Primary Endonasal Rhinoplasty: Double-Dome Technique via Intercartilaginous Dome-Delivery

Surgical refinement of the nasal tip is considered by many to be one of the most challenging components of rhinoplasty. At the heart of the challenge is the need to not only adequately access and visualize but also control the complex three-dimensional architecture of the alar cartilages while being cognizant of tip support mechanisms and postoperative contracture. Although numerous approaches have been described throughout the literature, the endonasal delivery flap technique continues to be a workhorse in the armamentarium of surgical approaches for tip refinement. This chapter will focus on the beauty, versatility, and simplicity of endonasal tip surgery.

Tip rhinoplasty techniques have evolved substantially since Joseph first introduced cosmetic rhinoplasty in the late 1800s. This evolution continues even to this day as discussions on the “ideal” surgical approach for nasal tip contouring ensue. The various incisions commonly used in rhinoplasty and their respective indications are illustrated in Figure 6-1 . Four essential points must be kept in mind when choosing an approach for intermediate to advanced tip maneuvers: (1) the ability to adequately visualize the entire alar complex including all areas of the medial, intermediate, and lateral crura; (2) the ability to modify each alar unit separately and address asymmetries; (3) the ability to maintain or reconstitute tip support mechanisms; and (4) the ability to minimize resection of natural structural elements.

Figure 6-1

A, Marginal incision. B, Intercartilaginous incision. The intercartilaginous incision violates an important tip support mechanism, which must be considered when the tip is reconstructed. The double-dome suture helps to stabilize the tip complex.

Next, we describe our philosophy, which is based on the creation of the double-dome unit as described by McCollough and English. In our hands, this particular tip-sculpting technique has become a workhorse in tip modification as it nicely fulfills the above criteria. In fact, a 15-year review of the senior author’s results with use of the double-dome unit procedure for tip rhinoplasty not only has proved the technique to be reliable with consistent results but also has shown it to carry a low rate of revision. In this chapter, we will first describe our basic surgical technique for endonasal intercartilaginous dome-delivery via the double-dome technique, followed by a review of specific nasal tip deformities and steps utilized to correct these.

Preoperative Analysis and Patient Selection

It is critical to determine the exact tip deformities before creating a surgical plan. What is the aesthetic problem of the tip and what is one attempting to achieve? This begins with a detailed examination during the consultation period. Standardized forms are helpful for ensuring a complete examination as well as simplifying documentation ( Figure 6-2 ). The tip shape should be described, such as bulbous, twisted , or infantile. Both the degree of rotation and the extent of projection should be evaluated. Skin thickness is critical to assess, and this issue alone may dictate the approach to be taken and/or the procedure to be performed. Palpation is helpful in determining the nature, volume, strength, and resiliency of the lobular cartilages as well as in evaluating tip support. Finally, it is important to note columellar abnormalities and their relation to the alar cartilages.

Figure 6-2

Standardized forms used for ensuring a complete examination as well as simplifying documentation.

The ideal patient for these techniques has been described by Tardy. The ideal patient has a slightly bifid or broad tip with dual-dome highlights. Thin skin and sparse subcutaneous tissue allow for more refined results from these endonasal techniques. The alar cartilages themselves must be firm and strong. Finally, the alar sidewalls should be thin and delicate, yet resist collapse and recurvature. By using the endonasal delivery approach along with a graduated approach to tip contouring, excellent aesthetic results can be achieved.

There are certain conditions, in our experience, that favor the use of the external columellar approach. It is often difficult to deliver, in a safe and adequate manner, alar cartilages in a patient with scar tissue in the lobule from previous surgery or trauma. Middle nasal vault deformities, in our experience, are more easily corrected through the external columellar approach. Patients with marked asymmetry in the nasal tip, with thin skin and bossa, may require camouflage tip grafting sutured in place. Also, marked twisting of the columella with significant discrepancies between the two medial crura may necessitate the use of an external columellar approach. Other indications for the external approach are extremely soft alar cartilages with no inherent support as well as marked overprojection, overrotation, underprojection, and underrotation of the lobule.

All patients are initially seen in consultation with their selected surgeon. The consult room is designed to put the patient at ease while still maintaining a professional environment. The nasal analysis begins with the patient on a comfortable bar stool in front of a three-way mirror with the physician directly behind him or her. Together they analyze the nose with the physician gently guiding the discussion. The three-way mirror not only allows the patient to get a more accurate view of the three-dimensional qualities of their nose but also relays specific concerns to the surgeon.

An in-depth nasal history is taken during the consult. Inquiries include any previous nasal trauma or surgery, difficulties breathing through the nose, any history of sinus disease or allergies, and present nasal medications. The physician also reviews the more extensive complete history form, which is completed by the patient prior to consultation. An intranasal examination is performed at this time to detect deformities of the septum, enlargement of the turbinates, or other intranasal pathology. A preoperative rhinoplasty form is also completed to document the consultation findings as well as for later reference.

The procedure should be thoroughly discussed at this time and goals summarized with the patient. The physician reviews with the patient what to expect on the day of surgery, including the length of surgery, anesthesia, recovery, and discharge. Initial postoperative care and activity restrictions are also discussed. Finally, the limitations of the surgery, as well as possible complications, are given as part of the informed consent.

The consultation is then continued in the photography suite, where computer imaging is used to illustrate the planned aesthetic endpoint. This allows for confirmation that both the patient and the surgeon agree on the desired goals to be achieved. Following this, a full set of nasal images are taken for preoperative documentation.

The last phase of the consultation is spent with the scheduling nurse, where questions can be answered in what often is a more comfortable setting for the patient. Fees are reviewed with the patient, and signed copies of the procedures and fees are given to the patient. Any necessary lab work is arranged at this time.

Prior to surgery, all patients receive folders with detailed instructions for surgery, prescriptions, and a booklet reviewing postoperative healing and expectations. All patients start an oral antibiotic the day prior to surgery, most often either oral cephalexin (Keflex) or azithromycin (Zithromax), and continue this for 5 days.

Surgical Technique

At 1.5 hours prior to surgery, patients are administered oral diazepam (Valium), promethazine (Phenergan), metoclopramide (Reglan), and dexamethasone (Decadron) as well as oxymetazoline nasal (Afrin Nasal Sinus) spray. In the operating room, deep sedation, typically using intravenous propofol, is instituted prior to infiltration of the local anesthesia. First, pledgets soaked in 4% cocaine are placed intranasally. After adequate time for decongestion, infiltration is started with 2% lidocaine (Xylocaine) with 1 : 50,000 epinephrine. No more than 7 to 8 mL is injected to minimize volume distortion.

The delivery approach is begun by making either a complete transfixion or a high septal transfixion incision depending on tip projection ( Figure 6-3 ). Curved sharp scissors are then used to dissect up over the anterior superior angle and expose the upper lateral cartilages. Next, intercartilaginous and marginal incisions are made in a standard fashion (see Figure 6-1 ). Thin Metzenbaum scissors are then used to separate the overlying skin from the underlying lower lateral cartilages, nasal domes, and infratip lobule (intermediate crura). Finally, the alar cartilages are delivered with a single hook and supported with Metzenbaum scissors ( Figure 6-4 ). In this fashion, each dome is assessed and recontoured individually.

Figure 6-3

High septal transfixtion or complete transfixtion incision.

Figure 6-4

Delivery of lower lateral cartilage/Dome (LLC) with single hook and supported with Metzenbaum scissors.

The first step in achieving improved tip definition is the removal of fibrofatty tissue between the domes. This allows greater approximation of the two alar domes. An intact or a complete strip can be performed next by excising the cephalic portion of the lateral crura ( Figure 6-5 ). This achieves both volume reduction and improved supratip definition. It is essential to preserve at least a 7- to 9-mm width of cartilage. In a few select cases, this may be all that is required and the cartilages may be replaced in situ. In most cases, however, other techniques are required to achieve satisfactory tip definition and symmetry.

Mar 23, 2019 | Posted by in OTOLARYNGOLOGY | Comments Off on Primary Endonasal Rhinoplasty: Double-Dome Technique via Intercartilaginous Dome-Delivery

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