Preparing for Hepatopancreatobiliary Surgery: Scans, Blood Thinners and Diabetes Medicines

The envelope from the surgical unit is thicker than expected. Inside: a scan appointment, a fasting sheet, a form asking you to list every medicine and supplement in the house, and a paragraph, in bold, about blood thinners. You have a pill organizer with four compartments and a fridge shelf of insulin. Suddenly the operation itself feels like the simple part.

That reaction is common. Preparing for liver pancreas surgery is less about one big decision and more about a dozen small, coordinated ones, most of them made by people you may not meet until the pre-assessment clinic: radiologists, anesthesiologists, pharmacists, diabetes nurses. Their work in the weeks beforehand is what makes a long, complex operation as safe as it can be.

This article walks through that preparation the way a good pre-op nurse would: what the scans are for, why certain medicines get paused, how diabetes is handled, and what the first weeks afterward tend to look like. It does not replace your team’s instructions. It should help you understand them.

What hepatopancreatobiliary surgery actually involves

Hepatopancreatobiliary, often shortened to HPB, is the surgical specialty covering the liver (hepato), pancreas (pancreato) and the bile ducts and gallbladder (biliary). These organs share a plumbing system: bile made in the liver travels down the common bile duct, meets digestive juice from the pancreas, and empties into the first part of the small intestine. An operation on one of them almost always touches the others.

The best-known pancreatic operation is the Whipple procedure, formally a pancreaticoduodenectomy. The surgeon removes the head of the pancreas, the first part of the small intestine, the gallbladder and part of the bile duct, then reconnects the remaining pancreas, bile duct and stomach to the intestine so digestion can continue. Mayo Clinic describes the operation as typically taking 4 to 12 hours, which gives some sense of its scale.

A liver resection, or hepatectomy, removes part of the liver. The liver is unusual among human organs in that the remaining portion can regenerate, growing back toward its former volume over the following weeks and months. That regrowth is the reason surgeons can remove a substantial share of the organ, provided what stays behind is healthy enough to cope in the meantime.

Other HPB operations include removing the tail of the pancreas (distal pancreatectomy), removing the whole pancreas (total pancreatectomy), reconstructing or bypassing blocked bile ducts, and removing the gallbladder together with nearby tissue. Some are performed through a single long incision; others use laparoscopic or robot-assisted keyhole techniques. Which approach suits a given person depends on where the problem sits, how it relates to major blood vessels, and the surgeon’s judgment, not on any general rule.

Whatever the exact operation, preparation follows the same logic: know the anatomy precisely, know the body’s reserve, and control the variables that surgery cannot.

Is pancreatic surgery a major surgery? Why liver and pancreas operations are different

Yes, and it helps to understand why rather than simply hear it. Two features set these operations apart from, say, a hernia repair or a straightforward gallbladder removal.

The first is blood supply. The liver receives roughly a quarter of the heart’s output, and the pancreas sits wrapped around the superior mesenteric vessels and close to the portal vein, the large vessel carrying blood from the intestine to the liver. Every cut is planned around these vessels, which is why the scans described later matter so much.

The second is what happens after the tissue is removed. Pancreatic juice is rich in enzymes that digest protein and fat. When the surgeon joins the cut surface of the pancreas to the intestine, that join has to heal in the presence of the very enzymes that break tissue down. A leak from this connection, known as a pancreatic fistula, is among the most closely watched complications after a Whipple procedure, and Mayo Clinic lists it alongside bleeding, infection, delayed stomach emptying and new or worsened diabetes as recognized risks.

Liver resection carries its own specific concern. If too little functioning liver is left, or the remaining tissue is damaged by fatty liver disease, cirrhosis or prior chemotherapy, the organ may struggle to clear toxins and make clotting proteins in the days after surgery. Surgeons therefore measure how much liver they can safely take, not just how much they need to.

None of this is meant to alarm. It explains why the preparation is thorough: a longer anesthetic, a careful look at the heart and lungs, attention to nutrition, and a medication plan drawn up days in advance. People do come through these operations well. The groundwork is a large part of why.

Who is usually offered HPB surgery, and who is asked to wait

Surgery on the liver, pancreas or bile ducts is offered for a range of reasons: cancers of the pancreas, bile duct or liver, cancers that have spread to the liver from elsewhere (most often bowel cancer), benign but troublesome cysts, chronic pancreatitis with blocked ducts, and some non-cancerous tumors that could change over time. In cancer, the central question is whether the disease can be removed completely with a margin of healthy tissue. The NHS notes that surgery to remove pancreatic cancer is generally only possible when the tumor has not spread to distant organs or wrapped around major blood vessels.

Several situations commonly lead a team to recommend waiting or a different route first:

• Jaundice from a blocked bile duct. Deep yellowing of the skin and eyes signals bile backing up into the blood. Some teams place a small tube called a stent to relieve the blockage before surgery; others proceed directly. The choice depends on symptoms, infection risk and how soon the operation can happen.
• Chemotherapy before surgery. For some pancreatic and liver cancers, treatment given first, called neoadjuvant therapy, is used to shrink the tumor or test how the disease behaves before committing to a large operation.
• Poor nutrition or recent weight loss. A body short of protein heals slowly. A few weeks of dietary support, sometimes with pancreatic enzyme supplements if fat is not being absorbed, may be advised.
• Uncontrolled diabetes, active infection, unstable heart disease or a recent clot. Each raises the risk of the anesthetic and the recovery. Stabilizing them first is a routine part of the plan, not a rejection.

Being asked to wait can feel like losing time. In most cases it is the opposite: the team is buying a safer operation. Ask them to explain what the delay is meant to achieve and how they will know when you are ready.

Scans before liver and pancreas surgery: what each one shows

Imaging is where HPB preparation begins in earnest, because surgeons operate on the picture before they operate on the patient. Expect at least one of the following, and sometimes several.

CT scan with contrast. A computed tomography scan builds cross-sectional images from X-rays. For the pancreas and liver it is usually done with an iodine-based dye injected into a vein, and images are captured in phases timed to when the dye reaches the arteries, then the veins. This shows the tumor’s edges and, critically, its relationship to the vessels that decide whether removal is possible. Mayo Clinic lists CT among the standard tests used to stage pancreatic and liver cancers.

MRI and MRCP. Magnetic resonance imaging uses magnets rather than radiation and is particularly good at showing liver tissue and small lesions. MRCP, magnetic resonance cholangiopancreatography, is an MRI sequence that maps the bile and pancreatic ducts without any instrument entering the body.

Endoscopic ultrasound (EUS). A thin flexible tube with an ultrasound probe at its tip is passed through the mouth to the stomach and duodenum. From there it can image the pancreas from a few millimeters away and, if needed, take a tissue sample with a fine needle.

PET-CT. A small amount of radioactive sugar is injected; active cells take it up and light up on the scan. It is used selectively, mainly to look for disease outside the operating field.

Liver volumetry. Software measures the volume of the liver the surgeon intends to leave. If it looks too small, a procedure called portal vein embolization may be done first to encourage that part to grow before the operation.

Scans also drive the medication plan. The contrast dye used in CT is the reason one common diabetes tablet is often paused around imaging, explained next.

Contrast dye, kidney checks and metformin: why they are linked

People are often surprised that a scan appointment comes with instructions about a diabetes tablet. The connection runs through the kidneys.

Iodine-based CT contrast is filtered out of the blood by the kidneys. In people whose kidney function is already reduced, the dye can temporarily reduce it further, a phenomenon radiologists call contrast-associated acute kidney injury. Most people recover kidney function without lasting harm, but the risk is why a blood test for creatinine and estimated glomerular filtration rate (eGFR), a measure of how well the kidneys filter, is usually taken before the scan.

Metformin, the most widely prescribed first-line tablet for type 2 diabetes, is cleared by the kidneys too. If kidney function drops suddenly, metformin can build up and, rarely, contribute to a dangerous acid imbalance called lactic acidosis. To avoid stacking one risk on another, radiology departments commonly ask people with reduced kidney function to hold metformin around the time of contrast and restart once a repeat kidney test is reassuring. People with normal kidney function may not need to pause at all. The decision, and the timing, belong to the radiology and diabetes teams, who will tell you exactly what applies to you.

Two other practical points around contrast:

• Tell the department if you have ever reacted to contrast dye, have asthma, or have a shellfish allergy history. True contrast allergy is uncommon but is managed differently.
• Drink normally before and after the scan unless you have been told to restrict fluids. Good hydration helps the kidneys clear the dye.

MRI contrast uses a different substance, gadolinium, which raises different questions and is also screened against kidney function. Whichever scan you are having, the safest approach is to answer the pre-scan questionnaire in full and bring your medication list.

Blood tests and the fitness assessment before a long anesthetic

Once the anatomy is mapped, the question shifts from “can this be removed?” to “can this body tolerate removing it?” The pre-operative assessment clinic exists to answer that.

Blood tests usually cover a full blood count (looking for anemia, which is common with cancer and with chronic bleeding), kidney function, liver function including bilirubin and albumin, clotting tests such as the INR, and a glycated hemoglobin (HbA1c), which reflects average blood sugar over roughly the preceding three months. Tumor markers such as CA 19-9 or alpha-fetoprotein may be added; they help track disease but do not decide fitness.

Heart and lung checks follow. An electrocardiogram records the heart’s rhythm. An echocardiogram, an ultrasound of the heart, may be requested if there is a murmur, breathlessness or a history of heart disease. Some units use cardiopulmonary exercise testing, in which you pedal a stationary bike while breathing through a mask so the team can measure how efficiently your heart and lungs deliver oxygen. The result helps predict how well you will cope with the physiological strain of a long operation and guides how much support you may need afterward.

The anesthesiologist will also want to know about sleep apnea, previous reactions to anesthesia, loose teeth or dental work, and how far you can walk on the flat before stopping. These questions are not box-ticking; they change how the airway is managed and how pain relief is planned.

If any of this uncovers a problem, the response is usually to fix what can be fixed. Iron infusions for anemia, a cardiology review, a course of breathing exercises, tighter blood sugar control. The NHS describes this kind of pre-assessment as standard before major operations, and it is the moment to be completely candid about smoking, alcohol and supplements. Nothing you disclose will be used against you; withheld information is what causes trouble.

Stopping blood thinners before surgery: what actually happens and why

Blood thinners are the medicine group that causes the most anxiety before HPB surgery, partly because the instructions can seem contradictory: stop them so you don’t bleed, but don’t stop them or you’ll clot. Both concerns are real, and the plan is a balance struck by your surgical, cardiology and pharmacy teams together.

MedlinePlus groups these medicines into two broad families. Anticoagulants slow the chemical cascade that turns liquid blood into a clot. They include warfarin, which works by blocking vitamin K; the direct oral anticoagulants such as apixaban and rivaroxaban, which block a single clotting factor; and heparins, given by injection. Antiplatelet medicines, such as aspirin and clopidogrel, work differently: they stop platelets, the tiny cell fragments that form the first plug at a bleeding site, from sticking together.

Liver and pancreas operations involve large vessels and, in the liver’s case, an organ that itself makes clotting proteins. Surgeons therefore usually want clotting close to normal on the day. How far in advance a medicine is paused depends on how long it stays active in the body. Warfarin’s effect fades over days and is checked with an INR blood test; most direct oral anticoagulants clear faster, though slower if kidney function is reduced; antiplatelet effects persist for the lifespan of the affected platelets. Your team will give you a specific date for each medicine.

Some people cannot safely go without protection for even a few days, for instance those with a mechanical heart valve or a very recent clot. For them, teams sometimes use a short-acting injectable anticoagulant as a “bridge,” stopping it close to surgery and restarting soon after. Others with a recently placed coronary stent may be asked to continue aspirin throughout.

The only firm rule for you: never stop, restart or skip a blood thinner on your own initiative. Ask for the plan in writing.

Medicines that matter around HPB surgery: a summary table

The table below is a map, not a set of instructions. It shows why each class of medicine gets attention before surgery and who typically makes the decision. Timing and whether to pause at all are individual, and every line should be read as “discuss with your team.”

Medicine class	What it does	Why it matters around surgery or scans	Who usually decides
Vitamin K antagonists (warfarin)	Blocks vitamin K-dependent clotting factors	Effect fades over days; checked by INR before operating	Surgical team with anticoagulation clinic or cardiology
Direct oral anticoagulants	Block one clotting factor directly	Clear faster than warfarin; slower with reduced kidney function	Surgical team, pharmacist, prescriber
Antiplatelets (aspirin, clopidogrel)	Stop platelets sticking together	Effect lasts the life of the platelet; sometimes continued for stents	Surgeon with cardiology
Metformin	Reduces liver glucose output	Held around contrast if kidney function reduced; often held on day of surgery	Radiology and diabetes team
Sulfonylureas	Push pancreas to release insulin	Can cause low sugar while fasting	Diabetes team, anesthesiologist
SGLT2 inhibitors	Make kidneys excrete glucose	Linked to ketoacidosis when fasting or unwell; usually paused beforehand	Diabetes team, anesthesiologist
GLP-1 receptor agonists	Slow stomach emptying, boost insulin	Food may linger in stomach; aspiration concern under anesthesia	Anesthesiologist, prescriber
Insulin	Replaces or supplements the body’s own	Continued but adjusted; often switched to an intravenous infusion in hospital	Diabetes team, anesthesiologist
Herbal supplements (fish oil, ginkgo, garlic, St John’s wort)	Varied	Some affect bleeding or interact with anesthetic drugs	Anesthesiologist

Two habits make this table useful in practice. Bring every box, bottle and pen to the pre-assessment visit, or photograph the labels, so nothing is missed. Then ask for a single written schedule showing each medicine, the last day to take it and the expected day to restart. If two clinicians give you different instructions, say so; reconciling them before the operation is far easier than after.

Diabetes medication before surgery: insulin, tablets and the newer injections

Diabetes and HPB surgery are entangled in a way few other specialties share. The pancreas makes insulin. Removing part of it can reduce insulin supply; a tumor in it may already have done so. Mayo Clinic lists new or worsening diabetes among the recognized outcomes after a Whipple procedure, so the diabetes plan is not a side issue but part of the operation itself.

Before surgery, the aim is steady blood sugar: not so high that healing and infection defenses suffer, not so low that fasting becomes dangerous. Your HbA1c result guides how urgently control needs improving. If it is well above target, the team may spend a few weeks adjusting treatment before setting a date.

Tablets. Metformin is commonly held on the day of surgery and around contrast scans, as described earlier. Sulfonylureas, which push the pancreas to release insulin regardless of whether you have eaten, are typically held while fasting because they can drive sugar too low. SGLT2 inhibitors, which make the kidneys excrete glucose, carry a specific risk of ketoacidosis, a dangerous build-up of acids, in people who are fasting or unwell; they are usually paused for a period before surgery.

Newer injections. GLP-1 receptor agonists slow stomach emptying. Under anesthesia, food still sitting in the stomach can be inhaled into the lungs, so anesthesiologists ask about these medicines specifically and may advise holding a dose beforehand or change how they protect the airway.

Insulin. People who use insulin do not stop it. Long-acting insulin is usually continued with an adjustment, and in hospital many are moved onto a variable-rate intravenous insulin infusion with hourly glucose checks until eating resumes.

Bring your glucose meter and, if you use one, your continuous monitor. Ask who to call if your sugars run unexpectedly high or low in the days before admission. The answers should come from the diabetes team or prescriber, and they should be written down.

Preparing for liver pancreas surgery: how to use the weeks beforehand

Surgeons increasingly talk about prehabilitation, the idea that the body can be trained for an operation the way an athlete trains for an event. The evidence is still maturing, and no program guarantees a smoother course, but the principles rest on mainstream surgical guidance and are low-risk.

Move every day. Walking, cycling or swimming at a pace that makes you slightly breathless builds the heart and lung reserve the anesthesiologist will be relying on. Add simple strength work, such as sit-to-stand from a chair, because leg strength is what gets you walking on the ward.

Stop smoking as early as possible. The NHS highlights smoking as a modifiable risk for wound and chest complications after surgery, and the benefit grows with every smoke-free week. Ask your team for support; nicotine replacement is generally considered acceptable before surgery, but confirm.

Reduce alcohol. The liver is doing the recovering; alcohol makes its job harder and interferes with clotting and healing. If you drink heavily, tell the team, because sudden withdrawal in hospital is dangerous and can be prevented.

Eat for protein. Weight loss is common with pancreatic and biliary disease, partly because a blocked pancreatic duct means fat is not digested. Pale, greasy, floating stools suggest this. Dietitians may recommend supplement drinks and, where indicated, pancreatic enzyme capsules taken with meals. Being underweight or losing weight fast is a bigger risk than carrying extra weight in this context.

Sort the practical. Arrange who will drive you, who will be at home in the first week, and where a single flight of stairs can be avoided if needed. Fill a folder with your medication schedule, scan letters and contact numbers.

How to prepare for Whipple surgery, or for a liver resection, comes down to the same four levers: fitness, nutrition, stopping the things that impair healing, and knowing exactly what to do with each medicine.

The last 24 hours: fasting rules, showering and what to bring

The final day before admission is mostly about following instructions precisely, because small deviations can postpone the operation.

Fasting. An empty stomach protects the lungs during anesthesia. The NHS explains that people are usually asked not to eat for about six hours before an operation while clear fluids may be allowed until about two hours before, though the exact times vary by hospital and by individual circumstances. If you take a GLP-1 receptor agonist, your anesthesiologist may ask for a longer gap or a different approach. Some enhanced-recovery programs give a clear carbohydrate drink a couple of hours before surgery to reduce insulin resistance; if you have diabetes, the team will say whether this applies to you.

Medicines on the morning. Follow the written schedule. Most heart and blood pressure tablets are taken as usual with a sip of water; some, particularly certain blood pressure medicines and diuretics, are held. Diabetes medicines follow the plan described earlier. Do not guess.

Skin and hair. A shower with ordinary soap the night before or the morning of surgery is typically advised. Do not shave the operative area yourself; if hair removal is needed, the team uses clippers in hospital, because razors cause tiny cuts that raise infection risk.

Jewelry, nails and glasses. Remove rings and piercings; nail polish and false nails interfere with the finger probe that measures oxygen. Bring glasses, hearing aids and dentures in labelled cases.

Bring. Your medicines in their original packaging, your glucose meter, loose comfortable clothes, slip-on shoes with grip, phone charger, and something to read. Leave valuables at home.

Tell someone if you develop a fever, cough, vomiting, a new rash or a flare of jaundice in the 48 hours before admission. The operation may still go ahead, but the team needs to know.

How painful is pancreatic surgery or a liver resection? An honest answer

People search this question more than almost any other, and the honest answer is: it hurts, it is expected to, and controlling it is a planned part of the operation rather than an afterthought.

The incision for an open Whipple or liver resection runs across or down the upper abdomen, through skin, fat and muscle. Muscle and the lining of the abdomen are richly supplied with pain nerves. Deep breathing, coughing and getting out of bed all pull on the wound. Keyhole approaches leave smaller wounds but still involve stretching the abdomen with gas and working on deep organs, so soreness is real there too.

Anesthesiologists therefore layer pain relief. Common tools include an epidural, a fine tube placed alongside the spinal nerves that delivers a continuous local anesthetic; patient-controlled analgesia, a pump you press yourself with built-in safety limits; wound catheters that bathe the incision in local anesthetic; nerve blocks placed under ultrasound; and regular non-opioid painkillers to reduce how much opioid is needed. The mix is chosen for you, and it changes day by day as you recover.

What good pain control looks like is not zero pain. It is pain that lets you take a deep breath, cough, sit in a chair and walk the corridor with a nurse. Those movements are not optional extras; they are how pneumonia and blood clots are prevented. If pain stops you doing them, say so early and clearly, because a plan can be adjusted only if the team knows it is not working.

Two things worth knowing in advance: shoulder-tip pain after keyhole surgery comes from gas irritating the diaphragm and usually settles within days; and pain that suddenly worsens, spreads, or comes with fever or a fast heart rate is not ordinary post-operative soreness and needs to be reported.

What the following days and weeks usually look like

Recovery from HPB surgery has a recognizable shape, even though the pace varies widely between individuals.

The first night is often spent in a high-dependency or intensive care area, not because something has gone wrong but because the team wants continuous monitoring of blood pressure, urine output and blood sugar after a long anesthetic. You may wake with a urinary catheter, one or more drains near the operation site, an intravenous line and possibly a fine tube through the nose into the stomach.

Days one to three center on sitting out, standing, walking short distances and starting sips of fluid. Enhanced-recovery programs, which many units follow, aim to remove tubes and restart eating as early as is safe. Drain fluid is tested for pancreatic enzymes after a Whipple to check the join is holding.

The rest of the hospital stay. Mayo Clinic describes a typical hospital stay after a Whipple procedure as about a week, with some people needing longer. Liver resections vary with the extent of surgery. Appetite returns slowly; small frequent meals often work better than three large ones.

The first weeks at home. Fatigue dominates. Walking a little further each day is the main task. Wounds are checked, and any pancreatic enzyme or diabetes medicine is reviewed, since needs can change as the remaining pancreas adapts. Bowel habit may take time to settle.

Longer term. The NHS notes that recovering fully from major pancreatic surgery can take several months. Blood thinners paused before surgery are usually restarted once the surgeon is satisfied bleeding risk has settled, on a date the team specifies. Follow-up scans and clinic visits are scheduled according to the reason for the operation.

None of these timeframes is a target to hit. They are typical shapes, and yours will be your own.

What people often get wrong about liver resection preparation

Some beliefs travel from waiting room to waiting room. A few deserve correcting.

“I should stop all my tablets to be safe.” Stopping a blood pressure tablet, a heart rhythm medicine or a steroid without guidance can cause more harm than the surgery. Only the medicines on your written schedule change, and only on the dates given.

“Blood thinners are always stopped a week before.” There is no universal number. Warfarin, direct oral anticoagulants and antiplatelets clear at different rates, kidney function changes those rates, and some people are bridged or continue aspirin. The plan is individual.

“Herbal supplements don’t count.” Fish oil, ginkgo, garlic capsules and high-dose vitamin E can affect bleeding; St John’s wort interacts with anesthetic and pain medicines. Anesthesiologists ask about them for a reason.

“Losing weight before surgery is always good.” For most HPB patients the opposite is true. Unintended weight loss usually means muscle loss and poor absorption, and it is associated with slower healing. Protein and enzyme support matter more than the number on the scale.

“Liver regrowth means any amount can be removed.” Regeneration is real, but a damaged liver regenerates poorly, and the remnant has to function from the first day. Volumetry and function tests set the limit.

“If I need insulin after pancreas surgery, something went wrong.” Diabetes after removing part of the pancreas is a recognized consequence, listed by Mayo Clinic among expected risks. It reflects the organ’s role, not an error.

“I’ll be pain-free thanks to the epidural.” The goal is controlled pain that allows movement, not no pain. Knowing that in advance makes the first days less frightening.

Questions to ask your care team before liver or pancreas surgery

A pre-assessment appointment moves quickly. Writing questions down beforehand, and bringing someone to take notes, changes how much you leave with. These are the ones that tend to matter most.

• Exactly which operation is planned, and what will be removed and reconnected? Can you draw it?
• Is the approach open or keyhole, and what would make you change that decision during surgery?
• Which scans do I still need, and do any of them require me to hold a medicine beforehand?
• Can I have a single written list of every medicine, the last day to take each, and the day to restart?
• For my blood thinner: why this timing, will I need a bridging injection, and who do I call if I am unsure?
• For my diabetes: what is my target range before surgery, what happens to my insulin or tablets on the day, and who manages my sugars in hospital?
• What are the specific complications you watch for after this operation, and how would I recognize them at home?
• What is the expected hospital stay for someone in my situation, and what would extend it?
• Will I need pancreatic enzyme supplements or new diabetes treatment afterward, and who follows that up?
• What pain relief plan do you use, and how do I raise it if it is not working?
• Is there anything I can do in the next few weeks, with exercise, diet, smoking or alcohol, that would change my risk?
• What are the alternatives to surgery in my case, and what does waiting involve?
• Who is my named point of contact between now and the operation?

If an answer is uncertain, a good team will say so. “We won’t know until we’re in there” is sometimes the truth, and hearing it beforehand is better than hearing it afterward. Every one of these decisions rests with the treating team; the questions are there to make sure you understand the reasoning behind them.

When to call your doctor

Before and after HPB surgery there are moments when waiting for the next appointment is the wrong choice. Contact your surgical team or seek urgent care the same day if any of the following occur.

In the weeks before surgery:

• New or deepening yellowing of the skin or whites of the eyes, dark urine or pale stools, especially with fever or shivering. This can mean an infected, blocked bile duct.
• A fever, persistent vomiting or a new chest infection close to your admission date.
• Any bleeding that does not stop, black stools or vomiting blood while on a blood thinner.
• Blood sugar readings that are persistently very high or that keep dropping low despite following your plan, or symptoms of ketoacidosis such as deep rapid breathing, abdominal pain and drowsiness, particularly if you take an SGLT2 inhibitor.
• Sudden pain, swelling or redness in one leg, or breathlessness and chest pain, which can signal a clot while anticoagulation is paused.

After you go home:

• Fever, chills, or a racing heartbeat.
• Abdominal pain that is worsening rather than easing, or pain with a rigid, swollen abdomen.
• Wound redness spreading outward, pus, or a wound that opens.
• Drain fluid that changes to cloudy, foul-smelling or blood-stained, or a drain that stops draining suddenly.
• Vomiting that prevents you keeping fluids down, or being unable to pass urine.
• Confusion, extreme drowsiness or new jaundice, which after liver surgery can indicate the remaining liver is struggling.
• Calf pain, breathlessness or chest pain, as above.

Call emergency services for collapse, severe breathing difficulty, heavy bleeding or chest pain. For everything else, the surgical team’s contact number, given at discharge, is the right first call, and no question is too small. Being seen for something that turns out to be nothing is the system working as intended.

Frequently asked questions

Is pancreatic surgery a major surgery?

Yes. A Whipple procedure removes the head of the pancreas, part of the small intestine, the gallbladder and part of the bile duct, then reconnects the digestive tract; Mayo Clinic describes it as typically taking 4 to 12 hours. The operation works around major blood vessels and creates joins that must heal in the presence of digestive enzymes, which is why preparation, monitoring and recovery are more intensive than for most abdominal operations.

How painful is a liver resection?

Liver resection causes significant soreness in the upper abdomen, particularly with breathing, coughing and moving, and this is expected. Anesthesiologists plan layered pain relief in advance, often combining an epidural or nerve block, a patient-controlled pump and regular non-opioid medicines. The aim is pain controlled well enough to walk and breathe deeply, not the absence of pain. Tell the team early if the plan is not letting you move.

What should I do to prepare for liver resection surgery?

Focus on four things: daily aerobic and leg-strength exercise, protein-rich nutrition to reverse any weight loss, stopping smoking and reducing alcohol, and following a written medicine schedule for blood thinners, diabetes drugs and supplements. Attend every scan and pre-assessment appointment, bring all medicines in original packaging, and arrange support at home for the first weeks. Your surgical team confirms which steps apply to you.

How do I prepare for Whipple surgery if I have diabetes?

Your diabetes team and anesthesiologist will set a target blood sugar range and give specific instructions for each medicine. Metformin is commonly held on the day, sulfonylureas are held while fasting, SGLT2 inhibitors are usually paused beforehand, and insulin is continued with adjustments, often switched to an intravenous infusion in hospital. Bring your meter, and ask who to call if readings run high or low before admission.

Why do I have to stop blood thinners before liver or pancreas surgery?

These operations involve large vessels and, in the liver’s case, an organ that produces clotting proteins, so surgeons want clotting near normal to limit bleeding. Because stopping anticoagulation also raises clot risk, the plan balances the two: each medicine is paused according to how long it stays active, and some people receive a short-acting injectable bridge or continue aspirin. Never change a blood thinner without written instructions from your team.

Which scans are needed before pancreas or liver surgery?

Most people have a contrast-enhanced CT scan timed to show arteries and veins, and many also have MRI with MRCP to map the bile and pancreatic ducts. Endoscopic ultrasound may be used to image the pancreas closely or take a tissue sample, PET-CT to look for disease elsewhere, and liver volumetry to measure how much liver would remain after resection. Your team decides which combination is needed.

Why is metformin stopped before a CT scan with contrast?

Both iodine contrast and metformin are handled by the kidneys. If contrast temporarily reduces kidney function, metformin can build up and, rarely, contribute to lactic acidosis. Radiology departments therefore often ask people with reduced kidney function to hold metformin around the scan and restart after a reassuring kidney test. People with normal kidney function may not need to pause; the radiology and diabetes teams will tell you.

How long is the hospital stay after a Whipple procedure?

Mayo Clinic describes a typical stay of about a week after a Whipple procedure, with some people needing longer depending on how recovery progresses. The first night is often spent in a high-dependency area for monitoring. Length of stay varies with the extent of surgery, complications such as delayed stomach emptying or a pancreatic leak, and how quickly eating and walking resume. Treat any figure as a typical range, not a promise.

Will I get diabetes after pancreas surgery?

Some people do. The pancreas produces insulin, and removing part of it, or the whole organ, reduces that supply; Mayo Clinic lists new or worsened diabetes among recognized Whipple risks. Whether it happens depends on how much pancreas remains and how healthy it is. Blood sugar is monitored closely in hospital and reviewed at follow-up, and a diabetes team will advise on any treatment needed afterward.

Can I take herbal supplements before HPB surgery?

Tell your anesthesiologist about every supplement and let them decide. Fish oil, ginkgo, garlic capsules and high-dose vitamin E can affect bleeding, and St John’s wort interacts with anesthetic and pain medicines. Many teams ask for supplements to be paused before surgery, but the decision and timing come from them. Bring the bottles to your pre-assessment appointment so nothing is missed.

References

• NHS – Pancreatic cancer: Treatment
• MedlinePlus – Blood Thinners
• NHS – Having an operation (surgery): Preparation

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.