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All Journal Indonesian Journal of Anesthesiology and Reanimation (IJAR) Jurnal Neuroanestesi Indonesia
Uhud, Akhyar Nur
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Biochemistry, Genetics & Molecular Biology Education Medicine & Pharmacology Neuroscience Public Health

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Pressure Reactivity Index (PRx): A Concept to Optimize Cerebral Perfusion Pressure in Traumatic Brain Injury Uhud, Akhyar Nur; Bisri, Dewi Yulianti; Jasa, Zafrullah Khany; Bisri, Tatang
Jurnal Neuroanestesi Indonesia Vol 14, No 2 (2025)
Publisher : https://snacc.org/wp-content/uploads/2019/fall/Intl-news3.html

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24244/jni.v14i2.693

Abstract

Two common factors contributing to poorer outcomes in TBI patients are high intracranial pressure (ICP) and low cerebral perfusion pressure (CPP). These two factors constitute a vicious circle that will have a negative impact on TBI patients. An increase in ICP will cause a decrease in CPP, while a reduction in CPP will cause ischemia, which will worsen the high ICP. However, increasing the CPP by increasing MAP will not help the situation; in fact, it may worsen the impact due to impairment of cerebral autoregulation (CA). Therefore, it is critical to manage TBI patients with an ideal CPP. Pressure reactivity index (PRx) is a measurement of the linear relationship between the mean arterial pressure (MAP) and ICP. A positive correlation between ICP and MAP indicates an impairment of CA, which suggests a suboptimal CPP value. The basis of PRx theory is that the rise, because of the presence of CA, an increase in MAP should not be followed by the rise in ICP because there is a compensatory effect in the form of a decrease in cerebral blood volume, so that ICP does not increase. That being said, this mechanism will not work when the limit of autoregulation is exceeded. Based on PRx and CPP, an optimal CPP could be obtained by using a U-shaped curve. The outcomes of TBI patients can be enhanced by treating them according to their optimal CPP (CPPopt).
Low-Dose Ketamine as Perioperative Analgesia in Caesarean Sections in Remote Areas with Limited Medical Supplies Avidar, Yoppie Prim; Salinding, Agustina; Hamzah; Uhud, Akhyar Nur; Maulydia
Indonesian Journal of Anesthesiology and Reanimation Vol. 4 No. 2 (2022): Indonesian Journal of Anesthesiology and Reanimation (IJAR)
Publisher : Faculty of Medicine-Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ijar.V4I22022.87-97

Abstract

Introduction: Cesarean section is the most common surgical procedure performed in the world and its postoperative pain is still a major issue in several countries. In a low-resource setting, this management poses a challenge for anesthesiologists. Ketamine is the most used anesthetic drug in the world due to its easy access and proven benefits. Objective: This research aims to analyze the effectiveness of low-dose ketamine as postoperative analgesia in cesarean sections conducted in areas with limited medical supplies. Methods: A Randomized Controlled Trial (RCT) was done from August 2020 to January 2021 with consenting pregnant patients who had undergone cesarean section. The sampled population was randomized to receive either ketamine intravenously or a placebo before the Subarachnoid Block (SAB). Low dose ketamine was divided into three groups 0.15 mg/kg, 0.25 mg/kg, and 0.5 mg/kg. The outcome was divided into primary outcome (pain score after 1-hour post-operation, 2 hours post-operation, 24 hours post-operation, and 48 hours post-operation) and secondary outcome (Apgar Score in the first minute and 5 minutes, hypotension after SAB, sedative effect during operation, postoperative nausea vomiting, time to receive opioid postoperative as rescue analgesia and total opioid uses). Results: This study screened 105 patients and recruited 90 patients that were randomized into two groups consisting of 45 patients that received either low-dose ketamine or a placebo. The groups administered ketamine showed a lower pain score in 1 hour (p-value = 0.0037) and 2 hours post-operation (p-value = 0.0037). They also showed that it could prolong the administration of fentanyl (p-value = 0.0003) and lower total fentanyl used (p-value = 0.0008). The groups administered ketamine showed that there was a sedation effect (p-value = 0.0001) that depended on the dosage used. Conclusion: Intravenous ketamine with low doses can reduce pain scores at 1 hour to 2 hours post-operation and shows the need to reduce opioid requirements.
Co-Authors Agustina Salinding Avidar, Yoppie Prim Dewi Yulianti Bisri Hamzah Jasa, Zafrullah Khany Maulydia Tatang Bisri