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Related Concept Videos

Pulse01:16

Pulse

2.1K
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
2.1K
Pulse01:05

Pulse

3.8K
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
3.8K
Uncertainty in Measurement: Accuracy and Precision03:37

Uncertainty in Measurement: Accuracy and Precision

101.2K
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
101.2K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.8K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.8K
Pulse Oximetry01:24

Pulse Oximetry

1.4K
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
1.4K
Regulation of Pulse01:20

Regulation of Pulse

2.3K
Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
2.3K

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Related Experiment Video

Updated: Feb 3, 2026

A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome
04:53

A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome

Published on: May 15, 2010

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[Precision pulse capsulotomy : The new capsulorhexis?]

M D Becker1, S Michels2, S Lortz2

  • 1Augenklinik Stadtspital Triemli, Birmensdorferstr. 497, 8063, Zürich, Schweiz. Matthias.Becker@triemli.zuerich.ch.

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|October 28, 2018
PubMed
Summary
This summary is machine-generated.

The Zepto procedure (precision pulse capsulotomy) offers standardized capsulorhexis for cataract surgery, potentially improving upon manual techniques. Further research is needed to compare its strength and capsule shrinkage to the manual method.

Keywords:
Capsule shrinkageCataract surgeryNitinolRhexisStandardization

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Area of Science:

  • Ophthalmology
  • Surgical Technology

Background:

  • Manual capsulorhexis, while standard for cataract surgery, faces limitations in accuracy regarding opening size and placement.
  • Femtosecond laser technology offers an alternative, but the Zepto procedure (precision pulse capsulotomy, PPC) presents another potential advancement.

Purpose of the Study:

  • To evaluate the Zepto procedure (PPC) as a standardized method for creating anterior capsulorhexis.
  • To compare the strength and capsule shrinkage of PPC to the conventional manual capsulorhexis technique.

Main Methods:

  • The Zepto procedure utilizes a flexible suction adapter with a nitinol ring to create a 5.25 mm capsulorhexis.
  • Comparison of PPC with manual capsulorhexis regarding biomechanical strength and post-operative capsule shrinkage.

Main Results:

  • The Zepto procedure creates a standardized 5.25 mm capsulorhexis.
  • The comparative strength and capsule shrinkage of PPC versus manual capsulorhexis remain under investigation.

Conclusions:

  • The Zepto procedure (PPC) offers a standardized approach to capsulorhexis in cataract surgery.
  • Further studies are required to definitively establish the superiority of PPC over manual techniques in terms of strength and capsule stability.