Preparing for Robotic Hernia Surgery: Blood Thinners, Fasting and Why Smoking Matters

The letter arrives with a time, a place and a sentence that stops most people mid-sip of coffee: nothing to eat after midnight. Somewhere in the same envelope is a line about aspirin, another about nicotine, and a phone number to call with questions. It is a lot of small instructions for a bulge in the groin that, on most days, only bothers you when you lift the grocery bags.

That gap between how minor a hernia feels and how thorough the preparation looks is where the confusion starts. Preparing for robotic hernia surgery is less about the robot and more about you: your blood, your stomach, your lungs and the medicines in your bathroom cabinet.

This explainer walks through what the surgical team is actually protecting against with each instruction, what the evidence supports, and where the honest answer is still a judgment call for your prescriber and surgeon.

How does robotic hernia repair actually work?

A hernia is a weak spot in the muscle wall that lets tissue, usually fat or a loop of bowel, push through where it should not. Repairing one means putting that tissue back, closing or covering the gap, and reinforcing the area so it stays closed.

Robotic repair is a form of laparoscopic surgery, which is keyhole surgery done through small cuts using a camera and long instruments. The difference is how the instruments are controlled. Instead of holding them directly, the surgeon sits at a console a few feet from the patient and moves hand controls that translate into finer movements of instruments held on robotic arms. The system does nothing on its own; every movement is the surgeon’s, and a bedside assistant remains at the table throughout.

For a groin hernia the operation typically involves three small incisions near the navel and lower abdomen. Carbon dioxide gas gently inflates the abdomen to create working space. The surgeon reduces the herniated tissue, then places a sheet of surgical mesh, a soft synthetic reinforcement, behind the muscle wall over the weak area. The gas is released, the small incisions are closed with dissolvable stitches or glue, and most people wake within an hour or two of the operation ending.

Two things follow from this. First, a general anesthetic is almost always required, because the muscles must be fully relaxed for the gas to create space. That is why fasting rules exist. Second, the mesh sits in a space where bleeding would be hard to see, which is why anticoagulation planning matters. The robot changes ergonomics for the surgeon; it does not change the physiology being managed on your behalf.

Who is robotic hernia repair usually for, and who is asked to wait?

Robotic repair is most often offered for inguinal hernias in the groin, for hernias on both sides at once, for recurrences after a previous open repair, and for some incisional and ventral hernias of the abdominal wall. Surgeons also tend to favor a keyhole approach, robotic or conventional laparoscopic, when the person has had earlier groin surgery on one side, because the mesh can be placed from behind without cutting through scar tissue.

Not everyone is a straightforward candidate. People who cannot safely have a general anesthetic because of severe heart or lung disease may be steered toward an open repair under local or regional anesthesia. Extensive previous abdominal surgery can leave adhesions, internal scar tissue that glues organs together, which can make creating the gas space unsafe. A very large hernia that has been down for years and no longer goes back in may also need an open approach.

Being asked to wait is different from being turned down. Surgeons commonly postpone elective repair when someone is actively smoking, when blood sugar control is poor, when body weight makes anesthesia and wound healing riskier, or when a recent chest infection has not cleared. The Mayo Clinic notes that small hernias causing no symptoms may simply be watched, a strategy called watchful waiting, with surgery reserved for when symptoms develop.

Waiting is not passive. Each of the delay reasons above is something the person can influence, and the improvement is measurable: cleaner lungs, steadier glucose, better tissue oxygen delivery. A postponed date can be the most useful appointment you never keep, provided the hernia is not incarcerated or causing escalating pain, which changes the calculus entirely and is covered in the red-flag section below.

Preparing for robotic hernia surgery starts at the pre-assessment visit

Pre-assessment, sometimes called pre-operative assessment, is the appointment where a nurse or anesthesia clinician reviews your health before the operation is confirmed. The NHS describes it as the point where medicines are listed, tests are ordered and the anesthetic plan is discussed. It is also the single best moment to raise anything you are unsure about, because decisions made here shape every instruction you receive afterward.

Bring a complete list of what you take, including inhalers, patches, eye drops, over-the-counter painkillers and any herbal or dietary supplement. People routinely forget the fish oil or the turmeric capsules, and both can matter for bleeding. Bring the name of whoever prescribes any blood thinner, because the surgical team will usually contact that clinician rather than change the plan themselves.

Expect questions about snoring and daytime sleepiness, which screen for obstructive sleep apnea, and about loose teeth, crowns or difficulty opening the mouth, which matter for the breathing tube. Blood tests, an ECG and occasionally a chest X-ray are ordered based on age and history, not routinely for everyone.

You may also be asked to sign consent at this visit or later on the day. Consent is a conversation, not a signature. The surgeon should cover the alternatives, including open repair and, for symptom-free hernias, watchful waiting, and should explain risks such as bleeding, infection, chronic groin pain, injury to nearby structures, seroma (a pocket of fluid where the hernia was), and recurrence. If any of that is rushed or unclear, ask for it to be repeated. Nothing about the operation depends on you understanding the robot; a great deal depends on you understanding the plan.

Do I need to stop blood thinners before hernia surgery?

The honest answer is that some people do, some people do not, and the decision belongs to the clinician who prescribes the medicine, working with the surgical team. What you can do is understand why the question is asked and why the answer differs from person to person.

Blood thinners fall into two broad classes. Anticoagulants slow the clotting cascade itself; this group includes warfarin, a vitamin K antagonist whose effect fades over days, and the direct oral anticoagulants, whose effect fades over hours to a couple of days depending on kidney function. Antiplatelet medicines, such as aspirin and clopidogrel, make platelets less sticky; because platelets live for about a week, their effect wears off gradually as new ones are made.

The surgical concern is bleeding into the space behind the abdominal wall where the mesh sits, which can form a hematoma, a collection of blood, and can be difficult to detect early. The medical concern pulls the other way: the medicine was prescribed for a reason, often atrial fibrillation, a recent stent, a mechanical heart valve or a previous clot. Stopping it carries its own risk of stroke or clot.

So the prescriber weighs the reason you take it, how recently the underlying event happened, and the bleeding risk of the specific operation. Some people continue aspirin throughout. Some pause an anticoagulant for a set number of days and restart soon after. A few are given a temporary injectable anticoagulant as a bridge. The one universal rule is not to stop, restart or adjust anything on your own initiative. MedlinePlus advises telling the surgeon about every blood-thinning medicine and following the specific instruction you are given, and that instruction should be written down, not remembered from a phone call.

Fasting before hernia surgery: why the empty stomach rule exists

The rule feels arbitrary until you know what it prevents. During a general anesthetic the muscles that normally seal the top of the stomach relax, and the cough reflex that protects the airway is switched off. If the stomach holds food or acidic liquid, it can travel upward and be inhaled into the lungs. This is called aspiration, and it can cause a chemical pneumonia serious enough to need intensive care. An empty stomach removes the hazard almost entirely.

Modern fasting guidance is more generous than the old midnight cutoff. NHS guidance on having an operation describes a typical pattern of no food for about six hours before the anesthetic and clear fluids, such as water, allowed until about two hours before. Milk counts as food because it curdles in the stomach. Chewing gum and boiled sweets are usually included in the food category too, because chewing stimulates acid and saliva.

Your written instructions override anything general. Some units allow a specific carbohydrate drink up to two hours before, some ask for a longer fast if you have diabetes with slow stomach emptying, and some adjust the plan for people taking medicines that slow digestion. If you are unsure whether something counts as a clear fluid, the answer is to phone and ask rather than guess.

Fasting too long has downsides of its own: dehydration, headache, nausea after waking, and a rougher start to recovery. That is why anesthesia teams now actively encourage drinking water up to the permitted time. Arriving thirsty, dizzy and slightly resentful is not a mark of good preparation. Arriving well hydrated within the rules is.

Why smoking matters so much before hernia surgery

Of every modifiable factor in this article, smoking has the strongest evidence behind it and the least wiggle room. Surgeons ask about it not as a lifestyle lecture but because tobacco changes the biology of healing in ways that show up in wound infections, breathing problems and hernia recurrence.

The mechanisms are concrete. Nicotine constricts small blood vessels, and carbon monoxide occupies hemoglobin that should be carrying oxygen. Together they starve the healing wound edge of the oxygen it needs to build new tissue. Smoking also impairs the function of white cells that fight bacteria, so the same bacterial load is more likely to become an infection. In the lungs, smoking thickens mucus and paralyzes the tiny hairs that clear it, which is why smokers cough more after anesthesia and are at higher risk of chest infection. There is also a longer-term thread: tobacco weakens collagen, the protein scaffolding of connective tissue, which is one reason smokers develop hernias more often and are more prone to recurrence after repair.

The MedlinePlus patient guidance on smoking and surgery advises stopping as early as possible and ideally at least four to six weeks beforehand, noting that lung function and wound healing both improve with more smoke-free time. Even a shorter break helps carbon monoxide clear, so the day you find out about the operation is the right day to stop, whatever the countdown.

Vaping is not a neutral swap. Nicotine from any source causes the same vessel constriction, and most anesthesia teams ask about e-cigarettes alongside tobacco. Nicotine replacement products are a different conversation and one to have openly with the pre-assessment team, who can advise on what is acceptable in your situation.

What about other medicines, supplements and diabetes medicines?

Blood thinners get the headlines, but several other groups need a plan, and the general rule is the same: continue everything prescribed unless the surgical or prescribing team tells you specifically to pause it.

Diabetes medicines are the most common source of confusion. Fasting lowers blood sugar, so some oral diabetes medicines and insulin regimens are adjusted on the morning of surgery to avoid hypoglycemia. The instruction will come from the pre-assessment team or your diabetes clinician, and it will be tailored to your medicine class and your usual pattern; there is no safe way to improvise it. Newer injectable medicines that slow stomach emptying may prompt a longer fasting window or a pause before surgery, again on individual advice.

Non-steroidal anti-inflammatory painkillers such as ibuprofen have a mild antiplatelet effect, and some teams ask for a short pause. Herbal and dietary supplements deserve a mention because people rarely think of them as medicines. Fish oil, high-dose vitamin E, ginkgo, garlic supplements and some traditional preparations can increase bleeding tendency, and St John’s wort can interact with anesthetic drugs. The NIH Office of Dietary Supplements advises telling your health care provider about any supplement before surgery. Bring the actual bottles if the names are unclear.

Blood pressure medicines, thyroid replacement, inhalers, antidepressants and anti-seizure medicines are usually continued, often with a small sip of water even during the fasting window. Steroid medicines taken long term need particular care because the body may not produce its own stress hormone response; this is exactly the kind of detail to volunteer rather than wait to be asked. A missed steroid dose and a forgotten fish oil capsule are very different problems, but both start with the same fix: a complete, honest list.

Prehabilitation: getting your body ready in the weeks before

Prehabilitation is the practice of improving fitness, nutrition and health in the weeks before an operation so the body arrives with more reserve. It is a modest idea with a growing evidence base, and it sits comfortably alongside the specific rules already covered.

Movement comes first. Someone who can walk briskly for twenty to thirty minutes a day is more likely to mobilize quickly afterward, and mobilizing early is one of the strongest protections against chest infection and clots in the legs. If a hernia limits activity, walking on flat ground is usually fine, while heavy lifting and straining should be avoided until the repair is done.

Nutrition matters for wound healing. Adequate protein at each meal gives the body the amino acids it needs to lay down collagen at the repair site. People who have lost weight unintentionally or who eat very little should mention it, because the team may want a dietitian involved before rather than after surgery.

For people carrying extra weight, surgeons sometimes ask for a modest reduction before elective ventral hernia repair because intra-abdominal pressure and wound complications both track with abdominal girth. This is a clinical conversation about risk, not a judgment, and the goal is set jointly. Crash dieting in the final week is counterproductive; it depletes glycogen stores and can raise surgical stress.

Blood sugar deserves a target too. Higher glucose around the time of surgery impairs white cell function and raises infection risk, which is why teams check long-term control and may delay elective surgery if it is markedly off. Sorting a chronic cough, treating a dental abscess and getting a decent night’s sleep in the run-up are unglamorous and effective. None of this is about becoming an athlete; it is about arriving with a body that has been given every fair chance.

Preparing for robotic hernia surgery: your timeline at a glance

Individual instructions always win, but most preparation follows a recognizable shape. The table below gathers the typical timelines discussed throughout this article, with the source for each. Treat it as a map of the conversation, not a substitute for the letter from your own team.

When	What usually happens	Why it matters
As soon as surgery is planned	Stop smoking and vaping; list all medicines and supplements	Wound healing and lung function improve with every smoke-free week (MedlinePlus)
4–6 weeks before	Pre-assessment visit; blood thinner plan agreed with prescriber; fitness and nutrition work	Time to adjust medicines safely and build reserve (NHS, MedlinePlus)
Days before	Any agreed pause of anticoagulants or supplements begins on the date given	Different drug classes clear at different speeds; timing is individual
About 6 hours before	Last food, including milk and gum	Reduces aspiration risk under anesthesia (NHS)
About 2 hours before	Last clear fluids such as water	Hydration without stomach residue (NHS)
Morning of surgery	Take permitted medicines with a sip of water; shower; no jewelry, nail polish or lotions	Skin cleanliness and monitoring accuracy
Same day, after surgery	Most groin repairs go home once eating, walking and passing urine	Early mobility lowers clot and chest risks (NHS)

Two practical items sit outside the table. Arrange a responsible adult to drive you home and stay the first night, because anesthesia impairs judgment and reaction time for a day even when you feel clear-headed. Prepare the house in advance: loose clothing, easy meals, and a place to sleep where you will not have to climb stairs frequently on the first evening. Small logistics prevent a good operation from turning into a hard night.

How painful is robotic hernia repair?

People want a number, and the truthful answer is a range. Keyhole hernia repair, including robotic, generally causes less early pain than open repair because the muscle layers are not cut through to reach the defect. The Mayo Clinic notes that laparoscopic approaches may involve less discomfort and scarring, and the same principle applies to robotic technique. That is a statement about averages, not a promise about your Tuesday.

Three kinds of discomfort are typical. The first is soreness at the small incisions, sharpest when you cough, laugh or get out of a chair; it tends to peak in the first day or two and then settle. The second is a deep, bruised ache in the groin or lower abdomen where the mesh sits and where tissue was dissected. The third surprises people: pain in the shoulder or under the ribs, caused by carbon dioxide gas irritating the diaphragm. It is harmless, usually fades within a couple of days, and walking helps disperse it.

Pain control is usually a combination approach: local anesthetic injected at the incision sites during the operation, regular non-opioid painkillers, and a short supply of something stronger for breakthrough pain if needed. Your team will explain their specific plan. Taking regular painkillers on schedule for the first couple of days, rather than waiting until pain is severe, generally keeps the peaks lower.

Chronic groin pain lasting beyond three months is a recognized complication of hernia repair and is the risk surgeons most often discuss at consent. The NHS lists it among the possible complications of inguinal repair. Keyhole approaches appear to carry a lower risk of long-term pain than open repair, though the evidence is not uniform across studies. If pain is escalating rather than fading after the first week, that is a reason to call, not to push through.

Robotic inguinal hernia repair recovery: the first days and weeks

The hardest day is usually the second one. On the first day the local anesthetic and the operating-room medicines are still working; by the morning after, they have worn off, the gas ache is at its peak, and getting upright from a bed reminds every stitch it exists. Knowing this in advance changes how it feels. Most people describe a clear turn for the better by day three or four.

Walking begins the day of surgery, in short loops around the house, and increases daily. NHS guidance for inguinal hernia repair describes most people returning to light activities within one to two weeks and advises avoiding strenuous exercise and heavy lifting for around four to six weeks while the repair consolidates. Return to desk work often falls inside the first one to two weeks; physical jobs take longer and depend on the surgeon’s assessment.

Sleeping on your side is generally allowed as soon as it is comfortable; the mesh is not dislodged by body position. In practice most people spend the first two or three nights on their back with a pillow under the knees, because rolling pulls on the incisions, then drift back to their usual side with a pillow hugged against the abdomen for support.

Driving is permitted once you can perform an emergency stop without hesitation and are no longer taking sedating painkillers, which the NHS suggests is often around one to two weeks; check your insurer’s terms too. Bowels can be sluggish for a few days from anesthesia and painkillers, so fluids, fiber and walking matter, and the team may suggest a gentle laxative. Some swelling or a firm, tender lump where the hernia was is common and usually a seroma that resolves over weeks; it is worth having checked rather than assumed.

What people often get wrong about preparing for hernia surgery

Myth: stopping blood thinners a week early is the safe choice. Stopping earlier than instructed can raise the risk of stroke or clot without meaningfully lowering surgical bleeding. The date matters in both directions, which is why it is set by the prescriber.

Myth: a drink of water in the morning will cancel the operation. Clear fluids up to about two hours before are typically encouraged, not forbidden. The problem is food, milk and gum inside the window, and any deviation should simply be reported honestly at check-in rather than hidden.

Myth: quitting smoking right before surgery makes things worse. Older observations suggested a short-term rise in cough after quitting. Current guidance from MedlinePlus and major anesthesia bodies is unambiguous: stopping at any point before surgery is better than continuing, and longer is better still.

Myth: the robot does the operation. The surgeon controls every movement from a console. The system offers steadier instruments and a magnified view; it makes no decisions.

Myth: keyhole means no real recovery. Smaller incisions reduce early pain, but the internal repair is the same size as an open one. The four-to-six-week lifting restriction described by the NHS exists because tissue takes that long to grow into the mesh.

Myth: mesh is inherently dangerous. Mesh has been shown to lower recurrence compared with stitch-only repair for most adult hernias, which is why it is standard. Complications such as chronic pain and infection are real and should be discussed, but they are not the norm.

What experienced patients wish they had known: that day two would be worse than day one, that shoulder pain was from gas and not from something going wrong, that constipation would be the most annoying part, and that a pillow pressed against the abdomen before coughing changes everything.

Questions to ask your care team

A good consultation leaves you knowing not just what will happen but why. These questions are phrased for a surgeon, an anesthesia clinician and a prescriber; not all will apply, and none should feel awkward to ask.

• Which approach are you recommending for my hernia, robotic, conventional laparoscopic or open, and what makes it the right fit for me specifically?
• If my hernia is causing few symptoms, is watchful waiting a reasonable option, and what would prompt us to move to surgery?
• Who is coordinating my blood thinner plan, and can I have the stop and restart instructions in writing with the dates?
• Which of my regular medicines should I take on the morning of surgery, and which should I hold?
• What are my exact fasting times for food and for clear fluids, and does anything about my health change the standard window?
• Do I need a longer smoke-free period before you would proceed, and what support for quitting is available through the hospital?
• What type of mesh will be used, and what are the specific risks of chronic pain, infection and recurrence for someone with my history?
• What is the plan for pain control at home, and how will I know if pain is normal or a warning?
• When can I expect to walk, shower, drive, return to my particular job and resume exercise or sexual activity?
• What signs should make me call, and which number do I use at night or on a weekend?
• Who will see me at follow-up, and what would make you want to see me sooner?

Write the answers down or bring someone who will. The details that seem obvious in a quiet consultation room become slippery on the evening before, when anxiety fills the space that memory used to occupy.

When to call your doctor

Most recoveries after robotic hernia repair are uneventful, and most concerns can wait for the daytime clinic line. A short list of signs should not wait, before or after the operation.

Before surgery, seek urgent care if the hernia becomes suddenly painful, hard and tender, cannot be pushed back in when it previously could, or is accompanied by vomiting, a swollen abdomen or inability to pass gas or stool. These can indicate incarceration or strangulation, in which trapped tissue loses its blood supply; the Mayo Clinic and MedlinePlus both describe this as an emergency. Skin over the bulge turning red, purple or dark is a similar warning.

After surgery, call the same day for a fever, spreading redness or warmth around an incision, pus or a persistent leak of fluid from a wound, pain that is getting worse after the first few days rather than better, a swelling in the groin or scrotum that is rapidly enlarging, inability to pass urine within about eight hours of getting home, or persistent vomiting.

Seek emergency care immediately for chest pain, sudden breathlessness, coughing blood, a painful swollen calf, fainting, or a rigid, severely painful abdomen. Chest and calf symptoms can indicate a blood clot in the lung or leg, a rare but serious complication of any operation, and are more likely in people who have paused an anticoagulant.

If you take a blood thinner and are unsure whether to restart it, or you have missed a dose of a critical medicine, phone the prescriber or the surgical team rather than deciding alone. Nobody on a surgical team minds a call that turns out to be nothing. Every decision about your medicines, your operation and your recovery rests with the clinicians who know your history; this article can help you ask better questions, not replace their answers.

Frequently asked questions

How painful is robotic hernia repair compared with open surgery?

Keyhole approaches, including robotic, generally cause less early pain than open repair because the muscle layers are not cut through to reach the hernia. Expect soreness at the small incisions, a deep bruised ache in the groin and possibly shoulder pain from the gas used during surgery. Pain usually peaks around day two and eases steadily. Regular non-opioid painkillers taken on schedule keep the peaks lower; your team will set the plan.

Do I have to stop blood thinners before hernia surgery?

Not necessarily; the decision depends on why you take the medicine and which class it belongs to. Some people continue aspirin throughout, others pause an anticoagulant for a set number of days, and a few receive a temporary bridging injection. The prescriber weighs your clot risk against the surgical bleeding risk. Never stop or restart on your own; ask for the instructions in writing with exact dates.

What are the fasting rules before hernia surgery?

Typical guidance, as described by the NHS, is no food for about six hours before the anesthetic and clear fluids such as water until about two hours before. Milk, gum and sweets count as food. Your own instructions may differ if you have diabetes, take medicines that slow stomach emptying, or are scheduled later in the day, so follow the written times you are given and phone if anything is unclear.

Why does the surgeon care so much about smoking before hernia surgery?

Because tobacco measurably raises the risk of wound infection, chest infection and hernia recurrence. Nicotine narrows small blood vessels and carbon monoxide displaces oxygen, starving the healing wound. Smoking also weakens collagen, the tissue scaffolding a repair depends on. MedlinePlus advises quitting at least four to six weeks beforehand, and any smoke-free time helps. Vaping delivers nicotine too, so it is included in the same conversation.

What is the hardest day after hernia surgery?

For most people it is the second day, when the local anesthetic and operating-room medicines have worn off, the gas ache is at its peak and getting out of bed pulls on every incision. Knowing this in advance makes it easier to ride out. Most people notice a clear improvement by day three or four, and pain that keeps worsening after the first week is a reason to call rather than something to expect.

Can I sleep on my side after robotic inguinal hernia surgery?

Yes, as soon as it is comfortable; body position does not dislodge the mesh. In practice most people spend the first two or three nights on their back with a pillow under the knees because rolling pulls on the incisions. When you return to side sleeping, hugging a pillow against the abdomen supports the area and makes turning over less uncomfortable.

What do people wish they knew before hernia surgery?

Common answers include that shoulder pain is from gas rather than a problem with the repair, that constipation from anesthesia and painkillers is often the most irritating part, that a pillow pressed to the abdomen before coughing helps enormously, and that keyhole surgery still needs a four-to-six-week lifting restriction. Many also wish they had asked for their medicine instructions in writing instead of relying on memory.

How long is robotic inguinal hernia repair recovery?

NHS guidance describes most people returning to light activities within one to two weeks and avoiding strenuous exercise and heavy lifting for around four to six weeks while tissue grows into the mesh. Desk work often resumes within the first two weeks; physically demanding jobs take longer and depend on the surgeon’s assessment. Driving is usually allowed once you can perform an emergency stop and are off sedating painkillers.

Should I stop supplements before hernia surgery?

Tell the pre-assessment team about every supplement and let them decide. Fish oil, high-dose vitamin E, ginkgo and garlic supplements can increase bleeding tendency, and St John’s wort can interact with anesthetic drugs. The NIH Office of Dietary Supplements advises disclosing all supplements before surgery. Bring the bottles if names are unclear; a forgotten capsule is more common than a forgotten prescription.

What happens on the morning of robotic hernia surgery?

You shower, avoid lotions, nail polish and jewelry, and take only the medicines your team told you to take, usually with a small sip of water. At check-in a nurse confirms your fasting times and medicine list, the anesthesia clinician reviews your airway and consent is finalized. The operation itself typically takes an hour or two, and most groin repairs go home the same day once you are eating, walking and passing urine.

References

• NHS: Inguinal hernia repair
• NHS: Having an operation (surgery), preparation
• MedlinePlus: Inguinal hernia repair
• MedlinePlus: Smoking and surgery

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.