Computed Tomography (CT or CAT) Scan of the Kidney

The body takes nutrients from food and converts them to energy. After the torso has taken the food that it needs, godforsaken products are left behind in the intestine and in the rake .
The kidneys and urinary system keep chemicals, such as potassium and sodium, and water system in balance, and remove a character of waste, called urea, from the blood. Urea is produced when foods containing protein, such as kernel, poultry, and certain vegetables, are broken down in the body. Urea is carried in the bloodstream to the kidneys .
Two kidneys, a couple of purple-brown organs, are located below the rib toward the middle of the back. Their function is to :

  • Remove liquid waste from the blood in the shape of urine

  • Keep a static balance of salts and early substances in the blood
  • Produce erythropoietin, a hormone that aids the formation of red blood cells .
  • Regulate rake pressure

The kidneys remove urea from the blood through bantam filtering units called nephrons. Each nephron consists of a ball formed of small rake capillaries, called a glomerulus, and a small tube called a nephritic tubule .
Urea, together with water system and other pine away substances, forms the urine as it passes through the nephrons and down the nephritic tubules of the kidney .

What are the reasons for a CT scan of the kidney?

A CT scan of the kidney may be performed to assess the kidneys for tumors and other lesions, obstructions such as kidney stones, abscesses, polycystic kidney disease, and congenital anomalies, particularly when another type of examination, such as X-rays or physical examen, is not conclusive. CT scans of the kidney may be used to evaluate the retroperitoneum ( the back assign of the abdomen behind the peritoneal membrane ). CT scans of the kidney may be used to assist in needle placement in kidney biopsies .
After the removal of a kidney, CT scans may be used to locate abnormal masses in the empty space where the kidney once was. CT scans of the kidneys may be performed after kidney transplants to evaluate the size and location of the new kidney in relation to the bladder .
There may be other reasons for your doctor to recommend a CT scan of the kidney .

What are the risks of a CT scan?

You may want to ask your doctor of the church about the sum of radiation used during the CT procedure and the risks related to your particular situation. It is a well mind to keep a record of your past history of radiation exposure, such as previous CT scans and other types of X-rays, so that you can inform your sophisticate. Risks associated with radiotherapy exposure may be related to the accumulative count of x ray examinations and/or treatments over a long period of time .
If you are meaning or suspect that you may be fraught, you should notify your doctor. radiotherapy exposure during pregnancy may lead to give birth defects .
If contrast media is used, there is a risk for allergic reaction to the media. Patients who are allergic to or sensitive to medications should notify their sophisticate. You will need to let your doctor know if you have ever had a reaction to any contrast media, and/or any kidney problems. A reported seafood allergy is not considered to be a contraindication for iodinate line .
Patients with kidney failure or other kidney problems should notify their doctor. In some cases, the contrast media can cause kidney bankruptcy, specially in patients with underlie kidney problems or dehydration. Patients taking the diabetes medication metformin ( Glucophage ), or its derivatives, who receive contrast are at increase risk of developing a condition called metabolic acidosis, or an insecure deepen in rake ph, and the drug may be halted for 48 hours after the procedure .
There is a little gamble of contrast substantial escape from the IV tune ( known as contrast eruption ), which may cause swelling, stinging pain, or hide wrong at the IV locate .
There may be early risks depending on your specific medical condition. Be certain to discuss any concerns with your doctor prior to the procedure.

certain factors or conditions may interfere with the accuracy of a CT scan of the kidney. These factors include, but are not limited to, the follow :

  • metallic objects within the abdomen, such as surgical clips
  • barium in the intestines from a holocene barium study
  • late tests involving media or other alien substances

How do I prepare for a CT scan?

If you are having a calculate imaging angiography ( CTA ) or virtual colonoscopy with Johns Hopkins radiology, you will be given particular instructions when you make your appointee .
PRECAUTIONS : If you are fraught or think you may be pregnant, please check with your doctor before scheduling the examination. early options will be discussed with you and your doctor of the church .
CLOTHING : You may be asked to change into a patient gown. If so, a gown will be provided for you. A locker will be provided to secure personal belongings. Please remove all piercings and leave all jewelry and valuables at home .
CONTRAST MEDIA : connecticut scans are most frequently done with and without a line media. The contrast media improves the radiologist ‘s ability to view the images of the inside of the body .

  • Some patients should not have an iodine-based contrast media. If you have problems with your kidney routine, please inform the access center representative when you schedule the appointment. You may be able to have the scan performed without contrast media or have an alternative image examination .
  • You will be asked to sign a accept shape that will detail the risks and side-effects associated with contrast media injected through a minor tube places in a vein called an intravenous ( IV ) line .
  • The most common character of CT scan with line is the double contrast sketch that will require you to drink a contrast media before your examination begins in addition to the IV contrast. The more line you are able to drink, the better the images are for the radiologist to visualize your digestive nerve pathway .

ALLERGY : Please inform the access center spokesperson when you schedule your computerized tomography scan if you have had an allergic chemical reaction to any line media. IV contrast will not be administered if you have had a severe or anaphylactic reaction to any contrast media in the past. If you had mild to moderate reactions in the past, you will probable need to take medication prior to the CT scan. These plans will be discussed with you in detail when you schedule your examination. Any know reactions to a line media should be discussed with your personal doctor .
EAT/DRINK : If your doctor ordered a CT scan without contrast, you can eat, drink and take your order medications anterior to your examination. If your doctor of the church ordered a CT scan with contrast, do not eat anything three hours prior to your CT scan. You are encouraged to drink clear liquids. You may besides take your order medications prior to your examination.

DIABETICS : Diabetics should eat a light breakfast or lunch three hours prior to the scan time. Depending on your oral medication for diabetes, you may be asked to discontinue consumption of the medicine for 48 hours after the CT scan. If you have a CT scan with Johns Hopkins radiology, detail instructions will be given following your examination .
MEDICATION : All patients can take their official medications as usual .
Based on your aesculapian condition, your doctor may request other specific planning .

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