Lower Eyelid Reconstruction Treatment & Management
- Author: Mounir Bashour, MD, PhD, CM, FRCSC, FACS; Chief Editor: Zubin J Panthaki, MD, CM, FACS, FRCSC more...
Repair of lower eyelid defects involving the eyelid margin and extending from one third to one half of the horizontal length of the eyelid margin requires advancement of adjacent tissue to effect closure. Direct closure of full-thickness defects (see image below) greater than one third of the eyelid may result in excessive tension in the wound, leading to wound dehiscence and eyelid notching.
Tenzel semicircular rotation flap
The author's choice to repair defects of moderate size is the Tenzel semicircular rotation flap (see image below). This technique involves the rotation of a semicircular musculocutaneous flap beginning at the lateral canthus, extending upward in a semicircular fashion. The flap is designed according to the size and location of the lower eyelid defect, and it must extend above the lateral canthal angle to ensure elevation of the lower eyelid during wound healing. Once the flap is rotated into position and sutured, adequate lateral canthal fixation must be achieved. Conjunctiva from the inferior fornix should be advanced or rotated into position to cover the posterior surface of the skin muscle flap. Skin closure of the semicircular donor site is the final step.
Larger flaps can be backed with ear cartilage, nasal septal or alar chondromucosal grafts, or a free tarsoconjunctival flap. When used, these grafts must be fixated inside the lateral orbital rim to achieve lateral support for the newly reconstructed eyelid.
Tarsoconjunctival bridge flap (modified Hughes procedure)
Lower eyelid defects greater than 50% of the horizontal length of the eyelid may be repaired with a tarsoconjunctival bridge flap from the upper eyelid (see images below).
This procedure effectively recreates the posterior lamella of the lower eyelid through use of a segment of upper eyelid tarsus and conjunctiva. Since the flap must be left in place from 4-6 weeks prior to second-stage separation, it is not suited for patients sighted only in the involved eye or of amblyogenic age. In such situations, a free tarsoconjunctival graft from the opposite upper eyelid is more appropriate. Hughes originally described a tarsoconjunctival flap involving the eyelid margin. This procedure no longer is performed.
The modified Hughes procedure is performed as follows. A 4-0 silk traction suture is placed in the upper eyelid margin. The upper eyelid is everted over a Desmarres retractor. Tarsus and conjunctiva of the upper eyelid are incised horizontally 4 mm proximal to the eyelid margin. At least 4 mm of tarsus must be left for lid stability and to prevent the complication of upper lid entropion. A tarsal conjunctival flap is developed by dissecting the tarsus and conjunctiva away from the levator aponeurosis and Müller muscle. Dissection continues superior to the level of the Whitnall ligament.
The bridge flap is advanced into the defect of the lower eyelid; it may be moved laterally or medially, depending on the location of the lower eyelid defect. Edges of the tarsoconjunctival advancement flap are sutured to the remnants of the medial and lateral tarsus of the lower eyelid. If the lower eyelid defect involves either the medial or lateral canthal angle, the tarsoconjunctival flap must be fixated appropriately either to the lateral orbital tubercle or to the posterior lacrimal crest.
After the flap has been secured in position, a full-thickness skin graft is placed over the anterior surface. Skin can be harvested from the upper eyelid or from the retroauricular area. Alternatively, a locally based random flap may be advanced over the posterior lamella to create the new anterior lamella. The flap is separated at 4-6 weeks. A grooved director is slid underneath the flap anterior to the cornea, and the flap is divided. Conjunctiva is sutured to the lower eyelid margin. The Müller muscle and the levator aponeurosis are dissected away from the overlaying skin and allowed to retract. This prevents postoperative upper eyelid retraction and lagophthalmos.
Free tarsoconjunctival graft
Free tarsoconjunctival grafts from an upper eyelid also may be used to correct defects in the lower eyelid. This composite graft is harvested from the upper eyelid tarsus of the opposing eyelid or from the alternate upper eyelid. A marginal 4-mm strip of tarsus is left in the donor eyelid. The upper tarsal defect is not closed. Edges of the free tarsoconjunctival graft are sutured to the edges of the lower eyelid defect. Conjunctiva at the inferior border of the free tarsoconjunctival graft is sutured to the palpebral conjunctiva. The anterior lamella is reconstructed by a local musculocutaneous flap.
Mustarde cheek rotation flap
Lower eyelid defects involving the entire lower eyelid may be reconstructed using a Mustarde cheek rotation flap (see image below). This large skin muscle flap is rotated from the cheek to repair large lower eyelid defects. Incision begins at the lateral canthal angle, extends upward onto the temple, and swings posteriorly just anterior to the ear and then inferiorly across the mandible. Establishing good vertical height to this flap is important so the correct position of the lateral canthal angle can be achieved postoperatively. The posterior lamella of this flap must be reconstructed with a free tarsoconjunctival graft, a nasal septal cartilage graft, or with mucous membrane.
See the patient 1 day postoperatively for a routine check. If nonabsorbable sutures were used, the patient should return for suture removal in 1 week.
Eyelid marginal positional abnormalities usually are not serious complications, but they can be frustrating for both the patient and surgeon, sometimes requiring further surgery for correction. Other complications of lower lid reconstruction include the following:
Lateral tissue sag
Upper eyelid instability
Postoperative lower lid ectropion can result from anterior lamella shortening or lower lid laxity. Vertical shortage of lower lid skin is worsened by the effect of gravity and altered lid mobility. To avoid this, the surgeon should not hesitate to use full-thickness skin grafts during the initial reconstruction. Upper advancement flaps (cheek) are poor substitutes and often worsen the problem, although a suborbicularis oculi fat (SOOF) lift can be helpful. Lower lid laxity may result from excessive horizontal length of the lower lid (oversized grafts) or poor fixation at the lateral canthal tendon. These can be avoided by measuring the correct length of tissue using calipers, keeping the lower lid stretched to estimate the desired level of tension, and using a nonabsorbable suture fixed to the periosteum inside the lateral orbital rim above the midpupillary line.
Lateral lid sag occurs for much the same reasons as ectropion and can be avoided similarly.
Upper lid retraction can occur with the modified Hughes procedure. Careful dissection of the flap using a moist cotton-tip applicator and tenotomy of advanced Müller muscle can prevent upper lid retraction. If it occurs, it can be treated using a levator recession with or without spacer material. Upper lid instability results if the tarsal margin has been violated; leaving at least 4 mm of tarsus is essential for upper lid stability.
To avoid postoperative orbital hematoma, meticulous cautery should be used, and ice compress dressings rather than tight pressure dressings should be used afterward, ensuring that visual acuity does not deteriorate.
Outcome and Prognosis
Both function and cosmesis measure outcome. The outcome is poorer with greater initial defect. However, in general, all of the procedures described in this article have adequate, if not excellent, outcomes, even for the larger defects, if meticulous attention to detail is taken in the repair.
A study by Rathore et al found good results with full-thickness skin grafts in eyelid reconstruction. The study, which included 100 Caucasian patients (60 with lower eyelid defects and the rest with upper eyelid or canthal defects), found that 94% of the group obtained good eyelid color match and that as many as 95% achieved good final eyelid position. Patients with late sequelae included four with lower eyelid graft contracture and 23 with hypertrophic scarring.
Future and Controversies
No real controversies exist in this field. Future refinements or modifications of technique remain possible, although at a slower rate, and the use of artificial materials (ie, to use in place of skin and connective tissue) likely will be incorporated as they become available, especially for massive defects.
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