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Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Assessment of blood pressure in brachial artery(two-step method)01:23

Assessment of blood pressure in brachial artery(two-step method)

Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
Pre-Procedural Guidelines for Assessing Blood Pressure01:10

Pre-Procedural Guidelines for Assessing Blood Pressure

Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the patient.
Measurement of Blood Pressure01:17

Measurement of Blood Pressure

Assessing blood pressure is a standard procedure executed in virtually all medical environments. The method utilized today was established over a hundred years ago by an innovative Russian doctor, Dr. Nikolai Korotkoff. The soft ticking noise, known as Korotkoff sounds, heard while taking blood pressure readings results from turbulent blood flow within the vessels. The apparatus required for this procedure includes a sphygmomanometer, a blood pressure cuff attached to a gauge, and a stethoscope.

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Related Experiment Video

Updated: Jun 27, 2026

Laser Doppler: A Tool for Measuring Pancreatic Islet Microvascular Vasomotion In Vivo
10:39

Laser Doppler: A Tool for Measuring Pancreatic Islet Microvascular Vasomotion In Vivo

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Non-invasive Assessment of Pancreatic Duct Hypertension Using Computational Flow Modeling.

Haobo Zhao1, Jung-Hee Seo1, Venkata Akshintala2

  • 1Mechanical Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD, 21218, USA.

Annals of Biomedical Engineering
|February 20, 2026
PubMed
Summary

This study developed a non-invasive method using MRCP and computational modeling to estimate pancreatic duct pressure (PDP). This approach shows promise for diagnosing pancreatic ductal hypertension (PDH) and guiding treatment in chronic pancreatitis patients.

Keywords:
Chronic pancreatitisComputational biomechanicsComputational fluid dynamicsMRCPPancreatic ductPhysiological flow

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Area of Science:

  • Medical Imaging
  • Computational Fluid Dynamics
  • Gastroenterology

Background:

  • Chronic pancreatitis (CP) diagnosis and management are challenging.
  • Pancreatic ductal hypertension (PDH) is implicated in CP pain.
  • Accurate, non-invasive methods for assessing PDH are needed.

Purpose of the Study:

  • To develop and validate a non-invasive method for estimating pancreatic duct pressure (PDP).
  • To integrate magnetic resonance cholangiopancreatography (MRCP) with computational flow modeling.
  • To assess the clinical relevance of this method for identifying PDH in CP.

Main Methods:

  • 3D pancreatic duct geometries were reconstructed from MRCP.
  • Computational fluid dynamics (CFD) simulations were performed.
  • A quasi-one-dimensional (1D) analytical model was derived for rapid PDP prediction.
  • Validation was done using prospective ERCP manometry and retrospective CP cohort data.

Main Results:

  • Simulated pressure distributions correlated with ERCP-measured pressure drops.
  • Greater simulated pressure drops were associated with improved pain relief in CP patients.
  • The quasi-1D model closely matched CFD results and improved with a non-linear inertial term.

Conclusions:

  • MRCP-based computational modeling offers a non-invasive method for PDP estimation.
  • The method shows agreement with invasive measurements and clinical relevance for symptom relief.
  • The validated quasi-1D model enables rapid, scalable assessment of PDH to guide treatment.