If your GP or specialist has referred you for a renal ultrasound, the short answer is this: you bring your referral, you usually arrive with a comfortably full bladder, and the scan itself is painless and uses no radiation. At UBM Scans in Menai NSW, a kidney ultrasound is a referred diagnostic scan, so a valid referral from your doctor is required before you book. The sonographer looks at your kidneys and bladder with a handheld probe and gel, and the report goes back to the doctor who referred you. This guide walks through each step so nothing about the appointment is a surprise.
Key Takeaways
- A renal ultrasound at UBM Scans needs a GP or specialist referral. It is a diagnostic scan, separate from our keepsake baby scans.
- Preparation usually means drinking water beforehand so your bladder is comfortably full. We confirm the exact instructions when you book.
- The scan uses sound waves, not radiation. You lie on a couch while the sonographer moves a probe over your abdomen and sides.
- The sonographer does not give you a diagnosis. Your report goes to your referring doctor, who explains what it means for you.
What Is a Kidney Ultrasound, and Why Might You Need One?
A kidney ultrasound uses high-frequency sound waves to build a live picture of your kidneys and, in most renal requests, your bladder. The probe sends sound into the body and listens for the echoes that bounce back, and the machine turns those echoes into an image on screen. There are no needles, no injections and no radiation involved, which is one reason ultrasound is a common first imaging step for many doctors.
Your doctor may have referred you because of urinary symptoms, discomfort in the side or back, a result from another test, or simply to take a closer look at something they noticed during an examination. We do not know your reasons and we do not need to guess at them. What matters is that your referral lists what your doctor wants examined, and the sonographer works from that request. If you are unsure why you were referred, ask your doctor before the appointment. They are the right person to explain the clinical reasoning.
At UBM Scans, renal ultrasound is one of our referred diagnostic services, alongside other ultrasound areas such as abdominal, pelvic, prostate and appendix scans. We perform ultrasound only. If your doctor has also ordered a different type of imaging, such as a CT scan or an X-ray, that will need to be arranged with another provider, because those are not services we offer.
What Does a Renal Ultrasound Actually Look At?
A renal ultrasound is a scan of the urinary tract, centred on the two kidneys and the bladder. Each part gets its own attention during the appointment.
The kidneys
The sonographer images each kidney from different angles. They look at where the kidney sits, its size and shape, and its outline. They also look at the internal structure, including the way the filtering tissue and the drainage area at the centre appear on screen. Both kidneys are examined so the images can be compared side by side.
The bladder
The bladder is easiest to see when it contains fluid, because the fluid acts like a window for the sound waves. With a fuller bladder, the sonographer can look at the bladder wall and the overall shape of the bladder. This is also why bladder ultrasound preparation matters, and we cover it in the next section.
What the scan is not
A scan produces images. It does not hand you a verdict on the day. Our sonographers do not diagnose a condition or tell you what a finding means for your health. That conversation belongs with the doctor who referred you, who can read the report alongside your symptoms, your history and any other tests.
Renal Ultrasound Preparation: Drinking Water and Other Steps
The main step in renal ultrasound preparation is having a comfortably full bladder when the scan begins. In practice, patients are usually asked to drink a set amount of water in the period before the appointment and to avoid emptying their bladder until after the scan, or at least until the sonographer says it is fine. The exact amount and timing can differ depending on what your referral asks for, so please confirm the details with us when you book rather than relying on a general guide.
A few practical points help the day go smoothly:
- Sip steadily rather than gulping. Drinking at a comfortable pace in the lead-up is gentler than trying to finish a large drink at the last minute.
- Plan your travel. A full bladder and a long drive are not a great combination, so allow enough time to arrive without rushing.
- Bring your referral. The scan cannot go ahead without it. Bring your Medicare card as well, along with any earlier imaging reports you have, as they can be useful context.
- Wear comfortable clothing. A loose top and trousers or a skirt that are easy to adjust let the sonographer reach your abdomen and sides without fuss.
- Take your usual medication unless your doctor has told you otherwise.
If your referral lists more than one area, for example the abdomen as well as the kidneys and bladder, the preparation can be different. Some abdominal scans ask for fasting, while a renal-only request usually focuses on fluids. This is exactly why we ask you to check with us first. If you become uncomfortable while waiting, tell the team. We would rather adjust the plan than have you sitting there in discomfort.
A kidney ultrasound is a calm, painless scan, and most of the preparation is simply a glass of water and your referral.
What Happens During Your Kidney Ultrasound Appointment?
When you arrive at our clinic at 10 Anzac Rd, Menai NSW, the team will check your referral and details, then bring you into the scan room. The room is quiet and private, with a couch and a screen. You will be asked to lie down and expose the area being scanned, usually the lower abdomen and the sides, with the rest of you kept covered.
The sonographer applies a warm water-based gel to your skin. The gel helps the probe glide and lets the sound waves pass cleanly into the body. They then press the probe gently against your abdomen and move it across the area. Because the kidneys sit toward the back, you may be asked to roll onto your side or, at times, onto your front so the sonographer can see each kidney clearly. You may also be asked to take a deep breath and hold it for a moment, since breathing moves the kidneys slightly.
Most people feel only light pressure from the probe. If your bladder is full, that pressure can feel a little uncomfortable, and it is fine to say so. The sonographer will concentrate on the screen and may take measurements and save images as they go. They may be quiet at times, and that is normal. They are focused on capturing the pictures your doctor has asked for, not hiding something from you.
Some scans finish with a request to empty your bladder, after which the sonographer takes a final image or two. If that applies to you, they will let you know. Afterwards, the gel is wiped away and you can get dressed, use the bathroom, and carry on with your day.
Keepsake Scans and Diagnostic Scans Are Different Services
Many people know UBM Scans for baby ultrasound, so it is worth being clear about how the two sides of the clinic differ. Our keepsake pregnancy scans, such as 3D and 4D scans, are elective and non-diagnostic, and they do not require a referral. You can read more about how those work in our guide on the difference between 2D, 3D and 4D ultrasound, or in what to know before a 3D ultrasound.
A renal ultrasound belongs to the other side of the clinic. It is a referred diagnostic scan, it requires a GP or specialist referral, and the focus is clinical rather than sentimental. The tone is different, the purpose is different, and the way results are handled is different. If you are here for a kidney scan, you can safely skip the baby content and focus on your referral and your preparation.
Book Your Referred Scan With UBM Scans
If you already have your referral, we are happy to help you book a renal ultrasound and talk through the preparation. Our current clinic hours are Monday to Thursday from 6:30pm to 8:30pm and Saturday from 8:00am to 12:00pm, which suits patients who cannot get away during the working day. Please note that hours and availability can change, so it is worth confirming when you contact us. Our second location at Macarthur Square, Campbelltown NSW operates on Saturdays by appointment.
How the Report Reaches Your Doctor
After the scan, the images are assembled into a report. That report is sent to your referring doctor, the GP or specialist whose name is on your referral. You do not need to carry paperwork from our clinic to their rooms. We do not promise a particular turnaround time, so it is sensible to book a follow-up appointment with your doctor and ask when they expect to have the report.
Please do not expect the sonographer to tell you results on the day. Interpreting a scan in the context of your health is your doctor’s role, and they are the person who can talk you through what happens next. If you have symptoms that are getting worse while you wait, such as severe or sudden pain, fever with back pain, or you feel unwell, contact your GP or go to your nearest emergency department rather than waiting for a scan appointment. Our booking line is not an emergency service.
Medicare, Cost and Referral Questions
Referred diagnostic scans may attract a Medicare rebate where current eligibility and item requirements apply. Whether your scan qualifies depends on your referral and your circumstances, and we cannot guarantee a rebate or tell you in advance what your out-of-pocket cost will be. We are not a bulk-billing provider. Because the cost of a scan depends on several factors, including the type of scan requested and your eligibility, the most reliable way to find out is to contact us directly for current pricing before your appointment.
On the referral itself, check that it is signed, dated and clearly names the scan your doctor wants. A referral that asks for a renal ultrasound lets us plan the right preparation. If anything on it is unclear, your doctor’s rooms can clarify, and our team can point out what we need to see.
Frequently Asked Questions
Do I need a referral for a kidney scan at UBM Scans?
Yes. A renal ultrasound is a diagnostic scan, and every diagnostic scan at UBM Scans requires a valid referral from a GP or specialist. Our keepsake baby scans are the only scans that need no referral.
How much water should I drink before a renal ultrasound?
The amount and timing depend on your referral and the scan requested, so we confirm the details with you at the time of booking. In general, the aim is a comfortably full bladder when the scan starts, and you are usually asked not to empty your bladder before then unless told otherwise.
Is a kidney ultrasound painful or risky?
The scan is not painful. You may feel light pressure from the probe, and a full bladder can feel uncomfortable. Ultrasound uses sound waves rather than radiation. If you feel unwell or too uncomfortable at any point, let the sonographer know.
Will I get my results on the day?
No. The sonographer will not interpret the scan for you. The report is sent to your referring doctor, who will explain what it means. We do not promise a specific report turnaround time, so ask your doctor when to expect it.
Can the same appointment cover my kidneys and bladder?
A renal ultrasound request generally covers the kidneys and bladder together. What is scanned on the day follows what your doctor wrote on the referral, so check the wording with your doctor if you are unsure.
Walking Into Your Renal Scan Prepared
A kidney ultrasound is one of the more straightforward scans to prepare for. Bring your referral, confirm your drinking instructions when you book, wear something comfortable and allow yourself enough time to arrive without rushing. The scan itself is gentle, and the sonographer will explain what they are doing along the way.
Waiting for a scan can feel unsettling, especially when you do not yet know why your doctor wanted one. That is a normal reaction. The scan is a way of gathering information so your doctor can make good decisions with you, and the report is part of a conversation that continues with them after you leave our clinic.
If you have questions about preparation, availability or what to bring, we would be glad to help before you come in.
Ready to Arrange Your Renal Ultrasound?
Our clinic is at 10 Anzac Rd, Menai NSW 2234, and our team will talk you through the next steps.