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Related Concept Videos

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Flow Sheet

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Flowsheets are valuable tools in nursing documentation. They enable healthcare professionals to efficiently record and monitor various patient assessments and measurements in a consolidated format.
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Factors Affecting Drug Distribution: Organ Perfusion Rate01:15

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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.
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Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models00:57

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Physiological pharmacokinetic models, often called flow-limited or perfusion models, typically assume a swift drug distribution between tissue and venous blood, creating a rapid drug equilibrium. This premise is based on the idea that drug diffusion is extremely fast, and the cell membrane presents no barrier to drug permeation. In this scenario, where no drug binding occurs, the drug concentration in the tissue equals that of the venous blood leaving the tissue. This greatly simplifies the...
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Blood Flow01:29

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Blood is pumped by the heart into the aorta, the largest artery in the body, and then into increasingly smaller arteries, arterioles, and capillaries. The velocity of blood flow decreases with increased cross-sectional blood vessel area. As blood returns to the heart through venules and veins, its velocity increases. The movement of blood is encouraged by smooth muscle in the vessel walls, the movement of skeletal muscle surrounding the vessels, and one-way valves that prevent backflow.
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Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

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Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
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Factors Affecting Pulmonary Ventilation01:19

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Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
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Related Experiment Video

Updated: Aug 9, 2025

Author Spotlight: Unveiling Prognostic Indicators in Heart Failure - The Role of Phase Angle and Bioelectrical Impedance Analysis
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Patient Characteristics and Variables Influencing Acute Medical Flow.

C H Wood1, J Underwood2, C Davies3

  • 1School of Medicine, Cardiff University, UK, CF14 4YS.

Acute Medicine
|February 22, 2023
PubMed
Summary
This summary is machine-generated.

Weekday evenings and nights present challenges for acute medical patient flow, with longer waiting times and increased patient acuity observed during these periods. Targeted interventions, particularly workforce adjustments, are recommended to address these critical times.

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Cutoff Value of Phase Angle by Bioelectrical Impedance Analysis at Admission as a Prognostic Factor in Patients with Acute Heart Failure
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Area of Science:

  • Healthcare Management
  • Patient Flow Analysis
  • Clinical Operations

Background:

  • Waiting times are a key metric for assessing patient flow in healthcare.
  • Understanding 24-hour variations in patient referrals and waiting times is crucial for optimizing acute medical services.

Purpose of the Study:

  • To analyze the 24-hour variation in patient referrals and waiting times within an Acute Medical Service (AMS).
  • To identify peak times for referrals and waiting periods and their impact on patient care.

Main Methods:

  • Retrospective cohort study conducted at the largest hospital in Wales.
  • Data collected included patient demographics, referral and waiting times, and adherence to Clinical Quality Indicators (CQIs).

Main Results:

  • Peak referral times were observed between 11:00 and 19:00.
  • Peak waiting times occurred between 17:00 and 01:00, being longer on weekdays than weekends.
  • Patients referred between 17:00 and 21:00 experienced the longest waits, with over 40% failing CQIs.

Conclusions:

  • Weekday evenings and nights pose significant challenges to acute medical patient flow.
  • Higher mean and median age and NEWS scores were noted between 17:00 and 09:00.
  • Workforce interventions should be strategically targeted to address identified problematic periods.