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Related Concept Videos

Gravimetry: Overview01:05

Gravimetry: Overview

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Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
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Bulk Density of Aggregate01:22

Bulk Density of Aggregate

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Bulk density refers to the mass of aggregate particles that would fill a unit volume. The concept of bulk density originates from the inability to pack aggregate particles in a manner that completely eliminates void spaces. Hence, the term bulk refers to the volume that encompasses both the aggregates and the voids. This measurement is crucial when aggregates are batched by volume and is used to convert quantities by mass to volume.
Most natural mineral aggregates, like sand and gravel,...
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Specific Gravity of Aggregate01:19

Specific Gravity of Aggregate

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Aggregates typically contain pores, which can be either permeable or impermeable. Considering the pores in the aggregates, the specific gravity of aggregates is defined in three different forms, namely, bulk or gross specific gravity, apparent specific gravity, and absolute specific gravity.
Bulk or gross specific gravity is calculated by taking the ratio of the mass of aggregates in the saturated surface-dry state to the total volume that includes both the solids and the voids within the...
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Precipitation Gravimetry01:03

Precipitation Gravimetry

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Mass and Weight01:19

Mass and Weight

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Mass and weight are often used interchangeably in everyday conversation. For example,  medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the...
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Apparent Weight01:09

Apparent Weight

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True weight is the measure of the gravitational force acting on an object. However, if the object accelerates, its measured weight is different from its true weight. Similar observations can be made when the object is submerged in water. An object's weight in water is its apparent weight, which is equal to the difference between its true weight and the buoyant forces.
Consider a person standing on a bathroom scale inside an elevator. If the scale is accurate at rest, its reading equals the...
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Related Experiment Video

Updated: Apr 27, 2026

A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions
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How to determine 'dry weight'?

Ali I Gunal1

  • 1Department of Nephrology, Kayseri Education and Research Hospital , Kayseri, Turkey.

Kidney International Supplements
|July 17, 2014
PubMed
Summary

Achieving dry weight is a key strategy for dialysis patients to control hypertension and prevent cardiovascular issues. This involves reaching normal blood pressure without medication and a cardio-thoracic index under 48%.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Hypertension Management

Background:

  • Sodium and fluid retention are common in dialysis patients, leading to hypertension and cardiovascular complications.
  • Hypertension in dialysis patients contributes significantly to morbidity and mortality.
  • Maintaining normal blood pressure is crucial for managing cardiovascular risk in this population.

Purpose of the Study:

  • To highlight the importance of achieving and maintaining 'dry weight' as a strategy for blood pressure control in dialysis patients.
  • To define the key criteria for determining when 'dry weight' has been achieved.

Main Methods:

  • The study focuses on identifying clinical indicators for successful dry weight achievement.
  • Key parameters evaluated include blood pressure and cardio-thoracic index.
Keywords:
blood pressurecardiothoracic indexdry-weight

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Main Results:

  • Achieving dry weight is presented as an effective, yet often overlooked, strategy for managing hypertension in dialysis patients.
  • Normotension without antihypertensive medication, coupled with a cardio-thoracic index below 48%, are identified as primary indicators of achieved dry weight.

Conclusions:

  • Dry weight optimization is a critical, foundational approach to managing hypertension and reducing cardiovascular risk in dialysis patients.
  • Establishing clear criteria for dry weight ensures effective blood pressure control and improved patient outcomes.