Dengue Shock Syndrome: Causes, Symptoms & What to Do

Imagine a young father who thought he was finally over the worst of a nasty bout of the flu. His high fever had broken at last, and he was relieved. Yet, within a few hours, rather than feeling better, he found himself feeling extremely weak, with pale and cold skin and an inability to breathe properly. What father and his family missed was that the "recovery" stage was, in fact, the onset of a far more severe illness. How can one differentiate between normal recovery and a dangerous complication? Understanding Dengue Shock Syndrome is the first step in ensuring that a common seasonal illness doesn't turn into a life-threatening crisis.

What is Dengue Shock Syndrome (DSS)?

Dengue Shock Syndrome (DSS) represents the most severe form of dengue virus infection. Normally, DSS develops from Dengue Hemorrhagic Fever (DHF). Generally, dengue fever involves high fever and joint pain, which resolve with plenty of rest. However, dengue shock syndrome occurs when the dengue virus causes blood vessels to become very "leaky."

In such a case, the liquid portion of the blood, known as plasma, tends to leak from the minute blood vessels into the body's cavities. As a result of this process, the quantity of blood within the body becomes very small. According to the WHO, this condition causes shock because there is insufficient blood for the heart to pump to the body's organs. 

Causes of Dengue Shock Syndrome

Dengue Shock Syndrome (DSS) develops because of a hyperimmune reaction and blood vessel damage, resulting in plasma leakage and shock.

Key causes include: 

1. Secondary dengue infection (antibody-dependent enhancement)

A secondary infection with other serotypes will trigger a massive immune response, worsening the situation.

2. Increased vascular leakage by cytokines

High levels of cytokines lead to increased vascular permeability, resulting in fluid loss. 

3. Virus-induced endothelial injury

The virus damages the blood vessel lining, hence causing leakage and instability.

4. Platelet dysfunction

Low platelets make coagulation difficult, thereby increasing the risk.

5. Host vulnerability factors

High viral factors, young age, and other diseases such as asthma or diabetes increase the possibility of developing this syndrome.

Overall, DSS is triggered by an immune overreaction and weakened blood vessels, leading to fluid loss and shock.

Also read: 

https://redcliffelabs.com/myhealth/dengue/ways-to-increase-platelet-count-in-dengue-naturally/

How Does It Become Dangerous?

DSS can become life-threatening because fluid leakage from blood vessels reduces blood volume. The result is low blood pressure and reduced oxygen delivery to vital organs.

Secondary infection with the dengue virus is one of the main causes of DSS. During a secondary infection, the body produces antibodies to fight the virus. Still, these same antibodies can boost viral activity (antibody-dependent enhancement), leading to inflammation and damage to blood vessel walls.

Why Is It So Critical to Understand the "Critical Phase"

The critical phase (day 3-7 since the onset of the disease), during which fluid leakage occurs, is the most threatening for the infected individual. This phase typically follows the fever's decline. While it may seem at first glance like a step towards improvement, complications begin to arise at this point.

Signs and symptoms experienced during the critical phase are:

• Hematocrit rise (plasma leakage)
• Sudden decrease in platelet count
• Pulse weakens, and the blood pressure lowers. 

The consequences without immediate treatment are:

• Circulatory shock
• Organ dysfunction
• Severe bleeding

Simply put, the critical phase is dangerous because plasma leakage causes shock.

Dengue Shock Syndrome Symptoms

Early detection of symptoms is important to prevent dangerous consequences. Whereas fever and body pains are common symptoms in the first stage of dengue infection, DSS has more severe warning signs.

Common symptoms of DSS include:

• Sudden drop in body temperature after fever
• Abdominal pain
• Continuous vomiting
• Fast heart rate or tachycardia
• Chilling and clammy skin
• Agitation and disorientation
• Breathing difficulty
• Low blood pressure 
• Bleeding from the nose, gums, and skin

Note: DSS symptoms often appear as the fever begins to subside, which can be misleading. 

When Should You Seek Immediate Help?

Dengue shock syndrome is a medical emergency. You should not wait if warning signs appear.

Seek urgent medical attention if:

• The patient becomes extremely weak or drowsy.
• There is continuous vomiting.
• Breathing becomes difficult.
• The pulse feels weak or irregular.
• There are signs of bleeding.
• Urine output decreases significantly.

Early hospitalization can prevent complications and improve the chances of recovery. 

What Happens in the Hospital? 

Once admitted, treatment focuses on careful fluid management to prevent shock:

• Intravenous (IV) fluids are given to replenish lost blood plasma and keep blood pressure up.
• Close monitoring of vital signs, heart rate, urination, hematocrit, and platelet count.
• In cases of excessive bleeding, blood or platelet transfusions may be required. 

The objective is to maintain normal blood flow and prevent organ damage until the critical leakage period ends, which occurs after 24-48 hours.

Diagnosis and Monitoring

Dengue Shock Syndrome can be diagnosed based on symptoms, medical history, and lab tests, as it tends to progress rapidly. Tissue bleeding occurs in severe cases, along with noticeable changes in blood parameters. 

Typical diagnostic procedures include:

• CBC test to measure platelet count and general blood status
• Hematocrit levels to spot any signs of plasma leak (the hallmark symptom of DSS)
• Monitoring blood pressure and heart rate to identify any DSS symptoms
• Ultrasound or chest x-ray for severe cases to determine fluid build-up

Given that DSS is highly progressive, close monitoring during the critical phase (days 3-7) is essential for timely intervention and improved outcomes.

Dengue Shock Syndrome Management and Treatment

There is no antiviral treatment available to treat dengue shock syndrome, but effective management helps save the patient.

The common treatments include:

• Controlled intravenous fluid therapy: The most critical step to restore blood volume and maintain blood pressure (overhydration is also avoided). 
• Management of electrolytes: Ensures proper organ function.
• Oxygen therapy: Given if oxygen levels drop or breathing difficulties occur. 
• Blood or platelet transfusion: Platelet transfusion is not routinely required and is used only in cases of significant bleeding. 
• Careful monitoring in ICUs: If severe, constant monitoring of the patient, including tracking vital signs, urine output, hematocrit, and platelets.

Important medical considerations:

The goal is to ensure proper blood flow without causing fluid overload, as both conditions are dangerous for DSS patients.

 Things to be avoided:

• Self-medications, especially Ibuprofen
• Excessive intake of fluids in serious conditions

Early and carefully monitored treatment during the critical 24–48-hour phase can significantly reduce complications and improve survival.

Prevention and Protection

There is no specific antiviral drug that can treat dengue. The best way out is to prevent the risk of developing Dengue Shock Syndrome by ensuring you do not have a dengue infection. This involves reducing your exposure to mosquitoes or eliminating the conditions that allow them to breed.

Effective preventive actions include:

• Eliminate standing water: Empty all containers, such as flowerpots, buckets, coolers, and old tires, which can act as breeding grounds for mosquitoes.
• Use insect repellents: Apply DEET- or picaridin-containing repellents to exposed skin.
• Dress appropriately: Always wear long-sleeved tops and pants to reduce skin exposure to the virus.
• Install window and door screens:  Ensure they fit properly to prevent mosquitoes from entering indoor spaces. 
• Sleep under a mosquito net: Of particular importance to infants, older adults, or when sleeping indoors during the day, since mosquitoes tend to be active during the day.
• Keep surroundings clean: Proper waste disposal and cleanliness help reduce mosquito breeding grounds. 

Related Link: https://redcliffelabs.com/myhealth/lifestyle/15-effective-home-remedies-for-dengue/

Who is at High Risk?

There might be some people who have a greater chance of having dengue shock syndrome.

These high-risk people are:

• Kids and senior citizens
• People with a history of dengue infection
• People with poor immunity
• Patients who do not seek medical help early on

Conclusion

It is possible that Dengue Fever can lead to Dengue Shock Syndrome, which is a dangerous condition; however, it can be prevented through proper measures and prompt actions. It is important to remain vigilant during the crucial recovery period, especially as the fever decreases.

Prompt diagnosis, constant monitoring, and proper treatment at the hospital would help mitigate risks. Instead of neglecting the disease, prompt action is necessary once symptoms appear.

Important Points to Remember:

• Pay close attention to symptoms on days 3-7 of illness.
• Do not ignore warning signs like weakness, vomiting, or bleeding.
• Consult the doctor immediately upon the appearance of symptoms.

Routine health check-ups and dengue blood tests can help detect complications before they become severe. Proper awareness and preventive actions play an important role in ensuring recovery from the disease.

FAQs

Can dengue shock syndrome be cured?

If detected early, dengue shock syndrome can be treated and managed quite successfully in hospital settings. With fluid therapy, regular monitoring, and supportive care, the patient's condition will stabilize and complications will be avoided. With proper treatment, full recovery is achieved. Late diagnosis may lead to severe conditions, making prompt treatment critical for survival and recovery.

Is dengue shock syndrome common?

The development of dengue shock syndrome is rare because it occurs primarily in severe dengue, whereas most patients are diagnosed with mild or moderate dengue. Nevertheless, about 1% of patients develop severe dengue and DSS, which is more likely with a second infection by a different virus strain.

How fast can DSS develop?

This condition develops quite rapidly, within several hours, during the critical period, which occurs on days 3 to 7. It starts when the temperature goes down. Given that symptoms can escalate abruptly, continuous monitoring of warning signs, vital parameters, and blood composition is necessary. Any slight delay in detecting such symptoms will result in rapid progression to shock. This is a period that requires close observation to ensure safety.

Can adults get dengue shock syndrome?

Yes, adults can suffer from dengue shock syndrome, but this condition is less common among adults compared to children. Some adults with a history of dengue fever, low immunity, or other ailments may be prone to this syndrome. In any case, it is important to identify the symptoms early and seek medical help for optimal results. 

Does hospitalization become necessary in such a case?

Yes, hospitalization becomes necessary for treating dengue shock syndrome since it is not possible to manage this disease at home. The patient needs constant monitoring of body functions, including blood pressure and fluid intake. This requires administering intravenous fluids to manage the situation effectively. Delaying medical care, even by a few hours, can increase the risk of serious complications.