Kidney and Gallbladder Ultrasound in Ajax

The kidneys and the gallbladder have very little in common. One pair filters your blood and makes urine; the other is a small pouch that stores bile for digestion. They sit in different parts of the abdomen and do completely different jobs. Yet they are two of the organs most often examined with ultrasound, and the two scans share a surprising amount of technique.

This article looks at each organ in turn: where it sits, what an ultrasound can show about it, why a health-care provider might request the scan, and what the examination involves from your point of view. It is written for patients in Ajax and the surrounding communities who have been referred for one or both of these exams and want to understand them better.

One note before we begin. This is general education, not medical advice. If you have symptoms, or questions about why your scan was ordered, your doctor or nurse practitioner is the right person to ask.

Where these organs are, and why it matters for the scan

Knowing roughly where each organ lives explains a lot about how you will be positioned on the exam bed.

• The gallbladder sits on the right side of the upper abdomen, tucked under the liver and partly beneath the lower ribs.
• The kidneys are further back, one on each side of the spine, roughly at the level of the lowest ribs. They are behind most of the abdominal contents rather than in front of them.

Because both organs are partly shielded by ribs, lungs and bowel, the sonographer has to find angles that avoid those obstacles. That is why kidney and gallbladder scans often involve rolling onto your side, raising an arm, or taking a deep breath and holding it.

The gallbladder ultrasound

What the gallbladder does

Your liver produces bile continuously. Between meals, the gallbladder stores and concentrates that bile. When you eat, particularly fatty food, it contracts and pushes bile through a system of small tubes, called bile ducts, into the small intestine to help break down fats.

What ultrasound can show

Ultrasound is often the first imaging test used to look at the gallbladder. Among other things, it can help show:

• Gallstones, which commonly appear as bright spots with a dark shadow behind them because sound cannot pass through them.
• Sludge, a thicker material that can collect in the gallbladder.
• The gallbladder wall, including whether it looks thicker than expected.
• The bile ducts, including whether they appear wider than usual.
• Polyps, small growths attached to the inner wall.

Whether any of these findings matter, and what to do about them, is a medical decision for your health-care provider. Many people have findings on a gallbladder ultrasound that need no action at all, while others need follow-up. Your report is one piece of a larger picture.

Common reasons it is requested

Providers may request a gallbladder ultrasound for a range of reasons, such as pain in the upper right abdomen, discomfort that seems linked to meals, abnormal blood tests related to the liver or bile ducts, or follow-up of a previous finding. These are examples only. If you are experiencing severe pain, fever, or yellowing of the skin or eyes, seek prompt medical attention rather than waiting for a scheduled ultrasound.

Preparation in one line

A gallbladder scan is done as part of an abdominal ultrasound and needs an empty stomach, because eating makes the gallbladder contract. The full instructions and the reasons behind them are explained in our guide to preparing for an abdominal ultrasound.

The kidney ultrasound

What the kidneys do

Each kidney filters waste and extra fluid from the blood to make urine. Urine collects in the centre of each kidney, then drains down a thin tube called a ureter into the bladder.

What ultrasound can show

A kidney ultrasound, sometimes called a renal ultrasound, can help show:

• The size and shape of each kidney, and how the two compare.
• The outer tissue of the kidney and its general appearance.
• Cysts, which are fluid-filled pockets. Simple cysts are common, particularly as people get older.
• Stones, depending on their size and location.
• Swelling of the drainage system, sometimes called hydronephrosis, which can suggest that urine is not flowing out freely.
• The bladder, which is often included so the whole urinary tract can be assessed.

Common reasons it is requested

Health-care providers may order a kidney ultrasound for reasons such as flank or side pain, blood in the urine, recurring urinary tract infections, changes in kidney function on blood tests, or monitoring of a known kidney condition. Again, these are examples. Your provider will have their own reasons for requesting the scan, and they are worth asking about if you are curious.

Preparation varies

Kidney ultrasound preparation depends on exactly what has been requested. If the bladder is part of the exam, you may be asked to arrive with a full bladder; if the kidneys are being scanned together with the rest of the abdomen, fasting may also apply. The safest approach is to confirm your instructions when you book and to check our patient preparation page. If your requisition lists more than one area, call the clinic and the team will tell you which preparation fits.

Positions and breath holds: what you will be asked to do

This is where the kidney and gallbladder scans overlap most. If you know what is coming, the instructions feel much less strange.

For the gallbladder

You will usually begin lying on your back. The sonographer will place the transducer just under the right side of your ribcage. Expect to hear:

• “Take a deep breath in and hold it.” A deep breath pushes the liver and gallbladder down below the ribs, into clearer view.
• “Roll onto your left side.” Turning moves the gallbladder into a different position and can help show whether any stones inside it shift with gravity.

You may be asked to repeat these several times. That is normal; the sonographer is collecting images from more than one angle.

For the kidneys

Kidneys are often scanned with you lying on your side, sometimes with the arm on that side raised above your head to open up the space between your ribs. The transducer may be placed on your side, toward your back, or occasionally on your back itself while you lie face down or sit up. Breath holds are common here too, because breathing moves the kidneys up and down.

If any position is difficult for you because of pain, mobility, recent surgery or another reason, let the sonographer know. There is usually more than one way to obtain the images.

Helpful things to mention at check-in

A little background information can help the sonographer plan the scan. When you check in, consider mentioning:

• Previous abdominal surgery, especially if your gallbladder has already been removed or you have had kidney surgery or procedures.
• Earlier imaging of the same area, and where it was done, so that comparison may be possible.
• A known condition, such as a single kidney, a transplanted kidney or a previously identified cyst or stone.
• Where it hurts, if you have pain, so the sonographer can pay particular attention to that area.

None of this replaces the information on your requisition, but it can make the visit run more smoothly.

What these scans cannot tell you

Ultrasound is a very useful first look, but it has limits that are worth understanding.

• Some structures are hard to see. The lower parts of the ureters and the common bile duct near the pancreas can be partly hidden by bowel gas.
• Small stones may be missed. Depending on size, location and body build, small stones in the kidneys or ducts are not always visible.
• Ultrasound shows structure, not full function. A kidney ultrasound shows what the kidneys look like. How well they are working is usually assessed with blood and urine tests.

For these reasons, a provider may sometimes recommend another type of imaging or testing afterward. That is not unusual and does not by itself mean something is wrong. It simply means a different tool may answer a particular question better.

Questions people often ask

Can both scans be done on the same day?

Often, yes. Both organs are commonly assessed together as part of a broader abdominal ultrasound. What is included depends on what your health-care provider has requested on the requisition.

Will it hurt if I already have pain in that area?

The transducer is pressed firmly at times, and if an area is already tender, you may notice it. Tell the sonographer if it becomes uncomfortable. They can adjust pressure or angle.

Why did the sonographer focus on one spot for so long?

Sonographers take many measurements and images from different angles. Spending extra time on one area is part of being thorough and is not, on its own, a sign of a problem.

How do I get my results?

The images are interpreted and a report is sent to the health-care provider who requested the exam. Your provider will review the findings with you in the context of your symptoms and history.

Booking your scan in Ajax

Rossland Diagnostic Clinic provides general ultrasound, including kidney and gallbladder exams, at Unit 102, 300 Rossland Road East in Ajax. We welcome patients from Ajax, Pickering, Whitby and across Durham Region, with free parking and ground-floor access. Learn more on our ultrasound services page, then request an appointment once you have your requisition, or call us at 905-426-3111 and we will help you get the preparation right.