What is SIRS (Systemic Inflammatory Response Syndrome)? Is it like a big fire inside the body? Let's talk!

Have you ever heard of a condition called SIRS (Systemic Inflammatory Response Syndrome)? This name may be new to you. But it's a very dangerous condition that can occur inside our bodies. It's like the body overreacting to a small problem and starting a big fire. Shall we talk about this in detail?

What is SIRS (Systemic Inflammatory Response Syndrome)?

Simply put, SIRS is when our body overreacts to a stressor. Think of it like a country's defense system. When a small enemy comes, it has to fight it in the right way. But in SIRS, it's as if this army starts a big war over a small thing. This causes severe inflammation throughout the body. This inflammation can damage our vital organs, cause them to stop working, and sometimes even be life-threatening. That's why it's dangerous. When we talk about stressors, what are they?

• Infections : Infections caused by bacteria , viruses , fungi, etc. Sometimes, even a minor wound infection can cause a fever, but if it gets worse, it can lead to SIRS.
• Surgery: Even after major surgery, the body can sometimes react like this.
• Acute inflammation : When there is a sudden, severe inflammation somewhere in the body, for example, pancreatitis .
• Ischemia: This is when blood flow to a part of the body or an organ is reduced. Then the cells in those areas begin to die, and the body can respond to this as well.
• Cancer: SIRS can also occur in some cancer conditions.

Things like these are the main causes of SIRS.

Are SIRS and Sepsis the same thing?

Yes, although there is a slight connection between the two, sepsis is a slightly different condition than SIRS. Listen carefully. If the cause of SIRS is an infection , that is what we call sepsis . Do you understand? That is, almost everyone with sepsis has SIRS. Because the symptoms of SIRS occur when the body responds to an infection. However, not everyone with SIRS has sepsis. Because SIRS can be caused not only by infections, but also by other causes such as surgery, cancer, and ischemia, as mentioned earlier. Sepsis is also a very life-threatening condition that requires emergency medical treatment.That's why it's very important to be aware of both.

How common is SIRS?

It's hard for researchers to say exactly how common this is, because not everyone with SIRS makes it to the hospital on time. But SIRS is a relatively common condition in emergency room departments and intensive care units (ICUs) . In one study, they looked at nearly 27,000 hospitalized patients. Of those, 15% had at least two of the symptoms that would be considered SIRS when they were admitted to the hospital. And 47% met the criteria for SIRS at least once during their hospital stay. So you can imagine how serious this can be.

What are the symptoms of SIRS? How do you recognize them?

Because SIRS has many causes and affects many different parts of the body, the symptoms can vary greatly. But if you have one or more of these symptoms, don't ignore them. It's wise to seek medical advice immediately. Here are some of the symptoms:

• Redness and swelling (edema) in the affected areas of the body: similar to swelling around a wound, or it can be worse.
• Severe pain: Unbearable pain in the affected area.
• Loss of function in body parts: For example, not being able to move an arm or leg.
• Intense fatigue: You may feel so tired and sleepy that you can't do anything.
• Increased heart rate (Tachycardia): The heart beats faster than normal. It can exceed 90 beats per minute.
• Breathing abnormalities: Difficulty breathing, increased breathing rate (more than 20 times per minute).
• Fever or Hypothermia : The body can become overheated and develop a fever, or, conversely, the body temperature can drop below 36 degrees Celsius (96.8 Fahrenheit).
• Shivering or chills: You start shivering like you have a fever.
• Skin feels hot or clammy with sweat: Sometimes the skin may feel hot or clammy with sweat.
• Skin rash: Various types of rashes, such as eczema, can appear on the skin.
• Confusion, agitation, or other mental changes: Symptoms such as confusion, agitation, and slurred speech.
• Loss of consciousness: This is a very dangerous sign.

The most important thing:If you have these symptoms, please do not stay home. Go to the nearest hospital as soon as possible, or call 1990 for an ambulance. SIRS is a medical emergency.

What are the causes of SIRS?

SIRS occurs, as mentioned earlier, when our immune system overreacts to a stressor. Normally, our body uses inflammation to help us. Think about it, when we get a wound, it swells and turns red because cells come to fight it and start healing the wound. But in SIRS, this response becomes unnecessarily severe , and this inflammation itself causes us great harm. Here are some of the main reasons that can affect the condition of SIRS:

• Acute aspiration of food or liquids: If food or liquids are swallowed while eating or drinking, and these objects enter the lungs, this can also cause SIRS.
• Acute end-organ ischemia: When the blood supply to a vital organ, such as the brain, heart, or kidneys, suddenly stops or is severely reduced.
• Acute pancreatitis: This is also a serious condition.
• Adverse reaction to a medication: The body can react badly to some medications.
• Bacterial infections: Severe bacterial infections like pneumonia and meningitis.
• Blood cancers (hematologic malignancy): Conditions such as leukemia, lymphoma, and multiple myeloma.
• Burns: SIRS can also occur due to major burns.
• Erythema multiforme: This is a severe skin reaction.
• Lack of blood flow to your intestines and gastrointestinal perforation.
• Nonmedical substance use and overdose.
• Vasculitis: This is an inflammatory condition that occurs in the blood vessels.
• Toxic shock syndrome: This is also a life-threatening condition caused by a bacterial infection.
• Trauma and surgery-related trauma.
• Viral flu-like conditions: Sometimes even a normal flu can turn into SIRS if it becomes severe.
• Widespread fungal infections in people who have weak immune systems.

Now you probably understand that SIRS can occur for many reasons.

Who is at higher risk of developing SIRS?

Some people are more likely to develop SIRS than others. Let's find out who they are.

• Age: Young children and people over the age of 65 are at higher risk because both of these people's immune systems may be slightly weaker.
• Having a weakened immune system: People who are undergoing cancer treatment, those with HIV, and those who have had organ transplants have weakened immune systems, making them more likely to develop SIRS.
• Chronic conditions: People with long-term conditions such as diabetes, cirrhosis (hardening of the liver), and COPD (chronic obstructive pulmonary disease) are also at increased risk.
• Existing infection: If you already have an infection, such as pneumonia, meningitis, or cellulitis (a skin infection), it is more likely to become severe and progress to SIRS.

So if you or someone you know has these risk factors, it's very important to be especially aware of the symptoms of SIRS.

How do doctors diagnose SIRS?

Because SIRS is a potentially life-threatening condition, doctors try to diagnose it as early as possible. They use the following to do so:

• Physical exam: Your body is examined, especially vital signs such as fever, heart rate, breathing rate, and blood pressure.
• Your symptoms: We ask you carefully about the discomfort you are feeling.
• Your medical history: You will be asked about things like previous illnesses and medications you take.
• Possible cause of SIRS: If the cause of SIRS can be found, it will also help in the diagnosis.

Usually, a doctor with these symptoms will suspect SIRS and start treatment immediately. However, in addition, they may also perform several other tests to further evaluate your health and determine the exact cause of SIRS. For example:

• Blood tests: These can check many things. For example, basic metabolic panel, complete blood count (CBC) (this checks the number of white blood cells), lactic acid test, liver function tests, kidney function tests, etc.
• Blood oxygen level.
• Urinalysis.
• Bacterial culture test: To find out if there is an infection and, if so, what bacteria it is caused by.
• Imaging tests:Things like X-rays or CT scans can show what's going on inside the body.

SIRS criteria

To be diagnosed with SIRS, you must have at least two of the following symptoms:

• Body temperature: An increase of more than 38 degrees Celsius (100.4 Fahrenheit) or a decrease of more than 36 degrees Celsius (96.8 Fahrenheit).
• Heart rate: Increased to more than 90 beats per minute.
• Respiratory rate: An increase in the number of breaths per minute of more than 20, or a decrease in the partial pressure of CO2 in the blood of less than 32 mmHg.
• Leukocyte (white blood cell) count: Increase of more than 12,000.

But for children, these criteria are a little different. To be diagnosed with SIRS, they must have an abnormal white blood cell count and an abnormal body temperature. This is because children's heart rate and respiratory rate are usually slightly higher than adults'.

How is SIRS treated?

There are two main things to consider when treating SIRS. One is to treat the underlying cause of SIRS. The other is to prevent multi-organ dysfunction syndrome (MODS). Treatment options may vary depending on the cause of SIRS. However, here are some of the most common treatments:

• Giving fluids through a vein (IV fluids): This helps to ensure good blood flow to the body's organs and prevent blood pressure from dropping too low.
• Antibiotics: If SIRS is caused by a bacterial infection, these medications are given.
• Vasopressor medications: If your blood pressure is too low, these are given to bring it back to normal.
• Corticosteroids: These are used to prevent the body from going into shock or to help it recover from it.
• Insulin through a vein (IV insulin): Control blood sugar levels (if necessary).
• Surgery: For example, exploratory surgery to remove pus from a festering wound, remove damaged tissue, or find out what's wrong internally.

Imagine, if you have kidney failure, you may need dialysis (blood purification). Similarly, if you have respiratory failure, you may need to be connected to a mechanical ventilator.

Is it possible to recover from SIRS? What is the outlook?

The prognosis of SIRS depends on several factors.

• How quickly you were diagnosed and treated.
• What is the root cause of SIRS?
• Whether you have risk factors for developing SIRS (e.g., a weak immune system).

The good news is that if treated quickly, most people with SIRS recover completely and can return to normal lives. However, this is a serious condition that can sometimes be fatal. The mortality rate from SIRS is about 7%. The mortality rate from sepsis in particular is as follows:

• For sepsis: 1.3%
• For severe sepsis: 9.2%
• For septic shock (a condition caused by sepsis): 28%

Therefore, it is extremely important to seek medical advice as soon as symptoms of SIRS appear, as there is a risk of death.

What are the possible complications of SIRS?

SIRS (especially if caused by an infection) can progress to severe sepsis or septic shock. It can also lead to multi-organ or single-organ failure. In addition, complications such as:

• Acute adrenal insufficiency: This is when your adrenal glands don't produce enough important hormones like cortisol.
• Acute encephalopathy: Any brain disease that affects the function or structure of the brain.
• Acute Respiratory Distress Syndrome (ARDS): Severe damage to the lungs.
• Acute transaminitis: An increase in the levels of certain enzymes that affect liver function.
• Acute tubular necrosis: Damage to the kidneys.
• Blood clot in the deep veins (Deep Vein Thrombosis - DVT).
• Disseminated Intravascular Coagulation (DIC): This causes small blood clots to form throughout the body, which increases bleeding.
• Hemolysis: The breakdown of red blood cells.
• Metabolic acidosis: Increased acidity in the body.
• Thrombocytosis (increased platelet count) or thrombocytopenia (decreased platelet count).

Some of these complications can be treated and cured, and can be reversed. But some, such as brain damage, can be permanent. That's why SIRS is so dangerous.

What can we do to prevent SIRS?

Although SIRS cannot be completely prevented, there are a few things we can do to reduce the chances of it occurring. Let's see what they are.

• Always follow good hygiene practices: Try to prevent viral infections, especially through things like hand washing.
• Keeping cuts and other wounds clean until they heal: Take care not to let even a small wound fester.
• Getting recommended vaccines on time: This can protect against many infections.
• Get proper medical treatment for chronic conditions: It is important to keep diseases like diabetes and high blood pressure under control.
• See a doctor if the symptoms of an existing condition or illness worsen: Don't ignore something minor.
• Seek immediate medical attention if you have a serious injury or suspect an infection: Prompt treatment can prevent major damage.

Final Take-Home Message

The first thing you need to remember is that SIRS (Systemic Inflammatory Response Syndrome) is a medical emergency that can be life-threatening . To prevent SIRS, it is essential to seek immediate treatment for any infection, complication of a medical condition, or serious injury. If left untreated, SIRS can cause serious complications and even death. If you have risk factors for SIRS (e.g., weakened immune system, chronic illness), talk to your doctor about how to manage those risks, what the symptoms of SIRS are, and what to do if they occur. Take care of your health and be informed. That's the most important thing! SIRS, Systemic Inflammatory Response Syndrome, Sepsis, Sepsis, Inflammation, Infection, Body's Response, Emergency Treatment