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Related Concept Videos

Power01:08

Power

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The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...
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Sums of Power01:22

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In definite integration, Riemann sums approximate the area under a curve by dividing it into subintervals and summing the areas of rectangles. When these approximations follow predictable numerical patterns, such as arithmetic or polynomial sequences, sum formulas offer a more efficient and accurate way to compute the result. In particular, the sum of consecutive integers, squares, and cubes plays an essential role in simplifying these calculations, especially when dealing with uniform...
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Instantaneous Power01:22

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Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
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Complex Power01:14

Complex Power

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Power engineers have introduced the concept of complex power to determine the cumulative effect of parallel loads. This idea plays a crucial role in power analysis because it encompasses all the details related to the power consumed by a specific load.
Complex power is defined as the multiplication of the voltage and the complex conjugate of the current. The magnitude of this power, known as apparent power, is measured in volt-amperes (VA). Notably, the angle of the complex power equates to the...
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Electrical Power01:07

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Electric power is the product of current and voltage, represented in units of joules per second, or watts. For example, cars often have one or more auxiliary power outlets with which you can charge a cell phone or other electronic devices. These outlets may be rated at 20 amps and 12 volts, so that the circuit can deliver a maximum power of 240 watts. Consider a 25 Watt bulb and a 60 Watt bulb. The conversion of electrical energy produces heat and light, while the kinetic energy lost by the...
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Nuclear Power02:36

Nuclear Power

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Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
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Related Experiment Video

Updated: Feb 10, 2026

Isolating Malignant and Non-Malignant B Cells from lck:eGFP Zebrafish
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Non-malignant Sequelae after Unconfined Power Morcellation.

Hao M Zhang1, Lee A Christianson1, Claire L Templeman2

  • 1Department of Obstetrics, Gynecology and Reproductive Services, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California (Drs. Zhang and Christianson).

Journal of Minimally Invasive Gynecology
|May 22, 2018
PubMed
Summary

Unconfined uterine power morcellation led to repeat surgery in 5.41% of women. Endometriosis was a new diagnosis in 20.4% of these cases, suggesting a link to morcellation.

Keywords:
Abnormal uterine bleedingEndometriosisLaparoscopyParasitic leiomyoma

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Area of Science:

  • Gynecologic Surgery
  • Minimally Invasive Procedures
  • Surgical Morcellation Outcomes

Background:

  • Unconfined uterine power morcellation is used in laparoscopic supracervical hysterectomy.
  • Potential complications and long-term outcomes require thorough investigation.

Purpose of the Study:

  • To determine the incidence of repeat surgery following unconfined uterine power morcellation.
  • To identify subsequent findings and pathologies in patients requiring reoperation.

Main Methods:

  • Retrospective descriptive study of 5154 women undergoing laparoscopic supracervical hysterectomy with unconfined power morcellation.
  • Analysis of reoperation rates, indications, and pathological findings.

Main Results:

  • 5.41% (279/5154) of patients required reoperation within 24 months.
  • Common indications for reoperation included adnexal masses (31.2%) and pelvic pain (29.7%).
  • Endometriosis was newly diagnosed in 23.3% (65/279) of reoperative cases, suggesting a potential link to morcellation.

Conclusions:

  • Unconfined uterine power morcellation is associated with a significant rate of subsequent reoperation.
  • The high incidence of newly diagnosed endometriosis post-morcellation warrants further investigation into its potential causal relationship.