Skip to main content
Submitted by Dr S. Patel on 22 May 2017

This time in our Health by Numbers/Medical Tests series, Dr Shital Patel takes a look at our electrolyte levels in our blood. An electrolyte imbalance, commonly caused by loss of body fluids through prolonged vomiting, diarrhoea, sweating or high fever, can result in various health disorders, like restlessness, anxiety, kidney diseases or even cardiac arrest.

An Electrolyte Panel is a blood test that measures the common minerals in the body such as sodium, calcium, chloride, magnesium, phosphorous, and potassium. This also includes bicarbonate or CO2 that takes the form of bicarbonate in blood. CO2 is the waste product of metabolism. Electrolytes are essential for the proper functioning of the heart, muscles and brain as they are needed to maintain balance in the body fluids.

An electrolyte panel blood test may be ordered as part of a regular health check or to check on any electrolyte changes.

SODIUM:

A sodium blood test, also called Serum sodium test allows a doctor to check on the sodium levels in the body. Sodium is an important mineral and electrolyte that is necessary for functioning of cells in the body and maintaining electrolyte balance. It is also called Na+.

Sodium is commonly found in foods that have them naturally or during cooking. It can be in the form of sodium chloride (salt) or as sodium bicarbonate (baking soda). It is also found in certain medications, such as paracetamol, aspirin, soluble ibuprofen, alka seltzer and laxatives and personal care products such as toothpaste, mouthwash, denture cleansers etc.

The blood, plasma and the lymph contain about 85% of the sodium in the body. A hormone called aldosterone which is produced by the adrenal gland is known to control some of the sodium levels via the kidneys. Apart from urine, sodium is also lost via stool and sweat. 

Normal results for sodium are 135 to 145 mEq/L (milliequivalents per liter), but these values may vary slightly from lab to lab.

High Sodium levels (Hypernatremia):

A high sodium level in the blood is also called Hypernatremia. This can be caused by several factors such as:

  • A high-sodium diet. (Learn about the DASH Diet) 
  • Dehydration or not drinking enough water. 
  • Water level imbalance due to certain medicines like diuretics, severe vomiting, diarrhea, Kidney disease, Cushing’s syndrome, diabetic ketoacidosis, diabetes insipidus, etc. 
  • High aldosterone levels or hyperaldosteronism.

Low Sodium levels (Hyponatremia):

A low sodium level in blood is termed Hyponatremia. Causes include:

  • Drinking too much water (psychogenic polydipsia). 
  • Poor nutrition.
  • Water loss from body due to excessive sweating, vomiting or diarrhea.
  • Underlying conditions such as underactive thyroid or adrenal glands, kidney disease, liver cirrhosis, heart failure, cystic fibrosis, SIADH (syndrome of inappropriate antidiuretic hormone secretion) etc.

Factors that may affect results:

  • Current medications such contraceptive pills, corticosteroids, antibiotics, antidepressants, heparin, estrogens, NSAIDs, lithium, hypertensive pills and diuretics.
  • Having high blood sugar levels
  • Recent saline IV fluid injection during a hospital stay.

Next in the series: Importance of Right Potassium Levels

 

Stories

  • Uncontrolled Diabetes Increases the Risk of Dental Diseases
    Dr Paromita Ganguli, Senior Dental Surgeon with Fortis, Calcutta, explains the correlation between diabetes and dental care, and how the former, if not controlled, can affect dental health adversely. What are the most common oral health problems affecting persons with diabetes? The stomatognathic system comprising the oral cavity, the lining mucosa, the dentition, the periodontium supporting bone muscles and nerves are usually all affected with diabetes.  The most common diseases are:…
  • partial image of a woman holding her neck indicating a thyroid problem
    My Medication Caused Bone Health Deterioration
    Parul, 48 from Mumbai talks about tackling hypothyroidism in her own way, accompanied by food cravings and a debilitating bone health. Please tell us a bit about your condition  I have hypothyroidism. I need to take Eltroxin every day When were you diagnosed? I was diagnosed in 1995, 3 months after the birth of my first child. I was around 25 years old at the time. What were the early symptoms? I noticed a small swelling around my neck area one day and decided to get it checked. Initially…
  • A stock image of a doctor examining the thyroid of a woman
    Don’t Let Thyroid Throw You off Balance
    Nearly 42 million people in India suffer from thyroid diseases. Thyroid dysfunction can play havoc with your life and normal functioning, if left uncontrolled. Dr. Manoj Chadha, Consultant Endocrinologist at Hinduja Healthcare Surgical, helps us understand the various complications of thyroid disorder and the importance of early detection and management. What are the 5 common thyroid problems and disorders? Hypothyroidism [Decreased function of thyroid gland] Hyperthyroidism [Overfunction of…
  • Image shows profile pic of Dr. Shailesh Shrikhande, Chief Surgical oncologist - Gastrointestinal and Hepato-Pancreato-Biliary Service, Tata Memorial Center, Mumbai.
    Pancreatic Cancer: Latest Treatment Options and Other Questions
    In our AsktheDoctor series, Dr Shailesh Shrikhande of Tata Memorial, Mumbai helps us better understand one of the most sudden and deadly cancers - Pancreatic Cancer. Also its relation with diabetes and the need for palliative surgery.  1.    There was a report on rising incidence of pancreatic cancer in India. What are the possible reasons? According to SEER database (2008-2012), incidence of the pancreatic cancer is static globally (including India) and incidence in India…
  • Stock image of vegetables, legumes and nuts
    How to Prevent Diabetes if You Are At Pre-Diabetic Stage
    Diabetes continues to affect so many people, who continue to struggle to contain and manage it.  Meenu Agarwal, a clinical dietician and nutritionist based in Singapore shares tips on how to prevent diabetes.  There are two stages where if detected, diabetes can be brought to control more easily: Pre-Diabetes and Gestational Diabetes Pre-diabetes: It means that the cells in your body are becoming resistant to insulin or your pancreas is not producing as much insulin as required…
  • Medications that Increase or Decrease Blood Glucose Levels!
    In the second part of the series on drug interactions that persons with diabetes should watch out for, we talk of which medicines increase or decrease your blood glucose level and what you should watch out for. Often persons with diabetes are on medications other than the diabetes drugs (oral or injectable). They may be on some medications for life for chronic conditions (such as thyroid, mental disorders etc) or acute conditions (such as allergies, infections etc). Drug interactions are known…
  • Image of a jar of water with cucumber and mint. Risk of Dehydration in Winter
    Are You Drinking Enough Water in Winter?
    People often fail to recognize the significant dangers of dehydration in winter, dismissing it as a health concern of hot, summer months. Dr Shital Raval corrects this common misconception and advocates why water is crucial even during the cold weather to stay energized. Dehydration is a hidden threat in the months of winter when many people forget to drink as much water as they do in hot summer months. This is a common psychological mistake as we easily forget about hydration in the cold…
  • Is Bariatric Surgery a Good Choice for Controlling Diabetes?
    Bariatric-surgery or weight-loss surgery has been shown to help improve or reverse many obesity-related conditions such as Type 2 diabetes, high blood pressure, heart disease, and more. Dr. Jaydeep Palep, Bariatric Surgeon at Nanavati Hospital, provides in-depth information on how it can have a positive effect on the health of obese individuals. Bariatric surgery has emerged as a treatment option for obesity and is increasingly recognized to have benefits for glycemic management in patients…
  • Diabetes Medications and their Interactions with Other Medicines
    Most people with chronic conditions take more than 1 drug. According to one study those over the age of 60 take 5 drugs on an average. These can cause unexpected reactions and drug-to-drug interactions. Here is what you need to know: What is drug-to-drug interaction? When a drug taken along with another drug causes an unwanted or counter-productive interaction, such that it affects the activity and efficacy of the other drug, it is term as a drug-to drug interaction. For diabetic patients, this…
  • Roasted Methi Chicken - Diabetes and Heart Friendly Recipe
    A healthy and tasty protein rich, low fat recipe good for everyone - especially people with diabetes contributed by Diabetes Awareness and You Ingredients: Chicken (Boneless): 50 gms Sour curd : 50 gms Ginger: 1 teaspoon (Paste) Garlic: 1 teaspoon (Paste) Green chillies: 1 teaspoon (Paste) Salt to taste Methi saag: 20 gms (Paste) Oil: For Brushing 1 teaspoon 2.5 ml Cabbage Leaf: 1 big piece Lime Juice: 1 teaspoon (Juice) Procedure: 1. Wash Chicken Properly 2. Marinate with all the ingredients…