Back to Authors

Hamilton, Grant

https://orcid.org/0000-0001-8445-0575

Mayo Clinic

Mayo Clinic

Citations 35

The Effect of Vibrissae on Subjective and Objective Measures of Nasal Obstruction
Stoddard, David G. , Pallanch, John F., Hamilton, Grant

American Journal of Rhinology & Allergy | September 10, 2015 | Volume: 29 | Issue: 5 | Pages: 373-377

10.2500/ajra.2015.29.4209 Get It

Background Nasal congestion and/or obstruction represents a prevalent and extensively studied problem. No published research exists that describes the impact of nasal hair (vibrissae) on nasal obstruction. Objective To assess the impact of nasal vibrissae on subjective and objective measurements of nasal obstruction. Methods In this prospective study, 30 healthy participants without nasal symptoms were assessed for baseline vibrissae density and were treated with a topical decongestant. The subjects were then asked to subjectively assess nasal breathing by using four questions from the Nasal Obstruction Symptom Evaluation instrument before undergoing rhinomanometry. Nasal vibrissae were then trimmed, and the participants repeated the subjective and objective assessments. Pre- and postintervention outcomes, including symptom scores, nasal airflow, and resistance, were compared by using statistical analysis. Results Statistically significant improvement was noted in subjects’ nasal airway specific symptom scores and in objective measurements of their nasal airway. Patients with moderate or many vibrissae at baseline were noted to have greater likelihood of improvement in subjective and objective obstruction assessments than patients rated with few. Conclusion In these 30 subjects, statistically significant improvement occurred in both subjective and objective assessments of nasal obstruction, particularly in patients with greater density of vibrissae. These findings support further study of the potential benefit of the reduction of vibrissae density in some patients with nasal obstruction.
Healing Septal Perforations by Secondary Intention Using Acellular Dermis as a Bioscaffold
Sharma, Ayushman , Janus, Jeffrey R. , Diggelmann, Henry R., Janus, Jeffrey, Hamilton, Grant

Annals of Otology, Rhinology & Laryngology | December 22, 2014 | Volume: 124 | Issue: 6 | Pages: 425-429

10.1177/0003489414565002 Get It

Objective: Several techniques are described in the literature for nasal septal perforation repair. Most of these involve interposition grafts in conjunction with local pedicled mucosal flaps. The following article describes our experience using acellular dermis as a bioscaffold to support the regrowth of nasal septal mucosa by secondary intention. Methods: Retrospective chart review of all patients who underwent repair of nasal septal perforations by the senior author using acellular dermis placed between the 2 sides of the perforation and covered with silastic splints to allow for mucosalization. Results: Thirteen patients underwent nasal septal perforation repair using this technique. All perforations repaired were under 2 cm in greatest dimension. Two-thirds of patients had complete closure of the perforation upon initial use of bioscaffolding technique. The remaining third achieved near-total closure with bioscaffolding technique and were able to be completely closed with a single additional procedure. Conclusions: Acellular dermis offers an alternative to most currently described complex flaps. The method can be used in patients with defects less than 2 cm, but initial data suggest caution when using in those with wound healing impediments. This technique is also an excellent choice for patients with multiple small septal perforations.
Endoscopic Forehead Approach for Minimally Invasive Benign Tumor Excisions
Sadick, Haneen, Huber, Michael , Perkins, Stephen W., Waters, Heather H., O’Reilly, Ashley G., Gassner, Holger G., O'Reilly, Ashley G, Hamilton, Grant

JAMA Facial Plastic Surgery | June 19, 2014 | Volume: 16 | Issue: 5 | Pages: 352-358

10.1001/jamafacial.2014.269 Get It

Importance Direct transcutaneous resection has been a widely accepted standard for the removal of benign forehead lesions. In recent years, the endoscopic approach has become more prevalent because of its noninvasiveness. To date, only a few studies with limited case numbers have reported on this technique. We report our findings from one of the largest cohorts of patients undergoing tumor resection of the forehead via the endoscopic approach. Objectives To evaluate results of the endoscopic forehead approach for benign tumor excisions, to give a more nuanced insight into this procedure, and to discuss technical pearls and potential pitfalls from our experience. Design, Setting, and Participants Multicenter, retrospective case study at 2 university centers and 1 private practice among 36 patients aged 18 to 72 years (mean age, 44 years) who underwent the endoscopic forehead approach for benign tumor resections. Main Outcomes and Measures Symptoms at presentation, surgical procedure and duration, type of lesions, intraoperative and postoperative complications, recurrences, and patient satisfaction. Results In total, 34 patients had an asymptomatic forehead mass, while 2 patients reported discomfort and headache. Among all patients, complete tumor excision was achieved endoscopically. The mean operative time was 36 minutes. Histopathological examination revealed 18 lipomas, 13 osteomas, 2 dermoid cysts, and 1 bone fragment after previous rhinoplasty. In 2 patients, no specimen was submitted. No hematomas, infections, scalp numbness, contour irregularities, temporal branch paralysis, or tumor recurrences occurred. One patient had a prolonged area of alopecia, which resolved on its own. All patients attested to a high satisfaction rate. Conclusions and Relevance The endoscopic approach offers excellent aesthetic results and allows for safe tumor removal. It has proven to be an effective and minimally invasive alternative to the conventional open approach. Level of Evidence 4 .
Digital imaging analysis to assess scar phenotype
Smith, Brian J., Nidey, Nichole , Miller, Steven F. , Uribe, Lina M. Moreno , Baum, Christian L. , Wehby, George L. , Smith, Brian J., Hamilton, Grant , Dunnwald, Martine

Wound Repair and Regeneration | March 17, 2014 | Volume: 22 | Issue: 2 | Pages: 228-238

10.1111/wrr.12141 Get It

AbstractIn order to understand the link between the genetic background of patients and wound clinical outcomes, it is critical to have a reliable method to assess the phenotypic characteristics of healed wounds. In this study, we present a novel imaging method that provides reproducible, sensitive, and unbiased assessments of postsurgical scarring. We used this approach to investigate the possibility that genetic variants in orofacial clefting genes are associated with suboptimal healing. Red‐green‐blue digital images of postsurgical scars of 68 patients, following unilateral cleft lip repair, were captured using the 3dMD imaging system. Morphometric and colorimetric data of repaired regions of the philtrum and upper lip were acquired using ImageJ software, and the unaffected contralateral regions were used as patient‐specific controls. Repeatability of the method was high with intraclass correlation coefficient score > 0.8. This method detected a very significant difference in all three colors, and for all patients, between the scarred and the contralateral unaffected philtrum (p ranging from 1.20−05 to 1.95−14). Physicians’ clinical outcome ratings from the same images showed high interobserver variability (overall Pearson coefficient = 0.49) as well as low correlation with digital image analysis results. Finally, we identified genetic variants in TGFB3 and ARHGAP29 associated with suboptimal healing outcome.
The Use of Open-Cell Foam and Elastic Foam Tape as an Affordable Skin Simulator for Teaching Suture Technique
Janus, Jeffrey R. , Hamilton, Grant

JAMA Facial Plastic Surgery | July 24, 2013 | Volume: 15 | Issue: 5 | Pages: 385-387

10.1001/jamafacial.2013.137 Get It