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10.5 Operations 129
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10.5.1.1 Principle and Considerations
Draw the levator aponeurosis down by pulling on Müller’s muscle to create a fold. The aponeurosis fold appears as a ‘white line’. Suture the white line to the upper edge of the tarsal plate. This effectively shortens the aponeurosis.
10.5.1.2 Case Selection
Ptosis with good levator function (LF 12 mm). This includes age related, contact lens induced and post-surgical ptosis.
10.5.1.3 Steps
1. Mark the new skin crease position on the surgical side while holding the skin
on gentle upward stretch (Fig. 10.8a). Match its height with the crease on the
contralateral lid. In bilateral ptosis set it at about 7–8 mm (for occidental lids).
2. Incise the skin along the marked line with a no. 15 scalpel while protecting the
eye with a guard held under the lid.
3. Deepen the incision centrally with Westcott scissors (Fig. 10.8b). Dissect per-
pendicularly through the orbicularis and posterior levator aponeurosis until the
upper 1/3 of the tarsal plate is reached.
Note: Angling the dissection can cause you to dissect too proximally, missing the tarsal plate, or too low, where the aponeurosis inserts into the tarsal plate.
4. Bluntly dissect the pretarsal space medially and laterally with closed Westcott
scissors. Then extend the incision to the full extent of the skin incision. Do this
with one blade of the scissors inside the tunnel and the other on the orbicularis
surface (Fig. 10.8c).
5. Clean the exposed anterior surface of the upper 1/3 of the tarsal plate of any
remaining connective tissue, to ensure firm healing (Fig. 10.8d).
Note: Not cleaning thoroughly can lead to poor union and late surgical failure when the sutures absorb.
6. Pull the lid downwards with toothed forceps and bluntly dissect upwards with
a cotton bud, beyond the upper edge of the tarsal plate to expose the anterior
surface of Müller’s muscle (Fig. 10.8e).
Note: This is usually an easy manoeuvre, but occasionally firmer connective tissue is encountered and a little sharp dissection with Westcott scissors is required. In a few patients some yellow fat may be encountered in this plane.
7. Now pull the upper extent of Müller’s muscle firmly downwards with toothed forceps (e.g., Jayles) and continue the blunt dissection superiorly with a cotton bud until a white fold of connective tissue appears—the so called ‘white line’ (folded levator aponeurosis) (Fig. 10.8f).
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8. Grasp the white line firmly and gently stretch it downwards. Instruct the patient to look upwards. You should feel a strong tug. This confirms that the structure is indeed the levator aponeurosis.
9. Insert a double armed suture 6/0 absorbable (Vicryl) suture through the white line centrally with a double bite.
10. Insert both ends of this central suture into the upper 2–3 mm of the exposed tarsal plate as partial thickness bites. Before completing each needle bite, evert the lid to check that the needle pass has not penetrated the conjunctival surface. If it has, withdraw the needle, and replace it more superficially to avoid corneal irritation by the suture (Fig. 10.8g).
11. Tighten this suture and tie it as a bow. Check the lid height, curve, and move­ment by asking the patient to look first straight ahead and then up and down. The lid margin height should be 1–2 mm higher than the contralateral side to compensate for the local anaesthetic induced orbicularis paralysis.
12. Undo the bow and insert two further white line sutures similarly, one on either side and each about 3 mm away from the central one. To do this ask an assistant to pull downwards on the previously placed central suture to keep the white line exposed.
13. Undo the temporary bows and pass one of each pair of suture ends out through the upper and the other through the lower skin edge (Fig. 10.8h).
14. Tie the sutures on the skin. This advances the white line to the tarsal plate, closes the incision, and reforms the skin crease. Do not cut the suture ends at this stage but clip them out of the way.
15. Complete skin closure with a continuous 6/0 or 7/0 absorbable suture taking a bite between each of the knots and tie it at each end (Fig. 10.8i).
Note: Although this suture is usually superfluous, it keeps the incision closed if you need to remove an aponeurosis suture early because of an overcorrection.
16. Now pull the white line suture ends down and cut them at the level of the lid margin. This ensures that the ends remain exposed and long enough to identify and grasp easily should you need to remove them.
17. Instruct the patient to keep the eye closed and apply antibiotic ointment and a pressure dressing overnight.
18. Review the lid height the next day. If there is an overcorrection remove one or more of the levator aponeurosis sutures by lifting the knot and cutting one side of the suture below it. Pull the whole suture out.
10.5.1.4 Notes
Some surgeons advocate using only a single aponeurosis suture to save time. While this can work it does risk creating an unattractive ‘cathedral arch’ upper lid con­tour if you insert the suture too low on the tarsal plate. Furthermore, there is no redundancy for the eventuality of suture failure. Using three sutures gives more control over the lid contour and the extra time they take to place is a worthwhile investment for the novice.
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10.5.2 Conversion to an Anterior Levator Aponeurosis
Reinsertion/Resection Fig. 10.9
Steps 1–5 are as above. If step 7 is problematic (the white line cannot be found) or the lid height is too low at the end of surgery proceed as follows:
a b
c d
Fig.10.9 Conversion to an anterior levator aponeurosis reinsertion. a While retracting the upper skin and orbicularis edge upwards, grasp the anterior layer of the levator aponeurosis (immedi­ately posterior to the orbicularis) and incise it. b Pull the aponeurosis and bluntly dissect upwards to expose the orbital septum and pre-aponeurotic fat pad. c Insert a double armed 6/0 absorbable suture into healthy aponeurosis. d Place 2 more sutures similarly and insert them into the upper tarsal plate, bringing all three pairs out through the skin edges. e Tie the sutures while observ­ing the lid margin position and curve. Insert a continuous skin suture taking a bite between each aponeurosis suture
e
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7. While pulling the upper lid skin incision edge upwards, grasp the layer imme-
diately posterior to the orbicularis muscle layer. This is the anterior layer of the levator aponeurosis (and not the orbital septum as many mistakenly think). Incise this layer along the whole length of the wound (Fig. 10.9a)
8. Pull down the proximal cut edge of the aponeurosis and bluntly dissect upwards
on its anterior surface to expose the actual orbital septum. Pressing on the lower lid causes the pre-aponeurotic fat pad to flow forwards under the septum, positively identifying it.
9. The orbital septum is not a single layer but made up of seven thin layers.
Divide the several thin layers of orbital septum to expose the pre-aponeurotic fat (Fig. 10.9b)
Note: This fat is very fine and has a characteristic deep yellow colour. It is a constant landmark in the lid and helpful for orientation.
10. Retract the pre-aponeurotic fat to expose the full extent of the levator aponeu­rosis, up to the transversely running Whitnall’s ligament and the aponeurosis levator muscle junction.
11. Insert a double armed 6/0 absorbable suture into healthy aponeurosis, close to its lower edge (Fig. 10.9c)
12. Insert this same suture into the upper tarsal plate centrally and tie it with a bow.
13. Assess the lid height by asking the patient to follow your finger. The operated lid should be set 1–2 mm higher than the other side to compensate for the anaesthetised orbicularis. If the lid is not at the correct height replace the suture higher or lower in the aponeurosis and recheck the lid height.
14. Place two further sutures similarly, one on either side of the first.
15. Now bring all three pairs of aponeurosis/tarsal plate sutures out through the skin edges, one of each pair on either side of the skin incision (Fig. 10.9d)
16. Tie the sutures while observing the lid margin position and curve. If a suture is lifting the lid too much you can loosen it before placing the locking throw.
17. Before cutting the suture ends run a continuous suture along the length of the wound taking a bite between each aponeurosis suture. This suture keeps the wound closed should the aponeurosis sutures require early removal (Fig. 10.9e)
18. Cut the aponeurosis sutures about 4 mm long so that they are easy to find and grasp, should early removal be required.
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10.5.3 Levator Resection Fig. 10.10
10.5.3.1 Principle and Considerations
The approach to levator resection is identical to the anterior levator aponeurosis reinsertion/resection described above. It differs in that the ‘horns’ (the medial and lateral extent) of the levator aponeurosis are cut and the aponeurosis dissected free from the overlying Whitnall’s ligament. Müller’s muscle is also separated from its insertion into the upper border of the tarsal plate and dissected free from the underlying conjunctiva. This enables the levator/Müller’s complex to be pulled down as one to enable sutures to be placed higher up within the levator muscle belly. Check the lid height as previously. The desired ‘on table’ lid height depends on the pre-operative levator function.
10.5.3.2 Case Selection
Ptosis with levator function of 5–11 mm.
Because levator resection is reserved for patients with poorer LF, the surgical outcome is less predictable. Therefore, it should be performed by more experi­enced surgeons. A detailed description of the technique is beyond this book’s remit.
a b
Fig.10.10 Levator resection ptosis correction. a After exposing the levator aponeurosis cut its medial and lateral horns. b Pull the levator down and insert a suture into the muscle belly and tarsal plate. Check the lid height and replace if necessary. c Insert 2 more sutures similarly
c
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10.5.4 Addition of a Skin and Muscle Blepharoplasty Fig. 10.11
10.5.4.1 Principle and Considerations
As already mentioned, the anterior approach ptosis corrections described above may easily be combined with skin and muscle blepharoplasty. Perform this conver­sion after performing the ptosis correction but before bringing the levator sutures out through the skin and tying them. Drape the excess upper edge skin and orbic­ularis over the lower wound edge with the eye closed to ascertain how much may safely be removed.
10.5.4.2 Case Selection
Any ptosis correction in which there appears to be excess upper lid skin at the end of the procedure.
10.5.4.3 Steps
1. With the upper eyelid closed drape the upper wound edge skin and orbicularis
over the lower edge to achieve the desired skin appearance (Fig. 10.11b).
2. Make an upward cut centrally through the draped skin and orbicularis as far as
the lower wound edge (Fig. 10.11c).
3. Pull down and laterally on the flap you have created and excise the redundant
anterior lamellar triangle with Westcott spring scissors to meet the medial end
of the wound (Fig. 10.11d).
4. Pull the lateral flap down and medially and repeat the same manoeuvre to the
lateral wound end (Fig. 10.11e).
5. The blepharoplasty is now complete. Proceed with wound closure by insert-
ing your preplaced levator sutures across the wound as previously described
(Fig. 10.11f, g).
Notes: You may extend the ptosis correction wound laterally to remove more lateral skin if required.
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a b
c d
e f
Fig.10.11 Conversion to blepharoplasty. a Insert the aponeurosis sutures into the tarsal plate only. b With the upper eyelid closed drape the upper wound edge skin and orbicularis over the lower edge to achieve the desired skin appearance. c Make an upward cut through the draped skin and the orbicularis as far as the lower wound edge. d Excise the medial redundant anterior lamel- lar triangle with Westcott spring scissors to meet the medial end of the wound. e Excise the lateral triangle similarly. f With the blepharoplasty complete, proceed with wound closure as previously. g Place a skin suture
g
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a
4mm
b
8mm
c d
e f
Fig.10.12 Müllers muscle resection. a Double evert the upper lid and mark the upper border of the tarsal plate. Using a calliper, place a row of marks 4 mm from the border. b Then place a third row of marks again 4 mm more proximally to the previous ones. c Insert a 5/0 monofilament trac­tion suture through the conjunctiva and Müller’s muscle along the middle row of marks. Pull down a fold of conjunctiva and Müller’s muscle and apply two fine artery forceps across this fold span­ning the first and third row of marks. Insert a 5/0 monofilament suture transcutaneously so that it exits the conjunctival surface at the lateral edge of the crushed fold, just above the artery clip. d Pass this suture in and out through the fold above the artery clip. Bring the suture out through the skin crease medially. e Remove the artery clips, one at a time and cut along the centre of the crush line to excise the fold of conjunctiva and Müllers. f Pull the suture ends tight to take up any slack. g Tape them to the brow skin in a relaxed position so that they do not impair eyelid closure
g
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10.5.5 Müller’s Muscle Resection Fig. 10.12
The simplest and least invasive ptosis operation is a Müller’s resection. It is seduc­tively simple but only effective when restricted to the specific selection criteria already mentioned. The indications for it are therefore limited. Müller’s resection is very unlikely to over-correct a ptosis and requires no dissection. It replaces the formerly popular, but now outdated, Fasanella Servat operation. Both sacrifice conjunctiva and work on the principle of shortening Müller’s muscle. The latter also sacrifices the upper tarsal plate (rarely a good idea).
10.5.5.1 Principle and Considerations
Müller’s muscle modulates the effect of the levator on the lid margin. Shortening Müller’s muscle lifts the lid by about 2 mm.
10.5.5.2 Case Selection
Patients with no more than 2 mm of ptosis and normal levator function. Some surgeons advocate only operating on patients whose ptosis disappears after instill­ing a drop of phenylephrine. While these patients invariably do well so do many that fail to respond to the phenylephrine test. This is unsurprising as the procedure excises Müller’s muscle rather than relying on it to lift the lid.
10.5.5.3 Steps
1. Double evert the upper lid over a large Desmarres retractor, using it as a lever
to visualize the conjunctiva above the tarsal plate.
2. Dry the conjunctiva and mark the upper border of the tarsal plate using a mark-
ing pen. Make three marks, one in the centre of the lid and one 6 mm to either
side.
3. Using a calliper, place a further row of three marks 4 mm proximal to the first
row (Fig. 10.12a).
4. Then place a third row of marks again 4 mm more proximally to the previous
ones (Fig. 10.12b).
5. Insert a 5/0 monofilament traction suture through the conjunctiva and under-
lying Müller’s muscle along the middle row of marks. Remove the Desmarres
retractor.
6. Pull downwards on the traction suture to pull down a fold of conjunctiva and
Müller’s muscle. Apply two fine artery clips (or use a Putterman clamp if avail-
able) across this fold to span the first and third row of marks (Fig. 10.12c). The
clips contain an 8 mm wide (4 mm + 4 mm) ellipse of conjunctiva and Müller’s
muscle.
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Note: Ensure that the tips of the artery clips are pointed slightly down (as in the diagram) to avoid creating a central lid peak.
7. Insert a 5/0 monofilament suture transcutaneously at the skin crease (approx­imately 7 mm from the lid margin) so that it exits the conjunctival surface at the lateral edge of the crushed fold, just above the artery clip (Fig. 10.12c).
8. Pass this same suture through the conjunctiva and Müller’s fold above the artery clip exiting on the other side. Then pass it back. Repeat this approxi­mately four or five times to reach the medial end of the fold (Fig. 10.12d). The more suture passes that are made, the harder it will be ultimately to remove the suture.
9. Bring the suture out through the skin crease medially.
10. Remove the artery clips, one at a time and cut along the centre of the crush line to excise the fold of conjunctiva and Müllers along with the traction suture (Fig. 10.12e, f). Allow the everted lid to flip back to its normal orientation.
11. Pull the suture ends tight to take up any slack and tape them to the brow skin in a relaxed position so that they do not impair eyelid closure (Fig. 10.12g)
12. Apply antibiotic ointment to the eye and secure a protective shield. No pad is required.
13. Review the patient a week later and remove the suture by cutting one end flush with the skin and pulling on the other end. The smooth monofilament suture slips out with minimal discomfort.
Note: In a child an absorbable suture with buried knots can be used to avoid the need for suture removal. However, when it loosens it may cause corneal irritation, which is why a smooth removable suture is preferred for adults.
10.5.6 Frontalis Suspension (Fox’s Pentagon) Fig. 10.13
10.5.6.1 Principle and considerations
A patient with poor levator function does not benefit from having their levator muscle shortened. The only alternative power source available for opening the lid is the frontalis muscle. Frontalis suspension is not technically difficult to perform but as it is rarely needed it is harder to gain experience with this technique. Fur­thermore, patients with poor levator function have a less satisfactory outcome from ptosis surgery. The likelihood of under or over correction is much higher as is the risk of symptomatic corneal exposure.
The operation works by connecting the eyelid to the brow using a sling. The best and longest lasting sling material is undoubtedly living autogenous fascia Lata, harvested from the patient’s own thigh. Such harvesting falls outside the remit of this book (but is available to view on YouTube [2]). However, for the sake of completeness I describe here the Fox pentagon frontalis suspension using a sil­icone sling. Non-autogenous materials are more prone to infection, extrusion, and late failure. The silicone sling may be supplied swaged onto two long, extremely sharp, malleable needles. I strongly urge the novice not to use these as they are