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Related Concept Videos

Local Anesthetics: Clinical Application as Epidural Anesthesia01:29

Local Anesthetics: Clinical Application as Epidural Anesthesia

Epidural anesthetics are administered in the fat-filled epidural space, the outermost part of the spinal canal. This technique is commonly employed for pain management and anesthesia during lower abdomen and pelvis surgeries or labor and delivery.
Since epidural anesthetics can be infused through an epidural catheter, all types of drugs, including short-acting ones, can be administered. Chloroprocaine and lidocaine are examples of short and long-duration anesthetics, respectively. Bupivacaine...
Local Anesthetics: Clinical Application as Spinal Anesthesia01:11

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Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...
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Aneurysm IV: Nursing Management

Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...

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Updated: Jun 3, 2026

Spinal Sonography for Ultrasound-Guided Lumbar Neuraxial Anesthesia
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Maternal haemodynamic changes during spinal anaesthesia for caesarean section.

Eldrid Langesæter1, Robert A Dyer

  • 1Division of Critical Care, Department of Anaesthesiology, Oslo University Hospital, Oslo, Norway. eldrid.langesaeter@oslo-universitetssykehus.no

Current Opinion in Anaesthesiology
|March 19, 2011
PubMed
Summary

Spinal anesthesia for cesarean delivery can cause hypotension. Phenylephrine is recommended to manage maternal hemodynamics, with heart rate serving as a reliable indicator of cardiac output. Further research is needed for high-risk pregnancies.

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Area of Science:

  • Anesthesiology
  • Cardiovascular Physiology
  • Obstetrics

Background:

  • Maternal hemodynamics during cesarean section under spinal anesthesia are crucial.
  • Traditional monitoring (blood pressure, heart rate) is insufficient; cardiac output assessment is increasingly important.
  • Understanding these changes is vital for managing healthy women and those with preeclampsia or cardiac disease.

Purpose of the Study:

  • To review maternal hemodynamic changes during spinal anesthesia for cesarean section.
  • To propose a physiological approach for preventing and treating hemodynamic instability.
  • To guide anesthetic management in healthy, preeclamptic, and cardiac disease patients.

Main Methods:

  • Review of recent publications on maternal hemodynamics during cesarean section.
  • Analysis of cardiac output monitoring data in various patient groups.
  • Physiological arguments for vasopressor selection and administration.

Main Results:

  • Spinal anesthesia typically decreases systemic vascular resistance, with partial compensation by stroke volume and heart rate.
  • Phenylephrine is the preferred vasopressor for healthy pregnant women.
  • Cardiac dysfunction in severe preeclampsia and tolerance of combined spinal-epidural anesthesia in cardiac disease patients are highlighted.

Conclusions:

  • Early phenylephrine administration (bolus or infusion) is recommended for most patients undergoing cesarean section with spinal anesthesia.
  • Heart rate response to vasopressors is a reliable surrogate for cardiac output.
  • Further research on high-risk pregnancies (early-onset preeclampsia, cardiac disease) is warranted.