrombosis to Raymond Class I occlusions was higher in the Cerecyte group (17 [77.3%] of 22 vs 8 [36.4%] of 22 aneurysms). Conclusions Cerecyte coils provide further thrombosis and more durable results than bare platinum coils following coil embolization of cerebral aneurysms.


2019 ◽  
Vol 2 (2) ◽  
pp. 77
Author(s):  
Siti Halimatusya’diyyah Luthfiyani ◽  
Ari Widodo ◽  
Diana Rochintaniawati

This study aims to analyze the effect of STEM-based biology learning on technological literacy and students’ decision making skills in senior high school. The sample used in this study were X grade students from two classes in one of the senior high school in Bandung. Determination of the research subject was carried out as a convenience sampling technique from recommendation teachers and studying the activities of students who had not learned about environmental pollution material. This study used a quasi-experimental method through a non-equivalent control group design. Student’s technological literacy in this study was measured by using several aspects of technological literacy while student’s decision making was measured by using open-ended questions that are relevant to socio-scientific issues. Student’s decision making analyzed based on the basic categories of decision making and the level of argumentation as a reasoning process in decision making. This study shows that STEM-based biology learning does not affect technological literacy and decision making in high school students. This was done on statistical tests on technological literacy and decision making skills tests results that showed no significant difference between students in STEM classes with non-STEM classes.


2018 ◽  
Vol 17 (5) ◽  
pp. 563-584
Author(s):  
Katharina Meuer ◽  
Gunda Woessner

This study analyses the recidivism-reducing effect of electronic monitoring (EM) in the context of early work release and home detention as a means of release preparation. We tested the hypothesis that EM reduces recidivism after the termination of EM. The results are based on a randomized controlled trial in Baden-Württemberg, Germany, where a pilot project between 2010 and 2012 enabled different forms of EM. The participating prisoners were randomly assigned either to the experimental group under EM or to the control group, whose participants had to continue their regular sentence behind prison walls. Qualitative data and data of a matched-pair sample complement the analyses. There was no statistical significant difference between the recidivism rates of the EM and control group subjects.


2020 ◽  
Vol 48 (3) ◽  
pp. 673-681 ◽  
Author(s):  
David R. Maldonado ◽  
Sarah L. Chen ◽  
Rafael Walker-Santiago ◽  
Jacob Shapira ◽  
Philip J. Rosinsky ◽  
...  

Background: Hip arthroscopic surgery in patients with borderline dysplasia continues to be controversial. In addition, it has been suggested that ligamentum teres (LT) tears may lead to inferior short-term patient-reported outcomes (PROs) when compared with a match-controlled group. Purposes: (1) To report minimum 5-year PROs in patients with borderline dysplasia and LT tears who underwent hip arthroscopic surgery and (2) to compare these PROs to those of a matched-pair control group of patients with borderline dysplastic hips without LT tears. Study Design: Cohort study; Level of evidence, 3. Methods: Data were prospectively collected for patients who underwent hip arthroscopic surgery between September 2008 and August 2013. Patients were included if they had a preoperative diagnosis of borderline dysplasia (lateral center-edge angle [LCEA], 18°-25°) and had preoperative and minimum 5-year postoperative modified Harris Hip Score (mHHS), Nonarthritic Hip Score (NAHS), and visual analog scale (VAS) for pain scores. Exclusion criteria were osteoarthritis of Tönnis grade >1, previous hip conditions, any previous ipsilateral hip surgery, or workers’ compensation status. There were 2 borderline dysplastic groups created. An LT tear group was matched 1:1 to a control group (no LT tear) with similar age, sex, body mass index (BMI), and laterality via propensity score matching. Significance was set at P < .05. Results: A total of 24 patients with an LT tear (24 hips) were matched to 24 patients without an LT tear (24 hips). There was no significant difference in age, sex, BMI, or laterality between groups. The mean age was 36.2 ± 17.2 and 34.9 ± 15.9 years for the control and LT tear groups, respectively ( P = .783). There were 17 (70.8%) and 16 (66.7%) female patients in the control and LT tear groups, respectively, and the mean preoperative LCEA was 23.3° and 22.2° in the control and LT tear groups, respectively. No differences were observed between groups in baseline PROs, intraoperative findings, or surgical procedures. LT debridement was performed in 17 (70.8%) patients in the LT tear group compared with 0 (0.0%) in the control group. Also, 5-year postoperative PROs were comparable in both groups, with the control group exhibiting superior Veterans RAND 12-Item Health Survey (VR-12) mental ( P = .041) and Short Form–12 (SF-12) mental ( P = .042) scores. Finally, hips with an intact LT were significantly more likely ( P = .022) to achieve the patient acceptable symptomatic state (PASS) for the mHHS (100.0% and 75.0%, respectively). No significant differences were present between the groups for the minimal clinically important difference (MCID) of the mHHS ( P = .140), MCID of the Hip Outcome Score–Sport-Specific Subscale (HOS-SSS) ( P = .550), or PASS of the HOS-SSS ( P = .390). Conclusion: After hip arthroscopic surgery, patients with borderline dysplasia and LT tears demonstrated favorable PROs at a minimum 5-year follow-up. Outcomes were similar to a matched-pair control group without LT tears, with the group with intact LTs showing higher VR-12 mental and SF-12 mental scores. Furthermore, patients with borderline dysplasia and intact LTs were significantly more likely to achieve the PASS for the mHHS.


2021 ◽  
Author(s):  
Carlos Takahiro Chone ◽  
Guilherme M. de Carvalho ◽  
Maria Kruschewsky ◽  
Agricio N. Crespo ◽  
Elba C. Etchebehere ◽  
...  

Abstract Background: Oral cancer spreads preferentially through lymphatics with a high rate of micrometastases. We studied the rate of neck recurrence in patients with T1/T2 squamous cell carcinoma (SCC) of oral cavity with clinically negative necks (cN0) submitted to elective neck dissection (END) or sentinel lymph node biopsy (SLNB) with a histopathologically negative specimen of END (pN0) or sentinel nodes (SN). Methods: Prospective study matched paired with a retrospective control group. We studied forty-three patients: 25 in the SLNB group and 18 in the control group (END), and compared both patient cohorts, with negative lymph node metastases with more than five years of follow-up. We matched both groups by gender, age, site, stage, pathological status of the primary lesion, adjuvant treatment, length of follow-up by Odds ratio analysis with 95% confidence interval and t-test without significant difference all categories(p>0.05). Results: Both SLNB and END groups had a similar recurrence rate in the neck, without significant difference. Conclusions: Elective neck dissection may be unnecessary in this study population when SN comes out without metastases after extensive histopathological evaluation.


Author(s):  
Yasser Khalaf Rashid AlShujairi - Haidar Abdul Karim Mohsen

The objective of the research was to identify the impact of the strategy of the six hats in the achievement and decision-making in the teaching methods for the third year students in the faculties of education. The researchers followed the experimental method in their research, and the number of members of the research sample (70) (35) students studied the strategy of the six hats, the control group and the number of its members (35) students studied in the usual way, and then the researchers between the two groups statistically computed in the variables: In order to achieve the goal of the research, the researchers formulated a set of behavioral objectives for the scientific material that will be studied in the experiment. They then prepared experimental plans for the experimental group in accordance with the strategy of the six hats and according to the usual method of the control group, (50), and a decision-making scale consisting of (41) paragraphs with three alternatives. The net has shown There was a statistically significant difference at the mean level (0.05) among the average scores of the experimental group that studied the strategy of the six hats. It obtained an average of (41,78), compared to the control group studied in the normal manner; In the test of achievement, as well as in the decision-making scale, the experiment obtained an average of (78,30). The control group, which was studied in the usual way, obtained an average of 61,45. The difference in the achievement test and the decision- In the light of the results of the research, the researchers recommended, among other things, the adoption of the strategy of the six hats in the Dries to its impact on the collection and decision-making.


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