# How is Schofield equation calculated?

## How is Schofield equation calculated?

The Schofield Equation is a method of estimating the basal metabolic rate (BMR) of adult men and women published in 1985….Men:

Age Equation (kcal/day) SEE
10–18 17.686 × W + 658.2 105
18–30 15.057 × W + 692.2 153
30–60 11.472 × W + 873.1 167
> 60 11.711 × W + 587.7 164

### How do you calculate indirect calorimetry?

Weir equation used to calculate energy expenditure: Energy expenditure = (3.9VO2 – 1.1VCO2) – 2.17 (urinary nitrogen) Abbreviated Weir Equation = used to calculate REE: REE = (3.94 x VO2) + (1.1 x VCO2)

#### What are examples of methods used in indirect calorimetry?

Indirect calorimetry systems estimate respiratory gas exchange as a surrogate for substrates consumed and produced during metabolism. This is done by one of 4 methods: confinement, closed-circuit, total collection, and open-circuit approaches.

How do you calculate VO2 energy expenditure?

VO2= (10.8 x watts) / M (wt. in kg) + (7)

1. To calculate the energy expenditure of a 62 kg woman cycling at a work rate of 450 kgm.min:
2. VO2= (1.8 x 450)/ 62 + 7.
3. VO2= 810/62 + 7.
4. VO2= 13 + 7.
5. VO2= 20 ml/kg/min.

What is Henry equation?

The Henry equation was used to estimate BMR and PAL levels were revised to better reflect current physical activity levels. The calculations were based on the energy required to maintain a BMI of 22.5kg/m2, reflecting the need to encourage a shift in the population towards a healthier weight.

## What’s my physical activity level?

A person’s Physical Activity Level (PAL) is that person’s total energy use over a 24 hour period divided by his basal metabolic rate.

### Who would use indirect calorimetry?

Indirect calorimetry has the advantage of mobility and low equipment cost and is frequently used in clinical settings to assess patients’ energy requirements. Indirect calorimetry also provides quantitative information about the types of substrates that are oxidized [19].

#### What are the limitations of indirect calorimetry?

Physical limitations of indirect calorimetry Lets say, there is a leak in the circuit 9eg. around the tube, or through a pneumothorax and out of the chest drain). This leak will steal some gas, and render the measurements of volume inaccurate.

Who uses indirect calorimetry?

Indirect calorimetry (IC) is considered the gold standard to measure caloric needs in critically ill patients at bedside, and its use has been strongly recommended by the recent European Society for Clinical Nutrition and Metabolism (ESPEN) and American Society for Parenteral and Enteral Nutrition (ASPEN) guidelines [1 …

What is the formula for VO2 max?

Physiologists and sports scientists have devised other formulas that use factors such as your age, resting heart rate and maximum heart rate to calculate your VO2 max. MHR = maximum heart rate (beats/minute) = number of heart beats in 20 seconds multiplied by 3.

## How do you find kcal min?

Multiply 2 L/min by 5 kcal/L. Your client is burning 10 kcal/min. To get total kcal burned during exercise, simply multiply 10 by the total number of minutes of exercise.

### How do you use the Henry equation?

The Henry equation is the recognised energy estimation calculator in accordance with the British Dietetic Association. To estimate your requirements, factor this simple calculation for your age: Male: Aged 18-30 >>>>> 16.0 x weight (kg) + 545 = ……..

#### How is the Weir formula used in calorimetry?

For fluid flow over a weir, see Weir § Flow_measurement. The Weir formula is a formula used in indirect calorimetry, relating metabolic rate to oxygen consumption and carbon dioxide production. According to one source, it says:

What are the discharge coefficients for ogee weirs?

Vertical-faced discharge coefficients for ogee crests ( USBR 1987 ). Note: values of C 0 is based on SI system units (m 0.5 /s). Higher discharge than the design discharge causes negative pressure over the spillway bottom. This is because the nappe tends to disconnect from the spillway bottom.

Is the weir equation the same for ogee and broad crested?

Broad Crested and Ogee work the same as with the ungated inline structures. With Hager’s Equation, all four weir crest shapes are available, including the zero-height weir. The same weir equation is used, but an adjusted weir coefficient is computed based on physical and hydraulic properties.

## How is the weir coefficient calculated in HEC-RAS?

Where P = Spillway approach height. This value must be entered to use the Rehbock equation. HEC-RAS will then compute the weir coefficient, C using equation (2). According to Ippen (1950), this equation holds up well for values of H/P up to 5. And it performs with fair approximation for H/P values up to 10.