Is it normal for babies to urinate less in summer?

Even in the summer, babies will not show very obvious symptoms of oliguria. If it occurs continuously, it means that there are some problems with the baby's body. Therefore, parents should take them for a more detailed physical examination. In this way, the specific cause of oliguria can be confirmed, so that good treatment measures can be taken. Generally speaking, it is still related to urethral diseases.

Increase: Generally, polyuria is more than 2.5 liters in 24 hours, which is seen in diabetes, diabetes insipidus, chronic nephritis, neurogenic polyuria, and in the early stage of renal transplantation when the renal tubular reabsorption function has not yet recovered.

Decrease: Urine volume <0.4 L/24 hours is oliguria, which is seen in acute glomerulonephritis, renal insufficiency, rejection reaction in renal transplant patients, dehydration, hemoconcentration, etc., while urine volume less than 0.1 L in 24 hours is anuria, such as acute renal failure and the uremic stage of renal failure.

In the absence of renal disease, urine output is a sensitive indicator of adequate tissue perfusion during extracorporeal circulation and of inferior vena cava obstruction. If the kidneys are well perfused, urine output should be at least 30 ml per hour (1 ml/kg/h). The method of collecting urine is currently to place a Foley catheter in clinical practice. The catheter is inserted using aseptic technique. After the catheter is placed, a water test should be performed to check whether the catheter is unobstructed. Collecting and recording urine volume before, during, and after extracorporeal circulation is the most valuable and easy method for determining the amount of water in the body.

The condition of renal and cardiac function, such as a patent urinary tract but low urine volume, may indicate hypovolemia, low cardiac output, insufficient extracorporeal blood perfusion, or poor drainage of the inferior vena cava, leading to increased renal venous pressure. When the urine volume is excessive, attention should be paid to supplementing potassium ions and blood volume. It is also common to measure the specific gravity of urine and conduct urine routine tests during extracorporeal circulation, and the rate of crystalloid replenishment can be adjusted accordingly. Regular measurement of urine pH can promptly correct acidosis during extracorporeal circulation. The urine pH should be maintained between 6.8 and 7.0 during extracorporeal circulation.

During extracorporeal circulation, hemochromatia may occur due to blood destruction caused by various factors. At this time, sodium bicarbonate should be given to alkaline the urine to prevent the deposition of hemoglobin in the renal tubules and cause acute renal failure. [1]