What question did this study set out to answer?

To evaluate the effects of bolus and continuous intravenous pentobarbital sodium administration on short-term cardiovascular fluctuations and baroreceptor reflex sensitivity in rats.

February 1, 1996AJP Heart and Circulatory Physiology

Auto- and cross-spectral analysis of cardiovascular fluctuations during pentobarbital anesthesia in the rat

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Why the study?

Does intravenous pentobarbital affect short-term cardiovascular fluctuations in adult male Sprague-Dawley rats?

Population

Adult, male Sprague-Dawley rats

Design

Preclinical

Follow-up

120 min

Authors

CYCheryl C.H. YangNational Yang Ming Chiao Tung University TKT. B. J. KuoNational Yang Ming Chiao Tung University SCSamuel H.H. ChanPrincess Alexandra Hospital

Discussion

Member takes

Implication

May guide anesthesia protocols in rodent cardiovascular models; leaves open translation to other species or clinical settings.

Key Points

To evaluate the effects of bolus and continuous intravenous pentobarbital sodium administration on short-term cardiovascular fluctuations and baroreceptor reflex sensitivity in rats.
Administered intravenous pentobarbital as boluses (5, 10, or 20 mg/kg) or continuous infusions (10, 20, or 40 mg·kg⁻¹·h⁻¹) to adult male Sprague-Dawley rats.
Conducted auto- and cross-spectral analyses of systemic arterial pressure (SAP) and heart rate (HR) signals over frequency ranges from 0 to 2.4 Hz.
Assessed autonomic responsiveness during a 120-minute infusion (20 mg·kg⁻¹·h⁻¹) using autonomic blockade with phentolamine, propranolol, or atropine.
Pentobarbital induced mild hypotension and tachycardia alongside dose-dependent depression of very low (0–0.25 Hz) and low (0.25–0.8 Hz) frequency components of SAP and HR, as well as high-frequency (0.8–2.4 Hz) HR fluctuations.
Cross-spectral analysis demonstrated maintained high-frequency coherence alongside dose-related decreases in transfer function magnitude and baroreceptor reflex sensitivity.
Continuous infusion at 20 mg·kg⁻¹·h⁻¹ achieved stable plasma drug concentrations and hemodynamic parameters for 120 minutes while retaining distinct spectral responses to autonomic blockade.

Structured PICO

Does intravenous pentobarbital affect short-term cardiovascular fluctuations in adult male Sprague-Dawley rats?

Population

Adult, male Sprague-Dawley rats

Intervention

Intravenous administration of pentobarbital, delivered as a bolus injection (5, 10, or 20 mg/kg) or continuous infusion (10, 20, or 40 mg/kg/h)

Outcome

Short-term cardiovascular fluctuations (systemic arterial pressure and heart rate signals) quantified by auto- and cross-spectral analysissurrogate

Continuous intravenous pentobarbital at 20 mg/kg/h provides stable anesthesia in rats while preserving autonomic cardiovascular regulation.

Cite This Study

Yang et al. (1996) studied this question.

synapsesocial.com/papers/6a88eb8a19d633501c130e1e https://doi.org/10.1152/ajpheart.1996.270.2.h575

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Auto- and cross-spectral analysis of cardiovascular fluctuations during pentobarbital anesthesia in the rat

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Auto- and cross-spectral analysis of cardiovascular fluctuations during pentobarbital anesthesia in the rat

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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