
Quiz Question
In Trefny 2025 et al., on plate length and stiffness, what plate–bone ratio was required before significant stiffness and strain differences became apparent?
🔍 Key Findings
- 12-hole LCPs (80% plate–bone ratio) showed significantly higher construct stiffness than 6-, 8-, or 10-hole plates in both compression and tension bending.
- Strain on the plate was significantly lower in 12-hole vs 6-hole plates at all regions of interest (ROIs), especially around the fracture gap.
- No incremental increases in stiffness or decreases in strain were observed between 6-, 8-, and 10-hole plates—only when comparing to 12-hole plates.
- Bone model strain adjacent to the plate end was significantly lower for 10- and 12-hole plates vs 6-hole plates under both loading conditions.
- The threshold effect suggests biomechanical benefits only emerge beyond a plate–bone ratio of ~80%.
- Working length increased from 9.4 mm (6-hole) to 13 mm (others), potentially influencing strain/stiffness differences.
- Four-point bending was used, as it replicates the most biomechanically relevant force on plated long bones.
- Clinical implication: Longer plates may reduce plate strain and peri-implant bone strain, potentially lowering risk of fatigue failure or stress risers.
Veterinary and Comparative Orthopaedics and Traumatology
2
2025
Effect of Plate Length on Construct Stiffness and Strain in a Synthetic Short-Fragment Fracture Gap Model Stabilized with a 3.5-mm Locking Compression Plate
2025-2-VCOT-trefny-5
In Buote 2023 et al., on laparoscopic gastrectomy in cats, which staple type was ultimately used for live feline surgeries?
🔍 Key Findings
- LVSG was feasible in 9/10 feline cadavers with successful stapled gastrectomy and minimal technical complications.
- Stenosis at the incisura angularis occurred in 2/10 cadavers, associated with staple placement too close to the lesser curvature.
- Leak testing was negative in 8 cadavers and both live cats, indicating effective staple sealing.
- Mean stomach resection was ~28%, though less than human standards (~75–80%) for metabolic effects.
- Surgery was performed safely in two live feline subjects, with no intraoperative or postoperative complications over a 6-month follow-up.
- Technique refinements included orogastric tube placement and custom 3D-printed cannulas to improve staple line accuracy and avoid stenosis.
- Tri-Staple purple cartridges provided graduated compression suited for feline gastric tissue thickness (~2.5 mm).
- No need for staple line oversew in live cats; staple-only closure proved safe in this short-term study.
Veterinary Surgery
6
2023
Laparoscopic vertical sleeve gastrectomy in felines: A cadaveric feasibility study and experimental case series in two cats
2023-6-buote2-4
In Lu 2025 et al., on SOP constructs, what mechanical outcome was observed across **all test constructs**, regardless of tee presence?
🔍 Key Findings
- Bending tees significantly increased mediolateral bending stiffness, but not craniocaudal stiffness, in plate-bone constructs.
- Mean mediolateral stiffness was 43.2 N/mm with tees vs. 41.1 N/mm without (p = 0.0042), though the absolute difference was small.
- No significant differences were found in craniocaudal bending stiffness between constructs with or without tees (p = 0.89).
- Plastic deformation occurred in all constructs; no screw pull-out or implant breakage was observed.
- SOP nodes may resist compressive but not tensile deformation, suggesting variable mechanical contributions depending on loading direction.
- Craniocaudal bending had greater stiffness than mediolateral due to higher area moment of inertia along the node diameter.
- Clinical relevance of added stiffness from tees remains unclear, warranting further in vivo and cyclic testing.
- This was the first study to directly test SOP constructs with/without tees over a fracture gap in multiple planes.
Veterinary and Comparative Orthopaedics and Traumatology
2
2025
Comparison of Bending Stiffness between String of Pearls Plate-Bone Substitute Constructs with and without Bending Tees in a Fracture Gap Model
2025-2-VCOT-lu-3
In Welsh 2025 et al., on orthogonal plating, what was the failure load for the OP2.0 construct?
🔍 Key Findings
- Compared unilateral plating (UP) vs orthogonal plating (OP) with 2.0, 2.4, and 3.0 mm plates (OP2.0, OP2.4, OP3.0).
- Model: acetal homopolymer (Delrin) rod with 29 mm fixed fracture gap, loaded axially (4–196 N, 90,000 cycles).
- OP constructs had 2.5–4.1x higher strength and 3.0–4.2x higher stiffness than UP constructs (p < .0002).
- UP had 3.5–4.1x higher gap strain than OP groups (p < .0075).
- All OP groups exceeded 1000 N max load before failure (vs 424 N for UP).
- Greater implant size in OP groups further increased performance.
- All constructs survived fatigue loading; 3.5 mm plates showed deformation, especially UP; OP plates remained intact.
Veterinary Surgery
4
2025
Biomechanical analysis of orthogonal and unilateral locking plate constructs in a fracture gap model
2025-4-VS-welsh-3
In David 2024 et al., on single-port cryptorchidectomy, why was a 6 mmHg capnoperitoneum preferred?
🔍 Key Findings
- Single-port laparoscopic-assisted cryptorchidectomy (SP-LAC) was feasible in 13/14 dogs with abdominal cryptorchidism.
- Median surgical time was 17 min for unilateral and 27 min for bilateral cryptorchidectomy.
- All testes were successfully exteriorized through a 15-mm mini-celiotomy in most dogs; only 2 needed slight enlargement.
- One major complication occurred (testicular artery hemorrhage, requiring conversion to open surgery).
- Two minor complications involved trocar-related issues (splenic capsule laceration, capnoretroperitoneum).
- No incisional complications were reported postoperatively; some dogs had mild dermatitis at the clipped site.
- The technique requires only one surgeon and no advanced tools beyond a single-port endoscope.
- Low-pressure capnoperitoneum (6 mmHg) was adequate for visualization in most cases.
Veterinary Surgery
3
2024
Single-port laparoscopic-assisted abdominal cryptorchidectomy in 14 dogs
2024-3-VS-david-5
In Gutbrod 2024 et al., on feline tibial stabilization, what intramedullary pin diameter was associated with the highest biomechanical performance?
🔍 Key Findings
- 2.4 mm LCP with a 1.6 mm IM pin had the highest axial stiffness and yield strength among the tested constructs.
- Axial stiffness was significantly higher in the 2.4 mm LCP + 1.6 mm IM pin group compared to 2.7 mm LCP alone (p = .013).
- No significant difference in torsional stiffness was found among groups.
- 2.4 mm LCP + 1.0 mm pin had the lowest stiffness and failure load, underperforming both other constructs.
- All constructs failed via valgus bending, consistent with clinical observations in feline tibial fractures.
- A 1.6 mm pin (~50% canal fill) resulted in superior construct performance vs. 1.0 mm (~30% fill).
- Group 2 (2.4 LCP + 1.6 mm pin) outperformed the 2.7 mm LCP alone in stiffness, despite using a smaller plate.
- Plate–rod constructs may better preserve periosteal blood supply and support minimally invasive stabilization strategies.
Veterinary Surgery
4
2024
Ex vivo biomechanical evaluation of 2.4 mm LCP plate rod constructs versus 2.7 mm LCP applied to the feline tibia
2024-4-VS-gutbrod-3
In Miller 2024 et al., on SOP-LC mechanical testing, which configuration improved initial torsional stiffness?
🔍 Key Findings Summary
- No significant difference in mechanical properties between contoured vs non-contoured SOP-LC rods
- Clamp configuration significantly influenced mechanical performance:
- Single-side clamps → ↑ yield load, ↑ displacement, ↑ bending strength (p < 0.05)
- Alternating-side clamps → ↑ initial torsional stiffness (p = 0.029)
- Clamp slippage was evident only in torsional tests; screw loosening may be torque-dependent
- Mild screw bending and construct offset suggest subtle instability
- Recommends clamp configuration choice based on loading scenario
- Suggests 3.0 Nm torque may be more effective than 2.5 Nm to prevent clamp slippage
Veterinary and Comparative Orthopedics and Traumatology
4
2024
Mechanical Testing of Sliding on Pivot-Locking Clamp (SOP-LC) Fracture Repair System in Four-Point Bending and Torsion
2024-4-VCOT-miller-3
In Folk 2025 et al., on vessel sealing device reuse, how many devices failed intraoperatively due to malfunction?
🔍 Key Findings
40 dogs underwent splenectomy using 16 bipolar vessel sealing devices (VSDs)
Devices were reused up to 4 times after handwashing and ethylene oxide (EtO) sterilization
Biologic debris was found in 100% of devices, specifically under the transection blade, even after a single use
- Mostly scant (14/16) or mild (2/16) debris
No devices or debris yielded positive aerobic culture after EtO sterilization
EtO sterilization proved microbiologically effective despite visible residue
Perioperative failure rate: 1 device (malfunctioned during first activation)
Veterinary Surgery
3
2025
Incidence of residual biologic debris and contamination of reused bipolar vessel sealing devices after ethylene oxide sterilization following splenectomy
2025-3-VS-folk-5
In Trefny 2025 et al., on plate length and stiffness, what was the measured effect of plate length on plate strain?
🔍 Key Findings
- 12-hole LCPs (80% plate–bone ratio) showed significantly higher construct stiffness than 6-, 8-, or 10-hole plates in both compression and tension bending.
- Strain on the plate was significantly lower in 12-hole vs 6-hole plates at all regions of interest (ROIs), especially around the fracture gap.
- No incremental increases in stiffness or decreases in strain were observed between 6-, 8-, and 10-hole plates—only when comparing to 12-hole plates.
- Bone model strain adjacent to the plate end was significantly lower for 10- and 12-hole plates vs 6-hole plates under both loading conditions.
- The threshold effect suggests biomechanical benefits only emerge beyond a plate–bone ratio of ~80%.
- Working length increased from 9.4 mm (6-hole) to 13 mm (others), potentially influencing strain/stiffness differences.
- Four-point bending was used, as it replicates the most biomechanically relevant force on plated long bones.
- Clinical implication: Longer plates may reduce plate strain and peri-implant bone strain, potentially lowering risk of fatigue failure or stress risers.
Veterinary and Comparative Orthopaedics and Traumatology
2
2025
Effect of Plate Length on Construct Stiffness and Strain in a Synthetic Short-Fragment Fracture Gap Model Stabilized with a 3.5-mm Locking Compression Plate
2025-2-VCOT-trefny-2
In Raleigh 2022 et al., on pericardiectomy complications, which strategy is recommended to minimize VF risk when using electrosurgery?
🔍 Key Findings
- Ventricular fibrillation (VF) occurred in 3% of pericardiectomy cases across reporting institutions.
- 14 of 16 dogs (88%) that developed intraoperative VF died, indicating high mortality.
- Electrosurgical devices were used in 15/16 dogs; VF onset coincided with their use in 8 dogs, suggesting a potential but unproven association.
- Preoperative arrhythmias were seen in 7 dogs (e.g., VPCs, VT, bradycardia), possibly serving as early warning signs.
- Thoracoscopic approach was used in 75% of cases; however, conversion to open surgery was required in 9/13 thoracoscopic procedures after VF onset.
- Defibrillation was attempted in 13 dogs, but only 3 converted to sinus rhythm, and only 2 survived postoperatively.
- VF may result from stray current or cardiac manipulation; bipolar energy devices were implicated despite lower theoretical risk.
- Preventative strategies include judicious electrosurgery use, close ECG monitoring, rapid CPR preparedness, and preop cardiac risk assessment.
Veterinary Surgery
4
2022
The development of ventricular fibrillation as a complication of pericardiectomy in 16 dogs
2022-4-VS-raleigh-5
Quiz Results
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Key Findings
