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how is the rule of nines used in determining the extent of a burn injury

by Jan Kilback PhD Published 2 years ago Updated 2 years ago
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The rule of nines gives an idea of how much of your total body's surface area a burn takes up. This informs treatments based on the size and intensity of the burn injury. Emergency medical responders are some of the medical workers who use the rule of nines most.

The size of a burn can be quickly estimated by using the "rule of nines." This method divides the body's surface area into percentages. The front and back of the head and neck equal 9% of the body's surface area. The front and back of each arm and hand equal 9% of the body's surface area.

Full Answer

What is the rule of nines in burn assessment?

The Rule of Nines has been shown to be the most frequently recited algorithm by physicians and nurses for estimating burn surface area in numerous studies. The Rule of Nines estimation of body surface area burned is based on assigning percentages to different body areas.

What is the rule of nines in nursing?

The rule of nines assesses the percentage of burn and is used to help guide treatment decisions including fluid resuscitation and becomes part of the guidelines to determine transfer to a burn unit. You can estimate the body surface area on an adult that has been burned by using multiples of 9.

What is the Wallace rule of nines used for?

The Rule of Nines, also known as the Wallace Rule of Nines, is a tool used by trauma and emergency medicine providers to assess the total body surface area (TBSA) involved in burn patients. Measurement of the initial burn surface area is important in estimating fluid resuscitation requirements since …

What percentage of the body is involved in a burn?

An adult who has been burned, the percent of the body involved can be calculated as follows: As an example, if both legs (18% x 2 = 36%), the groin (1%) and the front chest and abdomen were burned, this would involve 55% of the body.

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What is the rule of nines?

The rule of nines is a method doctors and emergency medical providers use to easily calculate the treatment needs for a person who’s been burned. It’s sometimes referred to as the Wallace rule of nines after Dr. Alexander Wallace, the surgeon who first published the method. The creation of this method is credited to Pulaski and Tennison.

How is the rule of nine used?

This includes the amount of fluid replacement and degree of care a person needs. When a person experiences a second-degree burn or worse, the protective layer of skin is destroyed.

How many IVs do you need to use the rule of nines?

Another example of how a provider may use the rule of nines is to determine how much IV access is needed. If a person has 15 percent or more of their total body surface area burned, they’ll need at least one peripheral line to provide IV fluids. If a person’s body is burned 40 percent or more, they’ll need at least two IVs.

What percentage of the body surface area burns require IV fluids?

According to the National Institutes of Health, burns that are greater than 20 to 25 percent of total body surface area require significant intravenous (IV) fluids. Doctors will also use the estimated body surface area burned to determine how much fluid to administer.

What percentage of the body is burned?

For example, if they were burned on each hand and arm as well as the front trunk portion of the body, using the rule of nines, they’d estimate the burned area as 36 percent of a person’s body.

When should a burn center treat a wound?

Other circumstances where a burn center should treat the wounds include: when the person is a child. when the burned areas involve key areas of the body, such as the hands, feet, genitalia, face, or major joints. chemical burns. electrical burns. the presence of third-degree burns.

What percentage of burns are fatal?

The rule of nines can also relay to a medical team receiving the patient how serious the injury is. Providers also know that burns that exceed 30 percent of a person’s body can be potentially fatal, according to the National Institutes of Health.

How does the Rule of Nines work?

You can learn more about the Rule of Nines and other methods for calculating TBSA in our TBSA infographic. Here is quick rundown:

What is the rule of nines?

The Rule of Nines gives medical professionals a way to quickly calculate how much of the body has sustained burn injury. This standard also ensures a consistent measure of TBSA. The Rule of Nines should achieve the same result in New York as it does in Texas, California, or anywhere in between. If a patient is transferred from one medical facility ...

What percentage of TBSA is on the right leg?

Example: A person has burns covering the groin, the entire front of the right leg, the top half of the front of the left leg and the top of the back of the right leg. The TBSA is 1% for the groin, 9% for the front of the right leg, 4.5% for the front of the left leg, and 4.5% for the back of the right leg, for a total TBSA of 19%.

Why is the rule of nine important?

The Rule of Nines for burns is the way medical professionals calculate the TBSA (total body surface area) that has been burned. It is important to calculate the TBSA for two reasons: It is part of the burn center referral criteria to determine if the patient needs to be admitted to a burn unit. It is used to determine how much fluids ...

How many areas are there for burns on children?

Rule of Nines for burns on children: The entire surface of the body is divided into 7 areas, with these percentages: Note that for both adults and children, some areas are given a greater proportion than their actual surface area would warrant.

What is the rule of nines for children?

Torso: top half = 9%. Torso: bottom half = 9%. Back: top half = 9%. Back: bottom half = 9%. Adults and children have different body proportions, so the Rule of Nines is different for children. They have proportionally larger heads and shorter legs than adults.

What is the TBSA of a person with burns?

The TBSA is 4.5%. Example: A person has burns covering the top half of the back of the left arm and the top of the back. The TBSA is 2.25% for the burned portion of the arm and 9% for the burned portion of the back, for a total TBSA of 11.25%.

What is the rule of nines?

The most important thing to remember about the rule of nines is that it is intended to be used in the field to quickly determine if patients need to go to a specialty burn center. Once the patient is in a burn center, more advanced techniques will be used to determine the exact burned surface area.

How to apply the rule of nines?

To apply the rule of nines, add up all the areas of the body that are burned deep enough to cause blisters or worse ( 2 nd or 3rd-degree burns). For example, the entire left arm and the chest covered in blisters would be 18 percent. Partial areas are approximated. For example, the face is only the front half of the head ...

Why is it so hard to measure the size of a burn?

Measuring the size of a burn is difficult because every person is different in size, shape, and weight. It's impossible to simply choose what universal size of a burn is significant. A square foot of burned surface area is much worse to a person who weighs 130 pounds than it is to someone who weighs 200 pounds. Sara Lynn Paige/Getty Images.

How many sections are there in a burned body?

To approximate the percentage of burned surface area, the body has been divided into eleven sections:

What percentage of the body is covered by the genitals?

Right leg (below the knee) Left leg (below the knee) Each of these sections takes about nine percent of the body's skin to cover it. Added all together, these sections account for 99 percent. The genitals make up the last one percent of the total body surface area.

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What is the rule of nines?

Alterations to the Rule of Nines may be made based on body mass index (BMI) and age. The Rule of Nines has been shown to be the most frequently recited algorithm by physicians and nurses for estimating burn surface area in numerous studies.

What is the Wallace Rule of Nines?

The Rule of Nines, also known as the Wallace Rule of Nines, is a tool used by trauma and emergency medicine providers to assess the total body surface area (TBSA) involved in burn patients. Measurement of the initial burn surface area is important in estimating fluid resuscitation requirements since ….

How to measure burns?

Burns can be measured by estimating the body surface area on an adult that has been burned by using multiples of 9. When measuring burns in adults, the rule of nines assesses the percentage of burn and is used to help guide treatment decisions including fluid resuscitation and becomes part of the guidelines to determine transfer to a burn unit.

What percentage of the body would be burned if both legs were burned?

If both legs (18% x 2 = 36%), the groin (1%) and the front chest and abdomen were burned, this would involve 55% of the body.

Should physicians exercise their own clinical judgment when assessing the results of our tools or calculators?

Physicians and healthcare professionals should exercise their own clinical judgment when assessing the results of our tools or calculators.

What are the processes that are important for a burn?

Although managing the burn injury itself is important, the most critical processes, such as airway, breathing, circulation, disability, exposure, and fluid resuscitation, must be monitored and maintained.

What is the damage of a burn?

Burns can be dramatic, injurious conditions that cause significant amounts of pain, scarring, disfigurement, organ dysfunction, and psychological trauma. And the damage from burns, while most evident on the skin, extends well beyond that which is visible. When most of us think of a burn, we typically think of a thermal burn, ...

What is the deepest part of the injury and the core of the wound?

the zone of hyperemia. The zone of coagulation is the deepest part of the injury and the core of the wound. The zone of stasis features decreased tissue perfusion and vascular damage. The zone of hyperemia is the outer zone and is reddened but has minimal tissue damage. Now let's talk about burn depth.

What percentage of TBSA is a partial burn?

Partial-thickness burn of 30% of TBSA. Burns to specific areas, such as hands, genitalia, feet, and face, are considered major burns. A full-thickness burn of >10 % of TBSA and a partial-thickness burn >25% of TBSA places the injury in the major burn category.

What happens when you burn a wound?

Even in the healing of burn wounds, complication may arise. Contractures, in which the wound edges pull together, may develop, lessening mobility. Likewise, compartment syndrome—in which fluid gathers in an area of the body and circulation is compromised—may occur.

How does a burn affect the body?

Severe burns can affect many body organs and systems. For starters, in burn conditions, the body enters a hypermetabolic state. Hypovolemia must be guarded against with proper fluid replacement. Often, the lungs can be affected with pulmonary edema and inhalation injuries.

What to do when you have a burn?

Placing ice on the most severely burned areas. One of the first steps in burn management is making certain airway, breathing, and circulation are maintained. This situation is certainly an emergency, so 911 should be called.

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