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Araos et al: Effect of continuous positive airway pressure helmet on respiratory function following laparoscopic surgery in healthy dogs
Veterinary Surgery 5, 2024

🔍 Key Findings

  • CPAP at 5 cmH₂O via helmet significantly improved PaO₂/FiO₂ ratio in the early postoperative period of brachycephalic dogs, supporting enhanced pulmonary oxygen exchange (p = .04).
  • CPAP had no significant effect on SpO₂ (p = .9), PaCO₂ (p = .18), or rectal temperature (p = .5).
  • Helmet tolerance decreased over time, with 13 dogs withdrawn for intolerance (9 CPAP, 4 control) and 6 dogs withdrawn for airway compromise (5 control, 1 CPAP).
  • CPAP group maintained PaO₂/FiO₂ ratios near or above 400 mmHg, while control dogs showed consistently lower values.
  • Authors suggest PaO₂/FiO₂ is a more reliable oxygenation measure than SpO₂ for evaluating postoperative lung function.
  • The study found no cases of hyperthermia; temperatures normalized over time in both groups.
  • Arterial catheterization failed in several dogs, limiting blood gas analysis to a subset of the population.
  • Authors recommend further studies focused on BOAS patients and exploring longer-duration CPAP use to assess impact on critical outcomes like tracheostomy rates or hospitalization.

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← Articles

Araos et al: Effect of continuous positive airway pressure helmet on respiratory function following laparoscopic surgery in healthy dogs
Veterinary Surgery 5, 2024

🔍 Key Findings

  • CPAP at 5 cmH₂O via helmet significantly improved PaO₂/FiO₂ ratio in the early postoperative period of brachycephalic dogs, supporting enhanced pulmonary oxygen exchange (p = .04).
  • CPAP had no significant effect on SpO₂ (p = .9), PaCO₂ (p = .18), or rectal temperature (p = .5).
  • Helmet tolerance decreased over time, with 13 dogs withdrawn for intolerance (9 CPAP, 4 control) and 6 dogs withdrawn for airway compromise (5 control, 1 CPAP).
  • CPAP group maintained PaO₂/FiO₂ ratios near or above 400 mmHg, while control dogs showed consistently lower values.
  • Authors suggest PaO₂/FiO₂ is a more reliable oxygenation measure than SpO₂ for evaluating postoperative lung function.
  • The study found no cases of hyperthermia; temperatures normalized over time in both groups.
  • Arterial catheterization failed in several dogs, limiting blood gas analysis to a subset of the population.
  • Authors recommend further studies focused on BOAS patients and exploring longer-duration CPAP use to assess impact on critical outcomes like tracheostomy rates or hospitalization.

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Multiple Choice Questions on this study

In Araos 2024 et al., on helmet CPAP in brachycephalic postoperative dogs, what future direction did the authors recommend regarding helmet CPAP use?

A. Use in orthopedic patients
B. Assessment during anesthesia
C. Focus on dogs with BOAS
D. Comparison to tracheostomy
E. Testing at lower FiO₂

Answer: Focus on dogs with BOAS

Explanation: Authors recommended further studies specifically in dogs with brachycephalic obstructive airway syndrome (BOAS).
In Araos 2024 et al., on helmet CPAP in brachycephalic postoperative dogs, what was the helmet CPAP treatment protocol in terms of pressure and duration?

A. 5 cmH₂O for 6 hours
B. 3 cmH₂O for 1 hour
C. 5 cmH₂O for 1 hour
D. 10 cmH₂O for 30 minutes
E. 2.5 cmH₂O for 2 hours

Answer: 5 cmH₂O for 1 hour

Explanation: CPAP was delivered at 5 cmH₂O for 1 hour using a veterinary-specific helmet.
In Araos 2024 et al., on helmet CPAP in brachycephalic postoperative dogs, which finding was true regarding SpO₂ following helmet CPAP use?

A. SpO₂ increased significantly
B. SpO₂ decreased over time
C. SpO₂ improved only in control group
D. SpO₂ showed no significant change
E. SpO₂ dropped below 90% in CPAP group

Answer: SpO₂ showed no significant change

Explanation: The study found no effect of CPAP on SpO₂ values (p = .9).
In Araos 2024 et al., on helmet CPAP in brachycephalic postoperative dogs, how many dogs were withdrawn due to poor helmet tolerance?

A. 6
B. 9
C. 11
D. 13
E. 17

Answer: 13

Explanation: 13 dogs were withdrawn due to poor tolerance, with more from the CPAP group.
In Araos 2024 et al., on helmet CPAP in brachycephalic postoperative dogs, which primary outcome showed a significant treatment effect?

A. SpO₂
B. Heart rate
C. PaCO₂
D. PaO₂/FiO₂ ratio
E. Rectal temperature

Answer: PaO₂/FiO₂ ratio

Explanation: CPAP significantly improved the PaO₂/FiO₂ ratio, indicating better oxygenation.

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