scholarly journals Rotational Stability of Proximally Unlocked Retrograde Femoral Nail In Damage Control Surgery – Biomechanical Study

2021 ◽  
Author(s):  
Rahil Muzaffar ◽  
Muadh Hamood Nasser Al Zeedi ◽  
Khurshid Alam ◽  
Ahmed Yaseen ◽  
Sultan Al Maskari
Keyword(s):  
Damage Control ◽  
Damage Control Surgery ◽  
Femoral Shaft ◽  
Torsion Test ◽  
Maximum Load ◽  
Biomechanical Study ◽  
Rotational Stability ◽  
Lateral Compression ◽  
Compression Screw ◽  
Rotational Displacement

Abstract BACKGROUND: This biomechanical study was performed to look into the rotational stability of retrograde femoral intramedullary nail when it is used without proximal locking as a damage control device for management of femoral shaft fractures in emergency situations. This study compares this technique with the accepted methods for femoral shaft fixations in damage control surgeries. An alternative technique of using lateral compression screw to provide additional rotational stability is described.METHODS: Experiments were divided into four different sets. Distally locked retrograde nail was passed across the fracture without any proximal fixation in set 1, a compression screw passed from lateral cortex in set 2, a proximal locking screw fixation in set 3. In set 4, Saw bone was fixed with external fixator.The lateral compression screw group was further sub divided into three subgroups based on the amount of torque applied manually.The torsion test was applied to create an rotational displacement of 10 degrees and the maximum load required to create the rotational displacement was noted.RESULTS: Application of a compression screw improved the rotational stability significantly in comparison to no proximal locking. In the subgroup III of lateral compression screw application, the rotational stability was found to be equivalent to stability achieved with Nail with proximal locking and was found to be greater in comparison to external fixator application.CONCLUSION: This study shows that the addition of a lateral compression screw significantly improves rotational stability and has the potential to be used in emergency lifesaving procedures.

The effect of tibial tuberosity advancement and meniscal release on kinematics of the cranial cruciate ligament-deficient stifle during early, middle, and late stance

2011 ◽  
Vol 24 (05) ◽  
pp. 342-349 ◽  
Author(s):  
J. A. Syrcle ◽  
R. M. McLaughlin ◽  
S. H. Elder ◽  
J. R. Butler
Keyword(s):  
Cruciate Ligament ◽  
Axial Rotation ◽  
Biomechanical Study ◽  
Tibial Tuberosity ◽  
Rotational Stability ◽  
Tibial Rotation ◽  
Cranial Cruciate Ligament ◽  
Rotational Displacement ◽  
Treatment Conditions

SummaryObjectives: To evaluate the effect of tibial tuberosity advancement (TTA) and meniscal release on cranial-caudal and axial rotational displacement during early, middle and late stance phases in the canine cranial cruciate ligament- (CCL) deficient stifle.Study design: In vitro biomechanical study.Methods: Eighteen pelvic limbs were evaluated for the effects of TTA on cranial-caudal displacement and axial rotation under a load equivalent to 30% bodyweight, and under the following treatment conditions: normal (intact CCL), CCL deficient, TTA-treated (CCL deficient + TTA), and meniscal release (TTA treated + meniscal release). The limbs were evaluated in the early, middle, and late stance phases using electromagnetic tracking sensors to determine cranial tibial displacement and tibial rotation relative to the femur.Results: Transection of the CCL resulted in significant cranial tibial displacement during early, middle, and late stance (p < 0.0001) and significant internal rotation during early (p = 0.049) and middle stance (p = 0.0006). Performance of TTA successfully eliminated cranial tibial displacement in early, middle, and late stance (p <0.0001) however, the TTA was unsuccessful in normalizing axial rotation in middle stance (p = 0.030). Meniscal release had no effect on cranial-caudal or rotational displacement when performed in conjunction with the TTA.Clinical significance: Tibial tuberosity advancement effectively eliminates cranial tibial displacement during early, middle and late stance however, TTA failed to provide rotational stability in mid-stance.

scholarly journals Minimally Invasive Internal Fixation of Femoral Shaft Fractures—A Biomechanical Study with a Disruptive Technique

Life ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1254
Author(s):  
Frank Layher ◽  
Georg Matziolis ◽  
Leos N. Kayhan ◽  
Matthias Bungartz ◽  
Olaf Brinkmann
Keyword(s):  
Internal Fixation ◽  
Plate Osteosynthesis ◽  
Damage Control ◽  
Femoral Shaft ◽  
Biomechanical Properties ◽  
Biomechanical Study ◽  
Deformation Analysis ◽  
Control Approach ◽  
Femur Fractures ◽  
Rod System

(1) Background: In polytrauma patients, femur fractures are usually stabilised by external fixation for damage control, later being treated with definitive plate or nail osteosynthesis. Screw/rod systems established in spinal surgery might be inserted for internal fixation, providing sufficient fracture stability that subsequent intervention is unnecessary. This was to be investigated biomechanically. (2) Methods: The unilaterally applied spinal internal fixator (IF) was subjected to load and deformation analysis on artificial femurs with 32-A3 fracture according to AO classification. Distance of screws to fracture and rod to cortical bone were analysed as parameters influenced surgically as stiffness and deformation of the treated fracture. In addition, the stability of another construct with a second screw/rod system was determined. The axial load in stance phase during walking was simulated. The results were compared against an established fixed-angle plate osteosynthesis (IP). (3) Results: There were no implant failures in the form of fractures, avulsions or deformations. All unilateral IF combinations were inferior to IP in terms of stability and stiffness. The bilateral construct with two screw/rod systems achieved biomechanical properties comparable to IP. 4) Conclusion: Biomechanically, a biplanar screw/rod system is suitable for definitive fracture stabilisation of the femur, despite a damage control approach.

Chronic mesenteric ischaemia presenting as possible large bowl malignancy: an easily overlooked differential diagnosis

2021 ◽  
Vol 14 (3) ◽  
pp. e240202
Author(s):  
Benjamin McDonald
Keyword(s):  
Computed Tomography ◽  
Emergency Department ◽  
Weight Loss ◽  
Differential Diagnosis ◽  
Damage Control ◽  
Damage Control Surgery ◽  
Mesenteric Ischaemia ◽  
Abdominal Symptoms ◽  
Chronic Mesenteric Ischaemia ◽  
Descending Colon

An 80-year-old woman presented to a regional emergency department with postprandial pain, weight loss and diarrhoea for 2 months and a Computed Tomography (CT) report suggestive of descending colon malignancy. Subsequent investigations revealed the patient to have chronic mesenteric ischaemia (CMI) with associated bowel changes. She developed an acute-on-chronic ischaemia that required emergency transfer, damage control surgery and revascularisation. While the patient survived, this case highlights the importance of considering CMI in elderly patients with vague abdominal symptoms and early intervention to avoid potentially catastrophic outcomes.

Damage control surgery

2021 ◽  
Vol 21 (S1) ◽  
pp. 147-154
Author(s):  
C. Güsgen ◽  
A. Willms ◽  
R. Schwab
Keyword(s):  
Damage Control ◽  
Damage Control Surgery

scholarly journals Evidence for use of damage control surgery and damage control interventions in civilian trauma patients: a systematic review

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Derek J. Roberts ◽  
◽  
Niklas Bobrovitz ◽  
David A. Zygun ◽  
Andrew W. Kirkpatrick ◽  
...  
Keyword(s):  
Systematic Review ◽  
Damage Control ◽  
Penetrating Trauma ◽  
Damage Control Surgery ◽  
Trauma Patients ◽  
Clinical Scenario ◽  
Cross Sectional ◽  
Iliac Vessel ◽  
Civilian Trauma ◽  
Definitive Surgery

Abstract Background Although damage control (DC) surgery is widely assumed to reduce mortality in critically injured patients, survivors often suffer substantial morbidity, suggesting that it should only be used when indicated. The purpose of this systematic review was to determine which indications for DC have evidence that they are reliable and/or valid (and therefore in which clinical situations evidence supports use of DC or that DC improves outcomes). Methods We searched 11 databases (1950–April 1, 2019) for studies that enrolled exclusively civilian trauma patients and reported data on the reliability (consistency of surgical decisions in a given clinical scenario) or content (surgeons would perform DC in that clinical scenario or the indication predicted use of DC in practice), construct (were associated with poor outcomes), or criterion (were associated with improved outcomes when DC was conducted instead of definitive surgery) validity for suggested indications for DC surgery or DC interventions. Results Among 34,979 citations identified, we included 36 cohort studies and three cross-sectional surveys in the systematic review. Of the 59 unique indications for DC identified, 10 had evidence of content validity [e.g., a major abdominal vascular injury or a packed red blood cell (PRBC) volume exceeding the critical administration threshold], nine had evidence of construct validity (e.g., unstable patients with combined abdominal vascular and pancreas gunshot injuries or an iliac vessel injury and intraoperative acidosis), and six had evidence of criterion validity (e.g., penetrating trauma patients requiring > 10 U PRBCs with an abdominal vascular and multiple abdominal visceral injuries or intraoperative hypothermia, acidosis, or coagulopathy). No studies evaluated the reliability of indications. Conclusions Few indications for DC surgery or DC interventions have evidence supporting that they are reliable and/or valid. DC should be used with respect for the uncertainty regarding its effectiveness, and only in circumstances where definitive surgery cannot be entertained.

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