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Related Concept Videos

Drug Dosing: Obese Patients01:21

Drug Dosing: Obese Patients

In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
Assessment of the Cardiovascular System III: Palpation01:27

Assessment of the Cardiovascular System III: Palpation

Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...
Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

Pharmacokinetics in Obese Patients: Drug Absorption and Distribution

Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion01:20

Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion

Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
Parentral Nutrition: Centeral and Peripheral Parental Nutrition01:27

Parentral Nutrition: Centeral and Peripheral Parental Nutrition

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:
1. Central Parenteral Nutrition (CPN):
CPN involves delivering a high concentration of nutrients through a large vein. This is typically achieved using a Peripherally Inserted Central Catheter (PICC) or,...
Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...

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Related Experiment Video

Updated: Jun 18, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
09:36

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

Comparing peripheral venous access between obese and normal weight children.

Olubukola O Nafiu1, Constance Burke, Andy Cowan

  • 1Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109-0048, USA. onafiu@med.umich.edu

Paediatric Anaesthesia
|November 20, 2009
PubMed
Summary

Obese children experience more difficulty with intravenous access compared to lean children. This study found obese children were more likely to require multiple attempts for successful peripheral intravenous (PIV) cannulation.

Related Experiment Videos

Last Updated: Jun 18, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
09:36

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

Area of Science:

  • Pediatric Surgery
  • Anesthesiology
  • Medical Device Placement

Background:

  • Peripheral intravenous (PIV) access is crucial for pediatric surgical procedures.
  • Obesity is often anecdotally linked to challenges in achieving PIV access.
  • Limited data exists on the objective relationship between body mass index (BMI) and PIV success in children.

Purpose of the Study:

  • To investigate the association between body mass index (BMI) and the ease of peripheral intravenous (PIV) cannulation in pediatric patients undergoing noncardiac surgery.
  • To determine if higher BMI correlates with increased difficulty in PIV placement.

Main Methods:

  • Prospective data collection from 103 children (aged 2-18 years) undergoing elective noncardiac surgery.
  • Recording patient demographics (age, gender, ethnicity, weight, height, BMI), PIV insertion details (site, attempts, operators, cannula size).
  • Primary outcome: success of PIV placement on the first attempt, with a target sample size of 40 obese and 40 control patients.

Main Results:

  • 55.2% of patients achieved PIV cannulation on the first attempt; 39.6% required 2-3 attempts.
  • Obese children demonstrated a significantly higher likelihood of failed first attempts compared to lean controls (P < 0.001).
  • Obese children were also significantly more likely to require two or more attempts for successful cannulation (P < 0.001).

Conclusions:

  • Intravenous (IV) placement is demonstrably more challenging in obese children compared to their lean counterparts.
  • The volar surface of the hand may offer a more successful IV access site in obese children following failed attempts on the dorsum of the hand.
  • Understanding optimal IV access sites can enhance success rates, reduce patient distress, and improve procedural efficiency.