If you are considering robotic prostate surgery, you may be reassured that blood loss is generally lower than with open prostate surgery. Studies commonly report around 100–400 mL, although your blood loss can vary depending on your anatomy, prostate size and the complexity of the operation.
You are also unlikely to need a blood transfusion after robotic prostatectomy. UK BAUS data recorded a transfusion rate of 0.2% compared with 1.5% after open surgery, although some bleeding can still occur and your individual risk will depend on your circumstances.
What Does Estimated Blood Loss Mean?
Estimated blood loss, or EBL, is the approximate amount of blood you lose during surgery, usually measured in millilitres. Studies may report a mean or median, so the figures can vary depending on how the results are calculated.
You should also remember that EBL is only an estimate, not an exact measurement. What matters most is whether your blood loss affects your haemoglobin, health or need for treatment, which is why studies also report transfusion rates separately.
What Do Published Robotic Prostatectomy Blood-Loss Figures Show?
When you look at published studies, you can see that blood loss during robotic prostatectomy varies, but is generally lower than with open surgery. You may see robotic procedures reporting around 100–400 mL, compared with about 500 mL to more than 1,300 mL for open surgery, although your actual blood loss will vary.
| Study | Robotic prostatectomy blood loss | Open prostatectomy blood loss |
| Yaxley randomised trial | 444 mL | 1,338 mL |
| Farnham study | 191 mL | 664 mL |
| Wood study | 151 mL | 707 mL |
| Ficarra study | 300 mL | 500 mL |
| Health Professionals Follow-up Study | 207 mL | 852 mL |
In the randomised Yaxley trial, mean estimated blood loss was approximately 444 mL with robotic surgery compared with 1,338 mL with open surgery. Contemporary robotic prostatectomy series have also reported relatively low estimated blood loss, although results vary between centres, techniques and individual patients.
What Is the UK Blood Transfusion Rate After Robotic Prostatectomy?
UK data show that you are unlikely to need a blood transfusion after robotic prostatectomy. Between 2016 and 2019, the British Association of Urological Surgeons recorded a known transfusion rate of 0.2% after robotic prostatectomy, with 50 recorded transfusions among 29,116 procedures for which transfusion status was known.
| BAUS 2016–2019 surgical approach | Known transfusion rate |
| Robotic prostatectomy | 0.2% |
| Laparoscopic prostatectomy | 0.3% |
| Open prostatectomy | 1.5% |
In this UK dataset, around 2 in 1,000 robotic prostatectomy patients needed a transfusion, compared with about 15 in 1,000 after open surgery. You should note that these BAUS data cover 2016–2019, so the 0.2% rate is a useful UK benchmark rather than a current 2026 national figure.
How Does Robotic Blood Loss Compare With Open Prostate Surgery?
If you are comparing robotic and open prostate surgery, you can generally expect less blood loss with the robotic approach. Studies have reported lower average blood loss with robotic surgery, although the exact amount varies between patients.
You are also less likely to need a blood transfusion with robotic surgery. If you are discussing your options with your surgeon, you can ask how your expected blood loss and transfusion risk compare with open surgery.
Have UK Robotic Transfusion Rates Changed Over Time?
UK registry data show lower reported robotic transfusion rates in more recent BAUS datasets, although the figures come from different reporting periods and should be compared cautiously. The reported robotic transfusion rate fell from 2.9% in 2014 to around 0.17% in 2019, although you should remember that these figures come from different datasets and time periods.
| BAUS reporting year | Recorded robotic transfusion rate |
| 2014 England data | 2.9% |
| 2016–2019 combined | 0.2% |
| 2019 alone | 0.17% |
You should not assume that robotic technology alone caused the reduction, as surgeon experience, patient selection and improved perioperative care may also have contributed. However, contemporary UK registry data show that blood transfusion became uncommon during robotic prostatectomy.
What Does the Most Recent Comparative Evidence Show?
Recent evidence continues to show less blood loss with robotic prostatectomy. A 2026 meta-analysis of 27 prospective or randomised studies involving 38,530 patients found a pooled mean blood-loss difference of approximately 577 mL in favour of robotic surgery, while the pooled odds of transfusion were around 73% lower with robotic prostatectomy.
| 2026 meta-analysis outcome | Robotic versus open result |
| Difference in blood loss | About 577 mL less with robotic surgery |
| Transfusion odds ratio | 0.27 |
| Difference in hospital stay | 1.44 days shorter with robotic surgery |
| Postoperative complication odds ratio | 0.59 |
These results are combined study findings, so an odds ratio of 0.27 does not mean your transfusion risk is 27%. Your actual risk depends on factors such as the population studied, and UK data suggest that your absolute transfusion risk after robotic prostatectomy can be well below 1%.
Research Insight
A 2026 systematic review and meta-analysis of 27 prospective or randomised studies involving 38,530 patients found significantly lower blood loss and lower odds of transfusion with robot-assisted compared with open radical prostatectomy. The pooled difference in blood loss was approximately 577 mL, while the transfusion odds ratio was 0.27.
How Does Robotic Surgery Compare With Conventional Laparoscopic Surgery?
If you compare robotic surgery with conventional laparoscopic prostatectomy, the difference in blood loss is generally smaller than with open surgery. You may still have lower blood loss with the robotic approach, although results can vary between studies.
You are also less likely to need a transfusion with robotic surgery in some studies. In the BAUS 2016–2019 national dataset, robotic procedures accounted for 86.2% of radical prostatectomies, compared with 7.3% performed laparoscopically.
Why Can Robotic Surgery Reduce Blood Loss?
If you are having robotic prostate surgery, the surgeon can use magnified 3D vision to see small blood vessels and tissue planes more clearly. You may also benefit from the precise movement of robotic instruments, which can help control bleeding during dissection.
Another important factor is careful control of the blood vessels around the prostate. You can therefore have less blood loss than with open surgery, although the exact amount still depends on your individual operation.
Does the Gas Pressure Used During Robotic Surgery Reduce Bleeding?
During robotic prostate surgery, carbon dioxide gas creates space inside your abdomen and can help compress small veins. This may reduce bleeding and give your surgeon a clearer view of the operating area.
You do not need unusually high gas pressure for low blood loss. Your surgical team balances the pressure with your safety, while careful surgical technique remains important for controlling bleeding.
Does Surgeon Experience Affect Blood Loss?
Surgeon experience can influence blood loss and other aspects of robotic prostate surgery. As surgeons gain experience with robotic procedures, they may become more efficient at identifying anatomy, controlling blood vessels and managing technically difficult parts of the operation.
- Greater Familiarity: More experience with robotic surgery can help your surgeon recognise important anatomical structures and tissue planes more efficiently.
- Bleeding Control: Experienced surgeons may be better able to identify and control blood vessels during different stages of the operation.
- Complex Cases Matter: Blood loss can still be higher when surgery is technically difficult because of your anatomy, prostate size or cancer characteristics.
- Results Need Context: A surgeon treating more complex cancers may report different blood-loss figures even when they have extensive robotic experience.
Surgeon experience is therefore one factor that can influence blood loss, but it should not be considered in isolation. Your anatomy, cancer characteristics and the complexity of your individual operation can also affect how much blood you lose.Top of FormBottom of Form
Does Prostate Size Affect How Much Blood You May Lose?
If you have a larger prostate, you may experience slightly more blood loss during robotic prostate surgery because the operation can require more dissection. Your surgeon can usually estimate prostate size before surgery using MRI or ultrasound.
You should not assume that a larger prostate makes robotic surgery unsafe. Robotic techniques can help control blood loss, although your prostate size will still be considered when your surgeon plans your operation.
Can Lymph-Node Dissection or Nerve-Sparing Affect Blood Loss?
If your robotic prostate surgery includes pelvic lymph-node dissection, the operation involves additional dissection and may take longer or become more complex. However, lymph-node removal does not necessarily mean that you will lose substantially more blood, and published robotic series have reported comparable estimated blood loss in some patients with and without lymph-node dissection.
Nerve-sparing changes the dissection around the prostate but has not been consistently shown to increase blood loss. Your overall blood loss is more likely to reflect several factors together, including your anatomy, prostate size, cancer characteristics, extent of surgery and surgical technique.
Do Blood-Thinning Medicines Increase the Risk?
If you take blood-thinning medicines such as warfarin, direct oral anticoagulants such as apixaban or rivaroxaban, or antiplatelet medicines such as aspirin, your bleeding risk and perioperative medicine plan may need individual assessment.
Your pre-operative haemoglobin can also affect your transfusion risk. If you already have anaemia, you may be more affected by blood loss, even when the amount lost during surgery is relatively small.
When Would You Actually Need a Blood Transfusion?
If you lose blood during robotic prostate surgery, you will not automatically need a transfusion. Your medical team considers your haemoglobin, blood pressure, symptoms and whether bleeding is continuing before deciding.
You may therefore lose a moderate amount of blood without needing donor blood if you remain stable. If a transfusion is needed, your team will assess the safest amount based on your condition and haemoglobin level.
Clinical Tip
A transfusion decision is not based on estimated blood loss alone. Your medical team considers your haemoglobin level, symptoms, cardiovascular status and whether you have ongoing bleeding before deciding whether donor blood is needed.
After robotic prostatectomy, some blood-staining of the urine can occur during recovery. However, persistent heavy bleeding, large blood clots or a catheter that stops draining should be reported promptly to your surgical team.
What Is Done to Reduce Blood Loss Before and During Surgery?
Before your robotic prostate surgery, your team will check your haemoglobin and look for anaemia that may need treatment. If you have iron-deficiency anaemia, your doctor may recommend iron treatment before surgery when there is enough time.
During your operation, your surgeon carefully controls blood vessels to limit bleeding. Tranexamic acid may also be used in line with current guidance and your individual clinical circumstances.
UK Guidance Note
NICE updated its blood transfusion guidance in February 2026 and recommends offering tranexamic acid to adults having surgery in an operating theatre when there is any risk of bleeding and the procedure breaches skin or mucous membranes. NICE also recommends iron supplementation before surgery for people with iron-deficiency anaemia.
What Should You Ask About Blood Loss Before Robotic Surgery?
Before your robotic prostate surgery, you can ask about the centre’s typical blood loss and transfusion rates. You should also ask whether these figures include patients with larger prostates or more complex cancers.
If you take medicines that affect clotting, tell your surgeon and anaesthetist well before surgery. You can also ask whether your haemoglobin is normal and what your individual risk of blood loss or transfusion may be.
Myth vs Fact
| Myth | Fact |
| Robotic prostate surgery causes no blood loss. | Blood loss still occurs, although studies generally report less blood loss than with open prostatectomy. |
| Everyone loses around the same amount of blood during robotic prostatectomy. | Blood loss varies according to the operation, anatomy, cancer characteristics and other individual factors. |
| Any blood loss means you will need a transfusion. | Most patients undergoing robotic prostatectomy do not require donor blood. |
| An estimated blood loss figure is an exact measurement. | EBL is an estimate and can vary according to how blood loss is measured during surgery. |
| Taking a blood thinner means robotic prostatectomy cannot be performed. | Anticoagulant and antiplatelet treatment requires individual planning; you should not stop these medicines without medical advice. |
| Robotic technology alone prevents bleeding. | Surgical technique, experience, anatomy and perioperative care also influence blood loss. |
Key Takeaways
- Robotic radical prostatectomy generally involves less blood loss than traditional open prostatectomy.
- BAUS 2016–2019 data recorded a 0.2% known transfusion rate after robotic prostatectomy.
- A 2026 meta-analysis also found lower blood loss and lower transfusion odds with robotic compared with open surgery.
- Your individual bleeding risk depends on your health, anatomy, surgical complexity and medicines.
- Blood loss does not automatically mean you will need a transfusion.
- Do not stop anticoagulant or antiplatelet medicines yourself before surgery.
Frequently Asked Questions
1. How much blood do you usually lose during robotic prostate surgery?
Published studies commonly report estimated blood loss of around 100–400 mL during robotic prostatectomy. Your actual blood loss can vary depending on factors such as your prostate size, anatomy, cancer complexity and whether lymph nodes are removed.
2. How often do you need a blood transfusion after robotic prostate surgery?
Blood transfusion is uncommon after robotic prostatectomy. UK BAUS data from 2016–2019 recorded a transfusion rate of approximately 0.2% following robotic prostatectomy, equivalent to around 2 patients in every 1,000.
3. Does robotic prostate surgery cause less blood loss than open surgery?
Yes. Studies generally show substantially lower blood loss with robotic prostatectomy than with traditional open surgery. In one randomised trial, average blood loss was approximately 444 mL with robotic surgery compared with 1,338 mL with open surgery.
4. Why does robotic prostate surgery usually involve less blood loss?
The robotic system gives your surgeon a magnified three-dimensional view of the pelvic anatomy and allows precise movement of the instruments. This can help your surgeon identify and control blood vessels, including the veins around the prostate, more accurately.
5. Does the size of your prostate affect blood loss during robotic surgery?
It can. A larger prostate may make the operation more technically demanding and can be associated with greater estimated blood loss. A larger prostate does not automatically rule out robotic surgery, but your surgeon will consider prostate size alongside your anatomy, cancer characteristics and other factors when planning the procedure.
6. Can lymph-node removal increase blood loss during robotic prostatectomy?
It may. Pelvic lymph-node dissection involves additional surgery and can increase the complexity of your operation, but it does not necessarily mean that you will lose substantially more blood. Your individual blood loss depends on several factors, including the extent of surgery, your anatomy and surgical technique.
7. Do blood-thinning medicines increase your risk of bleeding?
Medicines such as warfarin, apixaban, rivaroxaban and some antiplatelet medicines can affect bleeding risk, so your surgical and anaesthetic teams need to know if you take them. You should not stop or change these medicines yourself; your medical team will advise you on whether they need to be paused or adjusted before surgery.
8. Does blood loss during robotic prostate surgery always mean you need a transfusion?
No. The amount of blood you lose does not automatically determine whether you need a transfusion. Your doctors also consider your haemoglobin level, whether bleeding is continuing, your symptoms, blood pressure and overall health before deciding whether a transfusion is necessary.
9. Can your surgeon reduce the risk of blood loss during robotic prostate surgery?
Several measures can help reduce bleeding, including careful control of blood vessels, appropriate surgical technique and maintaining good visibility during the operation. Your team can also check and treat anaemia before surgery where appropriate, while medicines such as tranexamic acid may be considered according to current guidance and your individual circumstances.
10. What should you ask your surgeon about blood loss before robotic prostate surgery?
You can ask about the surgeon’s typical estimated blood loss and transfusion rate for robotic prostatectomy, particularly for operations similar to yours. It is also useful to ask whether your haemoglobin is normal, whether your prostate size or cancer stage could affect bleeding risk, and whether any of your medicines need to be adjusted before surgery.
Final Thoughts: Understanding Blood Loss During Robotic Prostate Surgery
If you are considering robotic prostate surgery, the available evidence suggests that blood loss is generally lower than with traditional open surgery, and needing a blood transfusion is uncommon. Your individual risk can still vary depending on factors such as prostate size, cancer complexity, lymph-node surgery, medicines that affect clotting and your general health.
If you are considering robotic prostate surgery in London and would like specialist advice, you can contact our team at Prostate Clinic London to discuss your treatment options and arrange a consultation tailored to your individual needs.
References:
- Suartz, C.V., Costa, M.S.S., Matalani, C.F.A. et al. (2026) ‘Comparative functional, perioperative and oncological outcomes of robot-assisted and open radical prostatectomy: a systematic review and meta-analysis’, International Urology and Nephrology, advance online publication. Available at: https://pubmed.ncbi.nlm.nih.gov/42230439/
- Yaxley, J.W., Coughlin, G.D., Chambers, S.K. et al. (2016) ‘Robot-assisted laparoscopic prostatectomy versus open radical retropubic prostatectomy: early outcomes from a randomised controlled phase 3 study’, The Lancet, 388(10049), pp. 1057–1066. Available at: https://pubmed.ncbi.nlm.nih.gov/27474375/
- Health Quality Ontario (2017) ‘Robotic surgical system for radical prostatectomy: A health technology assessment’, Ontario Health Technology Assessment Series, 17(11), pp. 1–172. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC5515322/
- Rinaldi, M., Di Lena, S., Amodeo, A., Porreca, A. and Crestani, A. (2025) ‘The role of robot-assisted radical prostatectomy in the management of prostate cancer and future perspectives’, Cancers, 17(19), article 3122. Available at: https://www.mdpi.com/2072-6694/17/19/3122
- Kubota, M., Matsuoka, T., Yamasaki, T. et al. (2021) ‘Effect of continued perioperative anticoagulant therapy on bleeding outcomes following robot-assisted radical prostatectomy’, Urology, 148, pp. 151–158. Available at: https://www.sciencedirect.com/science/article/pii/S0090429520314072
- Alemozaffar, M., Sanda, M., Yecies, D., Mucci, L.A., Stampfer, M.J. and Kenfield, S.A. (2015) ‘Benchmarks for operative outcomes of robotic and open radical prostatectomy: Results from the Health Professionals Follow-up Study’, European Urology, 67(3), pp. 432–438. Available at: https://www.sciencedirect.com/science/article/pii/S0302283814001183
- British Association of Urological Surgeons (BAUS) (no date) BAUS Radical Prostatectomy Registry 2016–2019: National Summary Results. Available at: https://www.baus.org.uk/_userfiles/pages/files/publications/audit/Prostatectomy%202016%20to%202019%20National%20figures.pdf
- British Association of Urological Surgeons (BAUS) (no date) Summary and timescale of the data: Radical prostatectomy 2014. Available at: https://www.baus.org.uk/patients/surgical_outcomes/radical_prostatectomy/timescales.aspx
- British Association of Urological Surgeons (BAUS) (2020) Analyses of radical prostatectomies performed between January 1st and December 31st 2019. Available at: https://www.baus.org.uk/_userfiles/pages/files/publications/audit/ProstatectomyFinalAnalyses2019.pdf
- National Institute for Health and Care Excellence (NICE) (2015, updated 2026) Blood transfusion. NICE guideline NG24. Available at: https://www.nice.org.uk/guidance/ng24