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Related Concept Videos

Shunt Admittances01:26

Shunt Admittances

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Shunt admittances play a crucial role in the analysis of transmission lines, particularly for three-phase systems with neutral conductors. When a uniformly charged conductor is positioned above the Earth, it induces an equal but opposite charge on its surface. This interaction creates electric field lines between the conductor and the Earth.
To model this effect, the method of images is employed. This method involves replacing the Earth with an image conductor that mirrors the original...
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The Roles of Bacteria and Fungi in Plant Nutrition02:11

The Roles of Bacteria and Fungi in Plant Nutrition

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Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
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Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

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Intravenous anesthetics are drugs administered parenterally to induce anesthesia or sedation. Propofol is a widely used agent formulated as a 1% emulsion in soybean oil, glycerol, and egg phosphatide. It induces rapid anesthesia primarily due to its rapid distribution from the bloodstream to target tissues and is metabolized in the liver. However, it can cause significant pain on injection and hypertriglyceridemia. Fospropofol, a water-based prodrug of propofol, lacks these adverse effects.
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Routes of Drug Administration: Parenteral01:25

Routes of Drug Administration: Parenteral

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The administration of drugs via parenteral routes allows for direct drug introduction into the systemic circulation, resulting in high bioavailability because the medication bypasses the harsh conditions of the gastrointestinal tract and hepatic metabolism.
The intravenous route (IV) of drug administration can be further categorized into two types. The bolus injection administers the entire dose rapidly, while an intravenous infusion slowly delivers smaller doses steadily.
The IV route is often...
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Drug Delivery: Parenteral Route01:29

Drug Delivery: Parenteral Route

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The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
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Parentral Nutrition: Centeral and Peripheral Parental Nutrition01:27

Parentral Nutrition: Centeral and Peripheral Parental Nutrition

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Parenteral Nutrition (PN) delivers essential nutrients directly into the bloodstream, bypassing the digestive system. It is commonly used for individuals with severe digestive disorders or conditions that prevent normal nutrient absorption.
PN can be administered through two primary routes:
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Related Experiment Video

Updated: Feb 9, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
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Home parenteral nutrition using shunts.

J H Havill, R D Blair

    JPEN. Journal of Parenteral and Enteral Nutrition
    |May 1, 1984
    PubMed
    Summary

    Arteriovenous loop vein grafts offer a superior alternative for long-term home parenteral nutrition access compared to traditional shunts. This method proved successful in most patients, overcoming limitations of other techniques.

    Area of Science:

    • Vascular Surgery
    • Gastroenterology
    • Nutritional Support

    Background:

    • Home parenteral nutrition (HPN) requires reliable vascular access.
    • Traditional shunts are often unworkable for long-term HPN.
    • Alternative access methods are needed to improve patient outcomes.

    Observation:

    • Arteriovenous (AV) loop vein grafts were utilized for HPN access.
    • One AV loop vein graft insertion was unsuccessful.
    • Four AV loop vein grafts were successfully established and utilized.

    Findings:

    • AV loop vein grafts provide a workable and successful means of access for HPN.
    • This technique demonstrates superiority over indwelling catheters for long-term HPN.
    • Successful graft establishment is crucial for effective HPN delivery.

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    Implications:

    • AV loop vein grafts represent a promising solution for long-term HPN access.
    • Improved access methods can enhance the quality of life for HPN patients.
    • Further research into AV graft patency and management is warranted.