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Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
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Bioavailability studies are essential for understanding how a drug is absorbed, distributed, metabolized, and excreted in the body. These studies assess the extent and rate at which the active pharmaceutical agent becomes available at the site of action. The design of bioavailability studies can involve single-dose or multiple-dose regimens, each with distinct advantages and limitations.Single-dose studies are the preferred approach due to their simplicity and reduced drug exposure for...
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Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
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Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...

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Implementation of sonopartogram: multicenter feasibility study.

N M W Lee1, S L Lau1, Y K Yeung1

  • 1Department of Obstetrics and Gynecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR.

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology
|March 8, 2024
PubMed
Summary
This summary is machine-generated.

Ultrasound assessments of labor progress, including fetal position and cervical dilation, were feasible and reduced pain compared to vaginal examinations. This method may replace some traditional labor assessments.

Keywords:
AOPHPDSCDangle of progressioncaput succedaneumcervical dilatationfeasibilityfetal head stationhead–perineum distanceparasagittal angle of progressionsonographic cervical dilationtransperineal ultrasound

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Area of Science:

  • Obstetrics and Gynecology
  • Medical Imaging
  • Labor and Delivery Management

Background:

  • Routine labor progress assessment relies on abdominal palpation and vaginal examination (VE).
  • Vaginal examination is subjective, poorly reproducible, and can be painful for women.
  • There is a need for more objective and comfortable methods to monitor labor progress.

Purpose of the Study:

  • To evaluate the feasibility of integrating transabdominal and transperineal ultrasound for monitoring labor progress.
  • To assess fetal position, parasagittal angle of progression (psAOP), head-perineum distance (HPD), and sonographic cervical dilatation (SCD) using ultrasound.
  • To determine if ultrasound can reduce pain during labor examinations.

Main Methods:

  • 100 women undergoing induction of labor (IOL) were recruited.
  • Combined transabdominal and transperineal ultrasound scans were performed to assess various fetal and cervical parameters.
  • Intrapartum scans replaced VE unless clinically indicated; pain scores were recorded.

Main Results:

  • 223 intrapartum ultrasound scans were performed in 87 participants.
  • Median pain score for ultrasound scans was 0, compared to 3 for VE.
  • Cesarean delivery was associated with a slower rate of change in psAOP, HPD, and SCD.

Conclusions:

  • Comprehensive ultrasound assessment is feasible for monitoring labor progress.
  • Ultrasound significantly reduces pain compared to vaginal examinations.
  • Ultrasound may potentially replace some traditional transabdominal and vaginal examinations during labor.