Face lift dissections are believed to compromise skin flap circulation, leading to wound healing complications in some cases. A local anesthetic agent with epinephrine may be injected to reduce bleeding. Limited information is available regarding the appropriate dose and efficacy. Hematomas have been attributed to rebound bleeding.
Laser fluorescence imaging is the most advanced method available to evaluate skin perfusion. This method has been used to quantitate blood supply during free-tissue transfers,1 breast reconstruction,2–5 and abdominoplasty.6–8 To the author’s knowledge, this technology has not been applied to face lifts.
This study was undertaken to evaluate (1) the degree of vascular compromise associated with a face lift dissection, if any, and (2) the effect of 2 concentrations of epinephrine on vascularity.
PATIENTS AND METHODS
Nine consecutive patients undergoing face lifts performed by the author were asked to participate in the study. The only inclusion criteria were face lift surgery and patient consent. There were no exclusion criteria. All patients consented (inclusion rate, 100%). Institutional review board approval was obtained from Chesapeake Institutional Review Board Services, accredited by the Association for the Accreditation of Human Research Protection Programs.
Local Anesthesia and Epinephrine Doses
The author’s usual face lift local anesthetic solution combines 50 mL of 0.5% bupivacaine with 1:200,000 epinephrine, 50 mL of 1% lidocaine with 1:100,000 epinephrine, and 100 mL of normal saline (total volume, 200 mL) for a final epinephrine concentration of 1:300,000.9 For study purposes, another solution was prepared, containing the same local anesthetic concentrations but an epinephrine concentration of 1:800,000 (Fig. 1) and a third solution containing no epinephrine. These epinephrine concentrations were chosen based on existing clinical10 and experimental data11 documenting efficacy in concentrations as dilute as 1:800,000. The first patient in the series received the 1:300,000 concentration of epinephrine. The second patient received the more dilute 1:800,000 concentration (See Video, Supplemental Digital Content 1, which demonstrates the local anesthetic injections, https://links.lww.com/PRSGO/A123), and the third patient received no epinephrine. The sequence was repeated chronologically by the date of surgery. The mean volume of local anesthetic solution was 74 mL per side (range, 60–85 mL), with no significant difference in volumes among the 3 patient groups.
All procedures were performed at a state-licensed ambulatory surgery center under total intravenous anesthesia using a laryngeal mask airway. No inhalational agent was given. No intraoperative hypotension or routine preoperative antihypertensive agent was administered, apart from any blood pressure medication taken regularly by the patient. All patients were treated with sequential compression devices. No patient received chemoprophylaxis. All patients underwent Doppler ultrasound scans of the lower extremities before surgery, the day after surgery, and approximately 1 week after surgery.12 Surgical drains were removed the day after surgery. Head dressings were not used.
Three patients underwent simultaneous procedures on the breasts or body. In 8 patients, a submental lipectomy was performed (1 patient had a previous submental lipectomy). Eight patients underwent adjunctive facial procedures, including fat injection (n = 7), endoscopic forehead lift (n = 6), laser skin resurfacing (n = 5), upper blepharoplasties (n = 3), rhinoplasty (n = 3), chin augmentation (n = 1), and setback otoplasties (n = 1). Adjunctive facial procedures (with the exception of upper blepharoplasties and otoplasties) were performed after the final imaging video so as not to interfere with perfusion measurements.
All patients were treated using the same face lift technique (See Video, Supplemental Digital Content 2, which demonstrates a face lift dissection. This video is available in the “Related Videos” section of the full-text article at http://www.PRSGO.com or available at https://links.lww.com/PRSGO/A124). The author uses no temporal incision, allowing skin redundancy to settle spontaneously and avoiding a temple scar. A subcutaneous dissection is used in the lateral neck (Fig. 2), with conservative liposuction over the lateral neck and sternocleidomastoid muscle. The author typically uses a “triple-vector platysmaplasty.” A deep-plane dissection is used to elevate the superficial musculoaponeurotic system (SMAS) and platysma (vertical, vector 1), with release of the retaining ligaments. The platysma is plicated laterally (oblique, vector 2). A submental incision is used to access the neck for anterior liposuction, interplatysmal fat resection, and a medial platysmaplasty (medial, vector 3).
The SPY Elite Intraoperative Perfusion System (Novadaq, Bonita Springs, Fla.) was used to image each side of the face and neck at least 20 minutes after injection of the local anesthetic solution on that side and before the face lift dissection. Immediately after completion of the face lift on each side, the patient was reimaged. Each patient was imaged 4 times. A video was recorded immediately after the contrast agent, indocyanine green, was injected intravenously (2.5 mL, 6.25 mg) and flushed with 10 mL of normal saline. (See Video, Supplemental Digital Content 3, which demonstrates SPY laser fluorescence imaging videos before and after face lift. This video is available in the “Related Videos” section of the full-text article at http://www.PRSGO.com or available at https://links.lww.com/PRSGO/A125). Measurements were made at the same time, 120 seconds after the start of the video recording. The temple was selected as the reference site. This site was used because it was just outside the injected area, not dissected, and it was within the field of view. Relative values were tabulated using this reference point.
Statistical analyses were performed using IBM SPSS for Macintosh version 22.0 (SPSS, IBM, Armonk, N.Y.). Paired t tests were used to compare measurements before and after the face lift. One-way analyses of variance were computed to compare the preoperative mean perfusion values across the 3 treatment groups. A P value < 0.05 was considered significant. A Pearson correlation was computed to determine the linear relation between epinephrine concentration and hematoma rate.
Patient data are provided in Table 1. Subjectively, the 3 patients who did not receive epinephrine appeared to have greater bleeding during the face lift dissection. Two of these women had extensive postoperative bruising (Fig. 3). Table 2 provides perfusion data, including both absolute and relative measurements. Individual and combined comparisons before and after the face lift showed no decrease in perfusion. Two of the individual site comparisons and the combined right face and neck measurements showed significantly (P < 0.05) greater absolute perfusion values after the dissection. An example of a patient who was not treated with epinephrine and her left face lift perfusion studies are provided in Figures 4–6.
Table 3 compares pre-face lift perfusion data for the 3 groups with different concentrations of epinephrine. For patients who did not receive epinephrine, the mean values for the combined right and left facial measurements were 103.4% and 100.8%, using the reference value of 100% assigned to the temple. For patients treated with 1:800,000 epinephrine (Figs. 7, 8), these combined values were 50.8% and 59.6%. For patients injected with an epinephrine concentration of 1:300,000 (Figs. 9, 10), the mean relative perfusion values were 52.3% and 51.6%. The differences in combined perfusion measurements did not reach statistical significance because of the small sample sizes. However, 4 of the individual site comparisons (2 absolute values and 2 relative values) were significant at P < 0.05, and one comparison of absolute values, the right submandibular site, was significant at P < 0.01.
There were 2 complications. One patient who received epinephrine 1:800,000 developed a hematoma of the right neck several hours after discharge requiring surgical evacuation. Another patient experienced weakness in the left buccal branch distribution that fully resolved within 1 month. There were no systemic complications. All ultrasound scans were negative.
Blood Flow after a Face Lift Dissection
The author expected a diminution in blood flow caused by the face lift dissection. However, the data did not support this hypothesis. All 4 combined absolute and relative postoperative perfusion measurements (right, 67.3% vs 60.5%; left, 74.7% vs 70.7%) were higher after surgery than before surgery, although not significantly (Table 2). There are several possible explanations. First, the dissection was subcutaneous over the lateral neck, but largely sub-SMAS in the face (Fig. 2). Second, the author uses hydrodissection13 in creating the subcutaneous tissue plane, which may be less traumatic to the skin flap.14 Third, lidocaine10,15–17 and bupivacaine18 produce local vasodilation, thought to be caused by a local chemical sympathectomy effect,17 which would not be balanced by the vasoconstrictive effect of epinephrine in the 3 patients who did not receive epinephrine. This vasodilation is overcome by epinephrine, producing net vasoconstriction,10,15–18 caused by the α-adrenergic effect of epinephrine on the smooth muscle of arterioles.15,19 The finding of excellent post-face lift flap perfusion is consistent with the author’s clinical experience of few cases of marginal skin loss.20
In an effort to control for any possible confounders (eg, room temperature, ambient lighting, and neurohormonal factors), the perfusion of the temple was used for reference. The mean measurements representing the combined data relative to the temple showed perfusion levels decreased by almost half (Table 3). The combined perfusion measurements for the 2 epinephrine concentrations were surprisingly similar, attesting to the efficacy of the more dilute epinephrine concentration. Similarly, Dunlevy et al,10 in their study using a laser Doppler flowmeter, found that a 1:800,000 concentration of epinephrine reduced cutaneous blood flow approximately 50% in patients undergoing head and neck surgery. These investigators10 also found that a 1:400,000 concentration decreased blood flow about 60%, with no significant difference in blood flow comparing epinephrine concentrations of 1:200,000 and 1:400,000. In their study of albino rabbits, Siegel and Vistnes11 found no significant difference in hemostatic effect comparing epinephrine concentrations of 1:100,000, 1:400,000, and 1:800,000; a concentration of 1:1,600,000 was significantly less effective. Previous studies show that the reduction in blood flow reaches a plateau between 5 and 10 minutes after epinephrine injection,10,15,16,18,19 although the maximum effect requires 25 minutes.17
Today, plastic surgeons use a variety of epinephrine concentrations, from 1:160,000 to 1:4,000,00014,20–41 (Fig. 11). Because epinephrine can produce toxic local (eg, skin necrosis)10,16,18,19 and systemic side effects (eg, tachycardia, arrhythmias, and hypertension)10,15,18 from stimulation of α- and β-adrenergic receptors,10,19 the prudent surgeon will choose the most dilute solution that provides adequate vasoconstriction. The measurements in this study suggest that 1:300,000 and 1:800,000 epinephrine concentrations are both effective.
Limited information is available regarding blood loss associated with a face lift. A surprisingly heavy blood loss is calculated from hematocrits when a face lift (including endoscopic forehead lifts) is performed at the time of body contouring surgery, approximately 500 mL.9 This nontrivial blood loss attests to the highly vascular nature of the face and the scalp. Hence, the need to minimize surgical blood loss and the role for vasoconstriction.
To gauge the frequency of hematomas, the author reviewed 40 face lift studies published in the plastic surgical literature in the last 15 years,14,20–58 including fluid collections treated with needle aspiration when they were reported. The mean hematoma rate was 3.8%. This rate is more than twice the frequency of this complication in a recent review59 that did not include hematomas treated with needle aspiration or seromas when these fluid collections were reported separately. The mean frequency of hematomas reported in the 6 prospective studies20,28,31,47,48,56 was 6.7%.
Approximately 86% of hematomas develop within 24 hours of surgery.27,60 Some plastic surgeons recommend against using epinephrine.25,32 The theory is that bleeding is suppressed during surgery but occurs postoperatively after the vasoconstrictive effect of the epinephrine wears off. However, there is no significant correlation between epinephrine concentration and reported hematoma rates (Fig. 11). Most surgeons take a “second look”61 for hemostasis after the face lift repair and before skin closure. Nevertheless, hematomas occur even in patients treated by experienced plastic surgeons paying meticulous attention to hemostasis.13
Perhaps unfairly, patients may judge the extent of bruising as an indication of the degree of surgical trauma. Without epinephrine, the local vasodilatory effect of lidocaine is unopposed,10,15–18 increasing bruising and delaying patient recovery (Fig. 3). Epinephrine also serves to reduce the rate of systemic absorption of local anesthetic agents, reducing the risk of systemic toxicity.9
Many plastic surgeons advocate close control of blood pressure during surgery and postoperatively, including the use of clonidine.14,25,27,34,38,58,62 Although avoidance of hypertension is always advisable,59 the value of intraoperative hypotension is less clear.53,60 Local vasoconstriction is preferred to systemic hypotension to reduce blood loss. Moreover, intraoperative hypotension might be expected to increase the risk of rebound bleeding after surgery. Feldman41 takes the opposite approach, administering intravenous ephedrine to elevate the patient’s blood pressure during surgery, “so that the final look for hemostasis is a reliable one.” However, vasoactive medications can interfere with the reliability of pulse, blood pressure, and respiratory rate when titrating propofol and fentanyl doses. To ensure the validity of these important clinical indicators, the author prefers normotensive anesthesia. When pain and a full bladder are ruled out as causes of intra- or postoperative hypertension, antihypertensives may occasionally be administered (eg, labetalol, esmolol, and hydralazine). The incidence of postoperative nausea and vomiting, which can raise the blood pressure, may be reduced by using a propofol infusion rather than anesthetic gas9,27 and by routinely administering antiemetics.9,34,58,59
Choice of Local Anesthesia
Most plastic surgeons use lidocaine for local anesthesia, usually in a concentration of 0.5% (range, 0.25–1%).14,20–24,26,27,30,31,33,36,38–40,60 Other investigators use bupivacaine either on its own29,35,63,64 or with lidocaine.14,20,25,28,31,62 Bupivacaine has a greater potency and duration of action than lidocaine.9 Its safety has been documented when administered into the subcutaneous tissue in dilute concentrations and when combined with lidocaine.9 Postoperative analgesia is helpful in reducing the need for analgesic medication in the immediate postoperative period. Narcotic analgesics are a common cause of nausea and vomiting; their use should be minimized.21 The longer duration of action of bupivacaine makes it frequently possible to evacuate a hematoma several hours after surgery without the need for a general anesthetic or additional local anesthesia. Hematomas are less onerous when they can be treated without a return trip to the operating room and without the need for another general anesthetic.
Limitations of the Study
The sample size was small, comprising only 9 patients. It is not feasible to study a large number of patients because this sophisticated imaging technology is expensive and there is no third-party payer. The cost of each study was $1300, representing the cost of each dye kit, borne by the author. Nevertheless, in view of the higher (not lower) perfusion values after surgery, it is doubtful that a significant decrease in tissue perfusion would be detected if the sample sizes were larger. There is subjectivity in assigning measurement sites and variability of perfusion measurements, although this problem is largely mitigated by combining measurements. This study provides no information on smokers, male patients, other face lift techniques, or the duration of vasoconstriction.
Strengths of the Study
A novel imaging method provides data that were previously unavailable. Eighteen before-and-after perfusion studies were possible because the procedure is bilateral. Importantly, patients served as their own controls, avoiding confounders that can affect comparisons in different patients. The same surgeon used the same technique in this prospective study of consecutive patients with a 100% inclusion rate, avoiding selection bias and adding to the reliability of the conclusions.
A deep-plane face lift dissection does not decrease skin flap perfusion (See Video, Supplemental Digital Content 4, which demonstrates a comprehensive video showing patient interviews before and 24 hours after surgery, local anesthetic injection, face lift dissection, and SPY laser fluorescence imaging videos. This video is available in the “Related Videos” section of the full-text article at http://www.PRSGO.com or available at https://links.lww.com/PRSGO/A126). Both 1:300,000 epinephrine and 1:800,000 epinephrine concentrations are effective in producing intraoperative vasoconstriction.
The author thanks Jane Zagorski, PhD, for statistical analysis, Sarah Maxwell, RN, for data collection, and Gwendolyn Godfrey for illustrations.
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