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Related Concept Videos

Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

Hypertension III: Clinical Manifestations and Diagnostic Studies

Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
Hypertension V: Nursing Management01:23

Hypertension V: Nursing Management

The nursing management of hypertension involves accurately assessing symptoms, making a comprehensive nursing diagnosis, collaborating with patients to set goals, and implementing targeted interventions to mitigate the condition's impact and improve patient well-being.Comprehensive AssessmentThe initial step in nursing care for hypertension involves a thorough patient assessment. It includes evaluating symptoms such as headaches, dizziness, blurred vision, and previous hypertension episodes.
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.
Alterations in Blood Pressure01:30

Alterations in Blood Pressure

Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
Hypertension I: Introduction01:28

Hypertension I: Introduction

Hypertension is a widespread, long-term medical condition where blood pressure in the arteries remains elevated. It is characterized by systolic blood pressure readings of 130 mm Hg or above or diastolic blood pressure (DBP) readings of 80 mm Hg or higher. Unmanaged hypertension poses significant health risks, making the distinction between primary (or essential) hypertension and secondary hypertension crucial, as their management and implications vary.Primary HypertensionPrimary hypertension,...
Assessing Blood pressure using a doppler ultrasound01:19

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:

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A Metadata Extraction Approach for Clinical Case Reports to Enable Advanced Understanding of Biomedical Concepts
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Published on: September 20, 2018

Extracting Signs and Symptoms of Hypertensive Disorders in Pregnancy from Clinical Notes Using Natural Language

Jihye Kim Scroggins1, Zhihong Zhang2, Ismael I Hulchafo3

  • 1School of Nursing, University of North Carolina at Chapel Hill, 120 Medical Dr, Chapel Hill, NC, 27514, USA. jihyeks@unc.edu.

Maternal and Child Health Journal
|May 20, 2026
PubMed
Summary

Natural language processing (NLP) shows moderate accuracy in extracting hypertensive disorders in pregnancy signs and symptoms from electronic health records. Documentation varied by patient race and ethnicity.

Keywords:
Health disparitiesHypertensive disordersMaternal morbidityNatural language processingSymptom science

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Published on: September 26, 2018

Area of Science:

  • Medical Informatics
  • Clinical Natural Language Processing
  • Reproductive Health

Background:

  • Hypertensive disorders in pregnancy (HDP) affect 16% of US births.
  • Accurate identification of HDP signs and symptoms (SS) is crucial for patient care.
  • Electronic health records (EHRs) contain valuable clinical information.

Purpose of the Study:

  • To evaluate natural language processing (NLP) for extracting HDP signs and symptoms (SS) from clinical notes.
  • To assess the feasibility of large-scale SS extraction using NLP.

Main Methods:

  • Retrospective observational pilot study using EHR data (83,003 clinical notes from 17,775 patients).
  • Trained and tested five machine learning models and ClinicalBERT for SS extraction (elevated blood pressure, neurological, renal, hepatic/hematologic).
  • Examined HDP diagnoses by SS documentation and SS documentation by patient race and ethnicity.

Main Results:

  • XGBoost achieved the highest F1-score (0.75); elevated blood pressure (0.87) and neurological SS (0.77) had the highest scores.
  • 24.3% of notes and 42.3% of patients had at least one SS category documented.
  • Increased SS documentation correlated with higher HDP diagnoses (p < .001); non-Hispanic Black patients had higher SS documentation.

Conclusions:

  • NLP demonstrates moderate accuracy for extracting HDP SS, indicating feasibility for broader application.
  • Significant differences in SS documentation were observed across racial and ethnic groups.
  • Further research is needed to enhance NLP performance and expand annotated datasets.