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Related Concept Videos

Reaction Rate02:53

Reaction Rate

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The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
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Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa01:22

Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa

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The pH of urine, the drug's pKa, and the urine flow rate are vital parameters for drug reabsorption and excretion. Urinary pH varies between 4.6 and 8.0 and is influenced by diet, drug intake, and the patient's pathophysiology. It affects a drug's ionization state and reabsorption. For instance, carbohydrate-rich food produces alkaline urine promoting drug excretion, while proteins and certain medications like ascorbic acid lead to acidic urine enhancing reabsorption.
The pKa of a...
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Drug Accumulation During Multiple Dosing: Intermittent IV Infusions01:24

Drug Accumulation During Multiple Dosing: Intermittent IV Infusions

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Intermittent intravenous (IV) infusion is a method of drug administration where medications are delivered over short infusion periods followed by intervals of no drug delivery. This approach helps to prevent sustained high drug concentrations in the bloodstream, reducing the risk of adverse effects associated with prolonged exposure. Unlike continuous infusion, steady-state concentrations may not be achieved during a single dosing cycle but can be reached through repeated...
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Factors Affecting Drug Distribution: Organ Perfusion Rate01:15

Factors Affecting Drug Distribution: Organ Perfusion Rate

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Drug distribution within the body is a complex process influenced by several factors, including perfusion rate, the rate at which the bloodstream transports drugs to tissue. This limitation becomes particularly significant when dealing with highly lipophilic drugs. In such cases, the rate at which the drug can move across membranes is crucial, and if the membrane is highly permeable to the drug, distribution becomes rate-limited by perfusion.
Perfusion rate-limited distribution relies on the...
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Parenteral Drug Delivery Systems: Injectables, Implants, and Infusion Devices01:28

Parenteral Drug Delivery Systems: Injectables, Implants, and Infusion Devices

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Parenteral drug delivery systems play a crucial role in modern therapeutics by enabling the direct administration of drugs into the systemic circulation, bypassing the gastrointestinal tract. These systems are particularly valuable for poorly absorbed oral medications that are unstable in the digestive environment or require rapid onset or sustained therapeutic levels. Delivery is achieved through intravenous, intramuscular, or subcutaneous routes, each selected based on the drug's properties...
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Calculating the Equilibrium Constant02:46

Calculating the Equilibrium Constant

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The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression.
For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation:
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Updated: Feb 15, 2026

Microinjectrode System for Combined Drug Infusion and Electrophysiology
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Microinjectrode System for Combined Drug Infusion and Electrophysiology

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Calculating drug infusion rates.

John England1

  • 1Private and NHS Hospitals, UK.

Journal of Perioperative Practice
|January 13, 2018
PubMed
Summary
This summary is machine-generated.

Accurate intravenous drug dosage calculation is crucial for patients under general anesthesia. Correct dosing ensures therapeutic benefits and prevents toxic effects from overdosing.

Keywords:
CalculationsDrugsInfusions

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Area of Science:

  • Anesthesiology
  • Pharmacology

Background:

  • Intravenous drug administration is standard for patients undergoing general anesthesia.
  • Precise dosage calculations are vital for achieving desired therapeutic outcomes.
  • Incorrect dosing can lead to adverse toxic effects.

Purpose of the Study:

  • To emphasize the critical importance of accurate drug dosage calculations in general anesthesia.
  • To highlight the risks associated with incorrect intravenous medication dosing.

Main Methods:

  • This study focuses on the principles of intravenous drug administration and dosage calculation in anesthesiology.
  • Review of established protocols for medication management during general anesthesia.

Main Results:

  • Accurate dosage calculation directly correlates with patient safety and treatment efficacy.
  • Overdosing can result in severe toxic side effects, negating therapeutic benefits.

Conclusions:

  • Correct calculation of intravenous drug dosages is a cornerstone of safe and effective general anesthesia.
  • Adherence to precise dosing guidelines is essential to maximize therapeutic effects and minimize patient harm.