Operative animation, HoLEP

Holmium laser enucleation of the prostate

The plane between adenoma and surgical capsule is the operation: open it with grooves at 5 and 7 o'clock, take the median lobe, release the apex early, then peel each lateral lobe off the capsule and morcellate them in a full bladder.

The external sphincter at the apex is the structure the whole case is organised to protect, and the whole specimen goes to histology.

Advanced tier FRCS endourology, BPH / LUTS Interactive 3D
Schematic scene preview: Laser enucleation
Preparing the 3D anatomy…

UrOops3D · UroRef · © Nity G

Click me next Section 2 of 8 Anatomy The structures this operation works between, and the one it must not cross.

The structures in the scene

HoLEP: how the structures relateAlong the prostatic urethra from the resectoscope, apex to bladder. External sphincter: lies just distal to the veru Verumontanum (danger). Verumontanum: marks the distal limit of enucleation Adenoma: median and two lateral lobes. Adenoma: median and two lateral lobes: the plane runs between them Surgical capsule and venous sinuses (danger). Adenoma: median and two lateral lobes: lobes are released through the neck Bladder neck and ureteric orifices. Bladder neck and ureteric orifices: morcellate only when distended Full bladder (danger).Distal: penile endProximal: bladder!External sphincterVerumontanumAdenoma: median and twolateral lobes!Surgical capsuleand venoussinusesBladder neck and uretericorificesFull bladderlies just distal to the verumarks the distal limit ofenucleationthe plane runsbetween themlobes are released through theneckmorcellate only when distendedTargetDangerLandmarkContext
Along the prostatic urethra from the resectoscope, apex to bladder. Schematic, not to scale; relationships only.
  • From inside the urethra the anatomy is a line along the axis: sphincter, verumontanum, adenoma, capsule, bladder neck.
  • The operation happens in the millimetres between adenoma and capsule, and everything is safe exactly as long as the plane stays there.
  • ›Surgical capsule - the plane of the operation and the limit of resection; beyond it lie sinuses, fat and the neurovascular bundles.
  • ›External sphincter - distal to the verumontanum; the functional structure the case is built to protect.
  • ›The three lobes - median plus two lateral lobes; each is a separate enucleation with the same rules.
  • ›Full bladder - the safety chamber for morcellation; the wall is only safe when it is stretched away from the blades.
Click me next Section 3 of 8 Steps The operation in order, with the landmark that guards each move.

Operative steps

  1. The adenoma inside its capsule The enlarged transition zone sits inside the surgical capsule like fruit in its peel, with a thin plane between them. The operation is that plane: enucleate along it and the whole adenoma comes away while the capsule stays. Small perforating vessels cross the plane from the capsule, and they are what bleed. Distal to the verumontanum lies the external sphincter, the structure the case is built to protect.
  2. Cystoscopic survey The bladder is surveyed for trabeculation, diverticula, stones and tumours. Both ureteric orifices are found against the bladder neck, because a median lobe can hide them. The verumontanum and external sphincter fix the distal limit, and the prostatic urethral length and lobe sizes are read before the first cut. Laser settings (owner-supplied): a high-power holmium platform of 100 to 120 W, about 2 J at 40 to 50 Hz for enucleation; coagulation at lower energy or a longer pulse, or defocused by drawing the 550 micron fibre back slightly.
  3. Bladder neck incisions at 5 and 7 o'clock Each groove runs from the bladder neck to just proximal to the veru, either side of the median lobe, and is deepened through adenoma until the white circular fibres of the capsule show at its floor. The orifices are watched whenever the fibre works near the bladder neck.
    where it bites: a groove taken lateral at the bladder neck reaches the orifice.
  4. Median lobe The grooves are joined distally by a transverse incision just proximal to the veru. The plane under the median lobe is developed distal to proximal: the beak of the scope lifts the adenoma off the capsule while the laser divides the fibrous bands. Capsular vessels are coagulated as they appear, the fibre drawn back slightly to defocus. The lobe is freed at the bladder neck and pushed into the bladder, without undermining the trigone.
    where it bites: undermining the trigone puts the orifices at risk.
  5. Early apical release An inverted U is scored in the mucosa at the apex, lateral to the veru on each side, at low power and with minimal traction. The mucosal strip at 12 o'clock over the apex is divided early, so the sphincter mucosa is never stretched or torn as the lateral lobes come away.
    where it bites: traction or heat at the apex is the stress-incontinence mechanism.
  6. Lateral lobes A 12 o'clock incision from the bladder neck to the apex defines the top of each lateral lobe. The plane is entered at the apex from the median-lobe groove and swept laterally and upward, retrograde, the beak retracting and the laser taking bands and vessels. Each lobe is peeled round until it hangs only at the bladder neck, then divided and pushed into the bladder. The other side is the same, and the capsule is kept in view as the safety line throughout.
  7. Haemostasis Irrigation is turned down to reveal the small bleeders, and each is coagulated defocused or at low energy. The bladder neck and apex are inspected and both orifices confirmed intact. The finished cavity is wide and smooth, lined by capsule.
  8. Morcellation The resectoscope is exchanged for the nephroscope and morcellator (examples include VersaCut, Piranha and DrillCut). The bladder is filled fully on dual inflow first, because a collapsed bladder brings the wall to the blades. The window faces up, towards the tissue and away from the wall. Suction first draws tissue into the window, then the blades cut, and only when adenoma, not wall, is in the window. The tip stays central and the tissue is brought to it; chips go to the trap for histology. A mushroom fragment stuck at the bladder neck is trimmed with a loop.
    where it bites: a collapsed bladder or a blind bite takes detrusor.
  9. Finish A final look confirms the wall is intact, no fragments remain and the cavity is dry. A three-way 20 to 22 Fr catheter goes in with continuous irrigation, with traction only for bleeding at the bladder neck. Trial without catheter is often on day 1, and selected patients go home the same day. The whole specimen goes to histology: enucleation sees the whole adenoma and finds cancers that loop resection can miss.
Click me next Section 4 of 8 Danger zones Where this operation bites, and why it bites there.
Critical relationship

Danger zones

The spatial relationships the animation is built to make automatic. Before you read each one, ask yourself: at this point in the operation, what is about to go wrong, and what is my first move? The save for each sits in the Complications tab.

  • RiskThe apex at 12 to 6 o'clock - where sphincter, adenoma and capsule converge; the last cuts decide continence.
  • RiskCapsular breach - 5 and 7 o'clock on the floor: venous sinuses open and irrigant finds the circulation.
  • RiskMorcellator in an under-filled bladder - detrusor is one blind bite away; vision and distension are the two protections.
Practise it Take me into the scene Opens the animation at a danger moment and asks you to predict the mechanism and your first move before it reveals.
Click me next Section 5 of 8 Complications The save for each one: the first move, the escalation trigger, the op-note line.

Complications and immediate saves

Trigger each of these live in the Animation tab, then read the save: the first move, the escalation trigger, and the line that goes in the op note.

Capsular perforation

  • the plane breaks through into periprostatic venous sinuses; irrigant and fluid are absorbed.
The save
  1. Recognise the dark venous welling and the sudden loss of a clean plane; finish the pass, do not deepen it. first move
  2. Laser the visible sinuses point by point and drop irrigation pressure.
  3. Complete the case expeditiously and catheterise with traction for tamponade.
  4. Watch for fluid absorption: nausea, hypertension then hypotension, falling sodium; saline irrigation makes classic TUR syndrome rare but volume overload is real. escalation trigger
  5. Op note: site of breach, irrigation volumes and duration, electrolytes checked, catheter plan. document

Stress incontinence (sphincter injury)

  • laser or traction injury at the apex; early leak is common and mostly recovers, persistent leak is the injury that matters.
The save
  1. Prevention is operative discipline: distal limit at the veru, short apical strokes, no traction on apical tissue. first move
  2. Early post-op leak: reassure appropriately, refer for pelvic-floor training, and give it time.
  3. Review at three to six months with pad weights and a symptom diary.
  4. Persistent stress incontinence at a year → urodynamics and continence options including slings and the artificial urinary sphincter. escalation trigger
  5. Op note: apical technique, distal limit honoured, leak observed and rehabilitation plan. document

Bladder injury at morcellation

  • the morcellator engages detrusor with the bladder under-filled or tissue out of view.
The save
  1. Stop the blades the moment the wall appears in the field; disengage under vision. first move
  2. Re-fill the bladder fully and re-establish the working space before resuming.
  3. Inspect the site: mucosal injury is observed; a full-thickness defect needs decisions now.
  4. Full-thickness or intraperitoneal suspicion → catheter drainage, imaging, and repair with washout where peritoneal. escalation trigger
  5. Op note: event, wall status, drainage and imaging plan. document

Ureteric orifice injury

  • a groove taken lateral at the bladder neck, or a median lobe freed by undermining the trigone, reaches the orifice.
The save
  1. Find both orifices before the first cut and keep the bladder-neck work medial to them. first move
  2. If an orifice has been cut or charred, stop working at the neck on that side and look at it with the flow turned down.
  3. An injured orifice is stented at the end of the case and the stent removal date recorded.
  4. Loin pain, fever or a rising creatinine afterwards → imaging for obstruction or leak, with drainage. escalation trigger
  5. Op note: which orifice, the injury seen, stent placed and its removal date. document

Clot retention

  • clot collects at the bladder neck after the case and the catheter blocks.
The save
  1. Washout through the catheter; change to a larger three-way catheter if it keeps blocking. first move
  2. Keep continuous irrigation running fast enough to stay pink, not red.
  3. Check haemoglobin and clotting, and stop or reverse anticoagulants on the right advice.
  4. Clot that cannot be cleared, or bleeding that continues → evacuation and haemostasis in theatre. escalation trigger
  5. Op note: volume of clot, irrigation, bloods and the decision taken. document

Late: stricture, contracture, retrograde ejaculation

  • urethral stricture and bladder neck contracture appear months later; retrograde ejaculation is expected after a full enucleation.
The save
  1. Counsel before surgery: retrograde ejaculation is the rule; ejaculation-preserving variants spare tissue at the veru and bladder neck. first move
  2. Poor flow months later: flow rate and residual, then flexible cystoscopy to see a stricture or contracture.
  3. Strictures are dilated, incised or reconstructed; a contracture is incised.
  4. Recurrent narrowing after incision → urethroplasty or bladder neck reconstruction referral. escalation trigger
  5. Clinic letter: symptoms, flow study, cystoscopic finding and plan. document
Click me next Section 6 of 8 Troubleshooting When the case turns: the problem, then the next move.

Intra-operative troubleshooting

When the case turns: the problem, then the next move.

  • ActionPlane will not develop at 5 and 7 - come back to the veru and re-enter; the plane is found distally and developed proximally, not forced.
  • ActionVision lost in adenoma bleed - steady irrigation, pressure with the scope tip, laser the bleeding edge rather than chasing spots.
  • ActionLobe will not push into the bladder - complete the posterior release first; a tethered lobe at 6 o'clock is still attached.
  • ActionMorcellator will not engage tissue - fill the bladder, window up, suction first, bring the tissue to the blades; never chase tissue to the wall.
  • ActionMushroom fragment at the bladder neck - trim it with a loop or bipolar resection.
Click me next Section 7 of 8 FRCS viva Say it out loud, then mark yourself against the model answer.

FRCS viva questions

The examiner stems this scene prepares you for. Try to answer out loud first, then reveal, and learn the discriminator, the detail that turns a pass into a strong pass.

QCompare HoLEP with TURP for a 90 g prostate.reveal answer
  • Above roughly 70 to 100 grams, loop resection becomes a long, bloody, staged affair while HoLEP is size-independent: the enucleation plane exists whatever the gland weighs, so clearance, flow outcomes and durability are equivalent to open simple prostatectomy without the incision.
  • HoLEP is saline-based, which removes the classic dilutional hyponatraemia of monopolar TURP, its transfusion needs are lower in the larger glands, and it produces tissue for histology across the whole adenoma.
  • The trade is the learning curve, the equipment, and morcellation as a second skill with its own complication profile.
  • For the patient on anticoagulation or with retention, HoLEP is often the better operation in larger glands, and it is also the durable answer for the young man with a big gland who does not want repeat procedures.
  • The honest answer names the curve: the first cases take longer than the equivalent TURP.
Strong pass

The plane is size-independent; the learning curve is the cost

  • Argument Size-independence of the plane
  • Cost The learning curve, not instant equivalence
Examiner note
Making size-independence of the plane the argument, and naming the learning curve as the real cost rather than pretending equivalence is immediate.
QWhy does HoLEP cause more transient stress incontinence than TURP, and what do you tell the patient?reveal answer
  • The enucleation dissects along the capsule all the way to the apex, and at the apex the adenoma is closest to the external sphincter;
  • thermal and traction effects on the sphincter and its support produce early leak in a visible minority of patients.
  • Most recover within weeks to months as swelling resolves and pelvic-floor function compensates.
  • I counsel patients before surgery: early leak is common, pads for a period are normal, and pelvic-floor exercises start once the catheter is out;
  • a small number have persistent stress incontinence at a year, and those men are investigated with urodynamics and offered the full continence ladder, including bulking, slings and the artificial urinary sphincter.
  • Framing the risk honestly before surgery is part of the operation, because a warned patient works with the rehabilitation and an unwarned patient litigates it.
Strong pass

Say all three

  • Giving the recovery timeline with numbers framed as a minority
  • The year-one audit point with urodynamics
  • Not just reassurance
Examiner note
Giving the recovery timeline with numbers framed as a minority, and the year-one audit point with urodynamics, not just reassurance.
QYour patient develops confusion and hypotension in recovery after an unexpectedly long enucleation. What is happening?reveal answer
  • Assume fluid absorption until proven otherwise, even with saline irrigation.
  • A long case with open venous sinuses absorbs a volume of Normal saline, which presents as volume overload with a normal or high sodium, rather than the dilutional hyponatraemia of glycine TURP syndrome, though a mixed picture and other causes, including sepsis from bacteriuria and peri-operative cardiac events, are on the list.
  • I would check electrolytes, consider a chest film for pulmonary oedema, involve the anaesthetist early, treat volume overload with oxygen, diuresis and electrolyte correction, and culture urine and blood.
  • The operative lesson is upstream: sinus breach plus long irrigation time is the setup, so the response to a dark welling field is to finish the pass, haemostase and exit, not to persist.
Strong pass

Distinguishing saline volume overload from classic glycine TURP syndrome while still acting on it as an emergency.

QWhat is the role of histology after HoLEP for benign disease?reveal answer
  • The whole adenoma goes to pathology, and that is one of the quiet advantages of enucleation: incidental prostate cancer is found in a proportion of specimens, including anterior and transition-zone tumours that systematic biopsies undersample.
  • A finding of cancer changes surveillance and can change the patient's whole pathway, including MRI and MDT discussion, so the specimen is bagged completely and labelled, never discarded.
  • It also works in reverse: a known low-risk cancer patient needing obstruction surgery has a discussion about HoLEP as debulking histology, with clear counselling that enucleation is not cancer treatment.
  • The teaching point is that in HoLEP the pathologist sees more gland than in any loop resection, and the team must be ready for what that finds.
Strong pass

Say both

  • Naming transition-zone detection as the mechanism
  • Having a ready answer for the incidental cancer pathway
Examiner note
Naming transition-zone detection as the mechanism and having a ready answer for the incidental cancer pathway.
Click me next Section 8 of 8 Evidence The guidance each of these answers is built on.

Evidence and guidance

EAU Guidelines
Non-Neurogenic Male LUTS
Modality selection across TURP, HoLEP and laser vaporisation by prostate size and patient factors.
Open guideline
NICE CG97
Lower urinary tract symptoms in men: management
UK pathway for male LUTS including referral thresholds and surgical options.
Open guideline
BAUS
British Association of Urological Surgeons
UK consent standards and outcome data for bladder-outlet surgery.
Open guideline
Two minutes

Close the lap: recall it before you leave.

Say it aloud, then reveal. Reading is not remembering.

  1. 01 The relationship Say the critical spatial relationship out loud, then reveal. reveal
    Memory frame

    Sphincter · veru · adenoma · capsule · bladder neck

    • Plane The millimetres between adenoma and capsule
    • Safe Exactly as long as the plane stays there
    Why?
    From inside the urethra the anatomy is a line along the axis: sphincter, verumontanum, adenoma, capsule, bladder neck. The operation happens in the millimetres between adenoma and capsule, and everything is safe exactly as long as the plane stays there.
  2. 02 The first move Capsular perforation. Your first move? reveal
    First move

    Finish the pass, do not deepen it

    • Dark venous welling
    • Sudden loss of a clean plane
    More detail
    Recognise the dark venous welling and the sudden loss of a clean plane; finish the pass, do not deepen it.
  3. 03 The escalation trigger Capsular perforation. What makes you call for help? reveal
    Escalate when

    Watch for fluid absorption

    • Nausea
    • Hypertension, then hypotension
    • Falling sodium

    Saline makes classic TUR syndrome rare; volume overload is real.

    More detail
    Watch for fluid absorption: nausea, hypertension then hypotension, falling sodium; saline irrigation makes classic TUR syndrome rare but volume overload is real.
  4. 04 The discriminator What turns a pass into a strong pass? reveal
    Strong pass

    The plane is size-independent; the learning curve is the cost

    • Argument Size-independence of the plane
    • Cost The learning curve, not instant equivalence
    Examiner note
    Making size-independence of the plane the argument, and naming the learning curve as the real cost rather than pretending equivalence is immediate.
  5. 05 The pitfall Where does this operation bite first? reveal
    Pitfall

    The apex, 12 to 6 o'clock

    Sphincter, adenoma and capsule converge; the last cuts decide continence.

    Why?
    The apex at 12 to 6 o'clock: where sphincter, adenoma and capsule converge; the last cuts decide continence.

Revision practice with self-marked answers, not an assessment of clinical competence. Kept in this browser only; it does not sync between devices.