A New Method That Uses Cyanoacrylate Tissue Adhesive to Fill Scoring Incisions in Septal Cartilage Correction

Transcription

1 The Laryngoscope VC 2011 The American Laryngological, Rhinological and Otological Society, Inc. A New Method That Uses Cyanoacrylate Tissue Adhesive to Fill Scoring Incisions in Septal Cartilage Correction _Irfan Özyazgan, MD; Onurkan _ Idacı, MD Objectives/Hypothesis: Numerous methods are used in the correction of deviated septal cartilage. One of these methods is to perform partial-thickness incisions (scoring) on the concave side of the deviated cartilage. In this retrospective report, we present a series of patients who were treated by filling the scoring incision gaps with cyanoacrylate-based tissue adhesives to increase the effectiveness of scoring incisions and to maintain stability of the corrected concave cartilage segments. Study Design: A retrospective clinical study presenting a patient group who was treated using a new surgical method for septal deviation. Methods: Twenty-three patients with septum deviation and nasal deformity underwent surgery with the open rhinoplasty approach. Intra- or extracorporeal scoring incisions were performed on the concave side of the deviated septal cartilage, and cyanoacrylate tissue adhesives were applied to the incisions of the corrected cartilage. After polymerization and hardening of the cyanoacrylate tissue adhesive, the operation continued in the normal manner. Preoperative and postoperative clinical results and computed tomography images of the patients were assessed. Results: With a mean 24-month follow-up, all patients with respiratory complaints related to deviated septum reported improvement in nose breathing. Clinical and radiologic observations showed that the corrected septum was stable in its new position. There were no complications arising from the use of cyanoacrylate. Conclusions: Cyanoacrylate is an effective, instant, safe method of treatment in correcting deviated septal cartilage with scoring incisions and filling the gaps of the incisions. Key Words: Cyanoacrylate, scoring incision, septal deviation. Laryngoscope, 121: , 2011 INTRODUCTION Many different treatment modalities are used for correcting septal cartilage fractures and deviations. Regardless of which treatment is preferred, one of the main concerns is to maintain the nasal support of the septum by preserving the septal cartilage as much as possible. 1 The remaining dorsal and caudal septal cartilage must be at least 8- to 10-mm wide after correction. 2 Scoring is a well-known method used for giving shape to the septal cartilage. 3,4 Scoring incisions are partial-thickness incisions made on the concave surface of the cartilage. Correction of bent septal cartilage by using scoring incisions and holding it in place for support is a method used in the treatment of septal deviation. 2,5 The efficiency of incisions depends on the deviation rate of the cartilage and the depth of the incisions. Deeper incisions cause obtuse bending angles of the cartilage. 3 However, excessively deep incisions From the Department of Plastic, Reconstructive and Esthetic Surgery, Erciyes University, Faculty of Medicine, Kayseri, Turkey. Editor s Note: This Manuscript was accepted for publication January 11, This study was partially presented at the 31st National Plastic, Reconstructive and Esthetic Surgery Congress, Adana, Turkey, October 17 21, The authors have no funding, financial relationships, or conflicts of interest to disclose. Send correspondence to Dr. _ Irfan Özyazgan, Erciyes University Faculty of Medicine, Department of Plastic, Reconstructive and Esthetic Surgery, Melikgazi, Kayseri, Turkey. ozyazgan@erciyes.edu.tr DOI: /lary could result in damage to the integrity of the cartilage and weaken it. In contrast, scoring incisions that are not sufficiently deep are inadequate for the preferred correction. In this patient series report, use of cyanoacrylate (CA)-based tissue adhesive application to increase the efficiency of scoring incisions and to prevent concavity recurrences in septal deviation treatment is presented. MATERIALS AND METHODS Medical records of patients who were referred to Erciyes University Faculty of Medicine, Department of Plastic, Reconstructive, and Esthetic Surgery, with septum deviation and nasal deformity between January 2004 and February 2009 were retrospectively evaluated; among these, 23 patients (17 men, 6 women) who were treated with scoring incisions and CA tissue adhesives were analyzed. The mean age of the patients was 43.6 (range, 19 63) years. In addition to routine preoperative assessments, axial and coronal computed tomography images were obtained for all patients. Surgery was performed using the open rhinoplasty technique with general anesthesia. The surgical technique was briefly as follows: After a submucosal injection of a local anesthetic solution containing half diluted 10% lidocaine and 1/ 100,000 adrenaline, subperiosteal and subchondral dissections were performed to expose the cartilaginous and bony septum. The deviated bony septum and crest were resected. Rotated cartilaginous septum in the area of the nasal crest or excessively thickened, folded septum was also excised. In some patients, if stabilization of the remaining septal cartilage could not be maintained in its anatomic position or the connection with bony structures was deficient or if the cartilaginous septum was

2 Fig. 1. Upper left, A hingelike deviated septal cartilage to be corrected extracorporeally; upper right, deviated septal cartilage after scoring in different directions and the excision of parts that were not usable or necessary to the protect septal support; lower left, holding the cartilage in overcorrected position while waiting for polymerization of the glue; lower right, the corrected cartilage. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] excessively deformed, the septal cartilage was removed, and the correction was achieved extracorporeally. In other patients, the septal cartilage correction procedure was performed in vivo. In conditions in which the cartilaginous septum was partially resected, the surgeon paid attention to keep the remaining cartilage as an L strut with at least 10 mm of dorsal septum and 10 mm of caudal septum to maintain the stability of the cartilaginous framework. In aforementioned cases where manipulations after releasing the septal cartilage from deviated bony septum were not sufficient to correct the septum or in those cases in which excessively concave septum (like a thumb impression) was present, scoring incisions were made and modified by combining CA glue for treatment. Scoring and CA Usage Incisions were made with a scalpel to the concave surface of the septal cartilage, in approximately half the thickness of the cartilage. The cartilage surface was cleansed of blood and other liquids before the procedure. The CA adhesive, N-butyl-2- cyanoacrylate þ methacryloxysulfolane (Glubran; GEM, Viareggio, Italy) or N-butyl-2-cyanoacrylate (Liquiband; MedLogic Ltd, Devon, England), was applied to the concave side of the cartilage while holding it in a slightly overcorrected position. The choice of glues was not made intentionally; they were used according to availability of hospital resources. Glubran VR was used in the first six patients, and Liquiband VR was used in the remaining 17. When the adhesive was applied to one end of the incision, the low viscosity of the adhesive made it easy for it to flow to the other end. After approximately 35 to 40 seconds of curing time, cartilages were kept untouched to control the shape and the effectiveness of the procedure. Scoring incisions were usually performed in two perpendicular directions because the majority of these deviations did not occur in a one-way direction and did not display flexion hinge activity. These deviations appeared like a concavity made by finger pressure and needed at least two directional multiple scoring incisions. CA adhesives were carefully applied to the incisions with maximum attention to prevent them from overflowing. This procedure was performed to both sides in cases in which undulations had resulted in concavities in both sides (Figs. 1 6). In addition, in the last patient in the study, adhesives were scraped off with a scalpel when overflow was noticed. This procedure did not affect the shape of the corrected cartilage. In the extracorporeal correction procedure, cartilages were put into place and fixed by suturing to both the upper lateral cartilages and to the nasal spine. After the incisions were closed, silicone intranasal splints with airway passages were placed and secured with transfixion sutures, and the operation was finished after nasal packing. Nasal packs were removed 24 hours postoperatively. Intranasal splints were taken out after 2 weeks. RESULTS Follow-up interval in these patients ranged from 11 to 62 months (mean follow-up interval was 24 months), and postoperative computed axial and coronal tomography images of some patients were obtained. One patient required a rhinoplasty procedure for cosmetic reasons 8 months after the operation. A biopsy was obtained from the region where scoring and CA (Glubran VR ) had been applied during the first operation. There were no abnormalities in the macroscopic analysis of the biopsy 1165

3 Fig. 2. Heavily deviated septal cartilage before (left images) and after (right images) extracorporeal use of defined method. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary. com.] Fig. 3. Another heavily deviated and S-shaped septal cartilage before (left images) and after (right images) extracorporeal use of defined method. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] 1166

4 Fig. 4. Left, deviated septal cartilage; middle, intracorporeal scoring incisions made on the concave side of the cartilage in different directions; right, overcorrected septal cartilage after CA application to scoring incisions. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] material. In the histopathologic examination of the cartilage, there were no remnants of the CA adhesive or any trace of scoring incisions. In addition, it was determined that the cartilage tissue was completely normal in form. A biopsy of scored and CA (Liquiband VR )-applied septal cartilage was also obtained from another patient who underwent surgery for similar reasons 8 months after the first operation. In examination of the histopathologic material, the cartilage structures were assessed as completely normal, and scoring incisions were observed in various areas of the examination field. CA glue could be seen in some areas of the incisions, whereas in other areas it had disappeared (Fig. 7). All surgical operations were performed by the first author ( _ I.Ö.). In all patients, relief from respiratory complaints related to a deviated septum was reported by the patients after surgery. Clinical and radiologic observations showed that the corrected septum was stable in its new position (Fig. 8, 9, 10). There were no complications arising from use of CA. DISCUSSION The idea of using CA glue by combining scoring incisions was realized during a septal deviation operation after observing that the blood had filled the incisions. Because there were similar experiences cited in the literature with regard to the use of CA in cartilage surgery, we hypothesized that a rigid material instead of blood could help to preserve the scoring incisions in opened position, and we considered CA glue. CA polymer adhesives are appealing, inexpensive, easy to apply, biocompatible, and bioresorbable materials. In this group of adhesives there are products such as methylcyanoacrylate, ethylcyanoacrylate, isobutylcyanoacrylate, butylcyanoacrylate, and octylcyanoacrylate. The glue is rapidly polymerized in the presence of moisture. In the presence of water or blood, it ionizes and degrades to form cyanoacetate and formaldehyde, which are dissolved by the tissues. Bonding soft tissues is one of the areas of medicine in which CA glue is used. It provides superficial wound closure, and the results in healing are comparable with wounds closed by suture approximation. 6 It can also fasten lacerated nerves, thus preventing subsequent neuroma formation, and anastomose blood vessels. 7 In addition, several researchers have successfully used glue to construct cartilaginous nasal support in augmentation rhinoplasty 6,8 and for cartilage graft fixation There are numerous experimental and clinical studies assessing the effects of CA on cartilage healing. 9,10 17 All of these studies, except the study of Toriumi et al., showed that CA does not have any negative effects on the cartilage. 6,8 13,15 17 In the study of Toriumi et al., CA glue was applied to the subdermal plane of rabbit ears; the authors found that butyl-2-cyanoacrylate increased inflammation and caused foreign body giant cell response when it touched Fig. 5. Left, deviated septal cartilage; right, corrected septal cartilage after cyanoacrylate application to scoring incisions. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] 1167

5 Fig. 6. Extracorporeally corrected septal cartilages before (left images) and after (right images) correction procedure with scoring incisions and cyanoacrylate application belonging three different patients in each line. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] Fig. 7. Histopathologic appearance of biopsied cartilage, which had been scored and glued with cyanoacrylate, 8 months after surgery. Perpendicular scoring incisions and some cyanoacrylate residues along the incisions are seen (hematoxylin and eosin, 100). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary. com.]

6 Fig. 8. Preoperative (left images) and postoperative (right images) appearance and coronal computed tomography images of a patient treated with the defined method. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] well vascularized soft tissues. 14 However, the authors also stated that this does not mean that CA will necessarily cause inflammatory exudation and tissue necrosis in clinical practice. In fact, our experience agrees with that of Toriumi et al. with regard to applying CA under a thin tissue layer. There were no such reactions in the clinical findings of our patients; these findings confirm not only the study of Toriumi et al. 14 but also those of other authors. 6,8 13,15,17 Harris et al. were the first to use CA tissue adhesive on cartilage inclination. 18 In their study, the authors researched the effects of local (central or peripheral cartilage pieces) and surrounding factors (hypertonic or hypotonic) on the spontaneous bending of bars prepared from cadaveric costal cartilage. They painted both sides of these bars with a CA glue to prevent them from bending. In this study, CA glue could not prevent cartilage from bending. To the best of our knowledge, there is no other study on CA and cartilage deviation in the literature. Forces causing septal deviation can be intrinsic (depending on cartilage growth and development or later cartilaginous injury) or extrinsic (deviation of nasal pyramid, vomer, perpendicular plate of ethmoid or maxillary crest). 2 Release of extrinsic forces may allow correction of the cartilaginous septal deformity, whereas failure to achieve complete release contributes to recurrence. Intrinsic deviating forces must be overcome by weakening the cartilage or by overwhelming the deforming forces with sutures or grafts. 2 There are many different methods practiced in the correction of septal cartilaginous deformities and 1169

7 Fig. 9. Preoperative (left images) and postoperative (right images) appearance and axial computed tomography images of a patient treated with the defined method. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] deviations. 2,5,12,19 22 In some of these methods, sutures are used to correct the deviation. 2,19,22 For example, Mustardé-type suture usage, which was principally described for prominent ear treatment, is one possible choice to correct the concave side of the deviation. 22 Another method used to support sutures in correcting deviated septal cartilage is to employ different materials alongside the cartilage as a splint to straighten it. The best example of this kind is the practice of using suitable septum-derived cartilage grafts as batten grafts. Another practice of autologous splintage is using the ethmoid bone obtained from the operation site. Metzinger et al. described the ethmoid bone sandwich graft, in which small bone grafts are placed on each side of the caudal 1170 septum to maintain it in the midline. In that limited study, eight of 10 patients maintained satisfactory correction of their caudal defect. 21 Another method is to use absorbable synthetic foils that sandwich septal cartilage and protect the septum with splint effect in vivo. 20 In all these methods, the intrinsic forces are overcome by using sutures and/or grafts, which are applied after the elimination of extrinsic deviation factors essential in the correction of deviated septal cartilage. Another method of releasing the intrinsic forces of septal deviation is to weaken the cartilage or manipulate areas subject to the intrinsic forces with scoring incisions. Fry applied scoring incisions to one side of the cartilage, and this affected the interlocked stresses of the

8 Fig. 10. Preoperative (left images) and postoperative (right images) axial and coronal computed tomography images of a patient treated with the defined method. cartilage and made it bend to the other side. 4 As a result, the method became standard procedure in the correction of septal deviation. 2,3,5,23,24 However, some drawbacks have arisen in regard to scoring incisions. For example, Yang et al. suggested that the correction effect of scoring incisions is hard to predict for the following reasons 25 : 1) The deviated septum is corrected differently according to the incision depth; 2) The deviation does not develop only in a horizontal or vertical plane; 3) The thickness of the cartilage varies among individuals; and 4) There are also histologic differences in the cartilage according to the age of patients. Pirsig claimed that the resultant shape of the cartilage after scoring incisions could vary for the following reasons 23 : 1) biomechanical properties of septal hyaline cartilage; 2) bilaterally attached mucoperichondrium; 3) scarring after wound healing; and 4) proficiency of the surgeon. Therefore, the long-term results of cartilage scoring are expected to be variable. 3 In addition to the effectiveness of scoring incisions, the validity of biomechanical rules on reconstruction of nasal septal cartilage is also questioned. 1 Another point to keep in mind concerning scoring incisions is that if they are too deeply applied or if the cartilage is not sufficiently thick, these incisions can weaken the septal cartilage and thus result in a possible decrease in septal cartilage support. Fig. 11. Left, Wedge-shaped cyanoacrylate filling the scoring incision applies an opening force perpendicular to the incision (cross-sectional schematic appearance perpendicular to the incision). Right, The same cyanoacrylate that fills the incision also exerts an opening force parallel to the incision. 1171

9 We consider that a combination of scoring incisions and CA tissue adhesives such as we have used will eliminate the described drawbacks. According to results of our series, because filling the gaps of the scoring incisions with CA partially ensures the integrity of the cartilage, the described weakening of the cartilage is eliminated. In an experimental study on rabbit septal cartilage, Ten Koppel et al. indicated that the depth of incisions is important in regard to cartilage bending. 3 They also noted that the in vivo regulation of incision depth is difficult. In fact, we had similar experiences in our clinical applications. CA usage maintains the correction even if the depth of the incision is not satisfactory. While the cartilage is held in a corrected position, incisions are filled with CA, and polymerization and hardening of the adhesive prevents the closure of the incisions. Like a choke, hardened CA prevents the incised cartilage from returning to its previous shape. Furthermore, in cases in which incisions are too deep, filling the scoring incisions with CA maintains the integrity of the cartilage; thus by forming a support, it prevents any undesirable effects resulting from excessively weakened cartilage. The gaps formed by scoring incisions are filled by fibrosis. 23 This tissue, which fills the incision gaps in the early stage of wound healing, may cause forces that could renew the concavity in this part of the cartilage. 23 Filling the incisions with CA in the early stages of wound healing could help prevent fibrotic tissue from forming in the gaps, causing a recurrence of the deviation. In fact, there is some speculation that CA adhesive will eventually be resorbed and that the resorption gaps may be filled with fibrosis, causing the same undesirable effect. This outcome may be a possibility, but we believe that the resorption process takes longer, and in this process, intrinsic forces of the cartilage will be rearranged according to the new shape of the cartilage. Furthermore, another possibility is that these potential cavities could be filled with a new cartilage tissue during the resorption process. This hypothesis is supported by the inspection of scored cartilage biopsies of two patients that displayed no other structure apart from mature cartilage taken 8 months after surgery in our study. The concavity correction method of filling scoring incisions with CA also has the advantage of possessing two different directional effects: 1) When looked at from the side, a perpendicular directional effect in the scoring incision occurs by filling a wedge-shaped cavity; and 2) The same directional effect with the scoring incision expands and flattens the surface (Fig. 11). It is impossible to achieve a secondary directional effect in other methods of deviation correction, such as suturing methods, batten grafts, or the use of scoring incisions alone. Ten weeks after scoring, the cartilage is stable in its corrected position 3 ; considering this case, it is possible to say that our average 24-month follow-up was sufficiently long to evaluate results. One of the advantages of this method is that it can be applied to cases that do not have supporting cartilage to use as a batten graft. In addition, it has been reported that using adhesives is faster and safer than suturing. 9 These factors also can be considered advantages of this procedure. CONCLUSION As a result, CA has a variety of possible uses, and we believe that using it with scoring incisions can eliminate the disadvantages encountered by applying scoring incisions alone. 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