How to Prepare for Your Ultrasound Appointment (By Study Type)
By Kam Chhabra, MRT(N), CCPA — Physician Relations Manager, Vitacorp
Preparation for an ultrasound isn’t one-size-fits-all. What you need to do — or not do — before your appointment depends entirely on the type of study your doctor has ordered.
Getting this right matters. Poor preparation can affect image quality, which can mean a repeat visit. Here’s a straightforward guide by study type.
Abdominal Ultrasound: Fast Beforehand
An abdominal ultrasound examines the liver, gallbladder, pancreas, spleen, kidneys, and surrounding structures.
Preparation: Fast for 4 to 6 hours before your appointment. Water is fine — stay hydrated. The reason: food causes the gallbladder to contract and releases gas into the digestive tract, both of which interfere with the images.
Morning appointments work well for abdominal studies — fast overnight, come in first thing, and you can eat after your scan.
Pelvic Ultrasound: Full Bladder Required
A pelvic ultrasound examines the uterus, ovaries, and surrounding structures.
Preparation: Drink approximately one litre of water in the hour before your appointment, and do not urinate. A full bladder acts as an acoustic window — it pushes gas-filled bowel out of the way and allows the sonographer to see the pelvic organs clearly.
Your clinic will give you the exact amount when you book, as instructions can vary slightly by patient.
Vascular (Doppler) Ultrasound: Usually No Preparation
Vascular ultrasound examines blood flow in arteries and veins — commonly used to check for deep vein thrombosis (DVT), assess arterial disease, or evaluate circulation.
Preparation: Generally none required. Wear comfortable, loose clothing that allows easy access to the area being examined — arms, legs, or neck depending on the study.
Musculoskeletal (MSK) Ultrasound: No Preparation
MSK Ultrasound examines muscles, tendons, ligaments, and soft tissue — commonly ordered for shoulder pain, tendon injuries, or soft tissue masses.
Preparation: None required. Wear or bring clothing that allows access to the area being examined.
Thyroid Ultrasound: No Preparation
Preparation: None required. A thyroid ultrasound is straightforward and typically takes 15 to 20 minutes.
General Tips for Every Appointment
Bring your requisition and OHIP card. You will need both at check-in.
Arrive a few minutes early. It allows time to complete any paperwork without rushing.
Ask when you book. If your requisition specifies a type of study you’re not sure about, call the clinic. Getting preparation right the first time means a better exam and no need to come back.
What Happens During the Exam
A sonographer applies gel to the area being examined and moves a handheld probe across the skin. The gel improves contact between the probe and your body — it’s water-based, not greasy, and wipes off easily. The exam is painless. Some pressure may be applied, but you should not feel significant discomfort.
See also: Same-day ultrasound in Etobicoke | How quickly do you get ultrasound results?
What Patients Are Saying
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Visit Us
Vitacorp Islington Station Walk In X RAY and Ultrasound Etobicoke Suite 603, 1243 Islington Ave, Etobicoke, ON M8X 1Y9 Directly across from Islington TTC Station
📞 (416) 762-3818 🌐 vitacorp.ca 📍 Get directions on Google Maps
Hours: Monday to Friday, 8am to 5pm Walk-ins welcome. OHIP accepted. No appointment needed for X-ray.
Kam Chhabra, MRT(N), CCPA is Physician Relations Manager at Vitacorp, Islington Station. She works with physicians and healthcare offices across the GTA to connect patients with fast, accessible diagnostic imaging.
Frequently Asked Questions
Do I need to fast before an ultrasound?
It depends on the type. Abdominal ultrasounds typically require fasting for 4 to 6 hours beforehand. Pelvic ultrasounds usually require a full bladder — you drink water before your appointment, not fast. Thyroid, soft tissue, and vascular studies generally require no preparation. Your clinic will give you specific instructions when you book.
How much water should I drink before a pelvic ultrasound?
Generally, patients are asked to drink about one litre of water in the hour before their appointment and not urinate. Your clinic will confirm the exact amount when you book.
What should I wear to my ultrasound appointment?
Comfortable, loose clothing that allows easy access to the area being examined. For abdominal or pelvic studies, a two-piece outfit is easier than a one-piece. Avoid tight waistbands.
Can I take my medications before an ultrasound?
In most cases, yes. If you are unsure whether your specific medication affects the exam, ask your doctor or the clinic when you book.
What if I accidentally ate before my abdominal ultrasound?
Contact the clinic before your appointment. Depending on what you ate and how long before the exam, the clinic will advise whether to proceed or reschedule. Food in the stomach can affect image quality for abdominal studies.
Do I need to do anything differently for a vascular ultrasound?
Usually not. Vascular (Doppler) ultrasounds typically require no fasting or special preparation. Wear loose, comfortable clothing that gives easy access to the area being examined.
