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- Author or Editor: Alberto Maria Crovace x
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To compare load-to-failure results for laparoscopic absorbable fixation straps (AFSs) deployed at various angles and for AFSs versus absorbable knotless (barbed) suture when used in simulated total laparoscopic gastropexy (TLG) in specimens from cadaveric dogs.
30 stomach and abdominal body wall specimens.
Specimens were assigned to 1 of 3 groups for use in simulated TLG constructs for comparisons of load-to-failure results for single AFSs deployed at 30°, 60°, or 90° (AFS-angle group; n = 10) or for a gastropexy span of 4 to 5 cm achieved with 3-0 absorbable knotless (barbed) monofilament suture applied in a simple continuous pattern (TLG-1; 10) versus 8 AFSs applied with a deployment angle > 30° (TLG-2; 10). A 1-way ANOVA was used to compare results among AFS deployment angles (30°, 60°, or 90°) and between TLG-1 and TLG-2.
Mean ± SD load to failure for the AFS-angle group was significantly higher for the AFS deployment angles of 60° (8.00 ± 3.90 N) and 90° (12.71 ± 8.00 N), compared with 30° (5.17 ± 1.90 N). However, no substantial difference was detected in the mean ± SD load to failure for TLG-1 (39.18 ± 7.1 N) versus TLG-2 (31.43 ± 10.86 N).
CONCLUSIONS AND CLINICAL RELEVANCE
Results of the present study supported the potential use of AFSs in gastropexy in dogs; however, prospective clinical research with adequate long-term follow-up is warranted before recommendations can be made.
OBJECTIVE To evaluate the impact of 2 tidal volumes (TVs) with or without positive end-expiratory pressure (PEEP) on lung mechanics, aeration, and gas exchange in healthy anesthetized dogs.
ANIMALS 40 mixed-breed dogs with healthy lungs.
PROCEDURES Anesthetized dogs were randomly assigned to 4 groups (n = 10/group) with different ventilatory settings: TV of 8 mL/kg and PEEP of 0 cm H2O (low TV group), TV of 8 mL/kg and PEEP of 5 cm H2O (low TV plus PEEP group), TV of 15 mL/kg and PEEP of 0 cm H2O (high TV group), or TV of 15 mL/kg and PEEP of 5 cm H2O (high TV plus PEEP group). Expired CO2 and respiratory rate were titrated on the basis of a predetermined stepwise protocol. Gas exchange, respiratory mechanics, and pulmonary aeration were evaluated by means of CT 30 minutes after starting mechanical ventilation at the assigned setting.
RESULTS Partial pressures of arterial and expired CO2 were higher in the low TV and low TV plus PEEP groups than in the high TV and high TV plus PEEP groups. Peak and plateau airway pressures were higher in the PEEP group than in the other groups. Static lung compliance was higher in the high TV plus PEEP group than in the low TV group. Relative percentages of atelectatic and poorly aerated lung were lower in the high TV plus PEEP group than in the other groups. Oxygenation was similar among groups.
CONCLUSIONS AND CLINICAL RELEVANCE Differences in TV and PEEP application during mechanical ventilation may affect respiratory function in anesthetized dogs with healthy lungs. Ventilation with a TV of 15 mL/kg and PEEP of 5 cm H2O significantly improved lung compliance and reduced the amount of atelectatic and poorly aerated lung.