Publications by authors named "Helen Merritt"

Fentanyl is commonly used in critically ill patients receiving extracorporeal membrane oxygenation (ECMO). Fentanyl's lipophilicity and protein binding may contribute to a sequestration of the drug in the ECMO circuit. Hydromorphone lacks these characteristics potentially leading to a more predictable drug delivery and improved pain and sedation management among ECMO patients.

View Article and Find Full Text PDF

Purpose: Define incidence of severe ocular trauma in orbital fracture patients and determine if ocular signs and symptoms are useful predictors of severe ocular injuries.

Methods: Retrospective chart review was performed on all patients with orbital fractures between April 1, 2013, and December 31, 2014. Patients were included if they had radiographic evidence of acute fracture of at least one orbital wall and were evaluated by the Ophthalmology service.

View Article and Find Full Text PDF

Purpose: To describe a case of orbital apex syndrome as a result of isolated bacterial sinusitis.

Observations: A 63-year-old woman presented with an orbital apex syndrome from isolated bacterial sinusitis with rapidly declining visual acuity to no light perception. We compared our case with 6 similar cases of severe vision loss from isolated bacterial sinusitis.

View Article and Find Full Text PDF

The management of blind, painful eyes in Sturge-Weber syndrome patients poses unique challenges to the oculoplastic surgeon. Intraocular and orbital vascular malformations and calcification may theoretically lead to unexpected hemorrhage and difficulty placing an implant in a calcified scleral shell. We present two cases of patients with Sturge-Weber syndrome with blind, painful eyes who underwent evisceration with silicone implant and discuss the relevant current literature.

View Article and Find Full Text PDF

We present a case of a 50-year-old woman with acute dacryocystitis that was complicated by posterior rupture of the lacrimal sac causing an orbital cellulitis with subsequent visual acuity of no light perception. Upon presentation, she was immediately started on broad-spectrum antibiotics and underwent surgical incision and drainage of the lacrimal sac abscess but never regained vision. There are 4 cases in the literature of permanent severe vision loss from acute dacryocystitis.

View Article and Find Full Text PDF

Erdheim-Chester disease (ECD) is a rare xanthogranulomatous disease in which orbital involvement can have devastating outcomes. Through a case report and review of the ophthalmic literature, we explore orbital findings, disease progression, and treatment options. Cases of orbital involvement in Erdheim-Chester disease were identified in the ophthalmic literature with a PubMed query and review of cited references.

View Article and Find Full Text PDF

Eyelid cancers account for 5% to 10% of all cutaneous malignancies. The incidence of eyelid cancer is approximately 15 cases per 100,000 individuals per year. Basal cell carcinoma is by far the most common cutaneous malignancy in the periocular area; other cutaneous malignancies that occur in this area include, in decreasing order of frequency, squamous cell carcinoma, sebaceous carcinoma, melanoma, and Merkel cell carcinoma.

View Article and Find Full Text PDF

Benign mesenchymal tumors of the craniofacial complex present unique challenges for orbital surgeons because of their potential for orbital compartment syndrome, ocular morbidity, and facial disfigurement and because definitive surgical management may be associated with significant morbidity. While the precise classification of such lesions depends on radiologic as well as histologic evaluations and remains controversial, benign tumors involving the bony walls of the orbit share features of bony expansion, facial deformity, and the potential to cause significant orbital and ophthalmic morbidity. We herein present 2 cases of benign mesenchymal tumors with bony involvement in the orbitofacial region (1 juvenile ossifying fibroma and 1 central giant cell granuloma) and review the current management of similar benign fibro-osseous and reactive bone lesions of the orbit.

View Article and Find Full Text PDF

For patients with metastatic or locally advanced eyelid and periocular carcinoma not amenable to surgical excision, targeted therapies have shown efficacy with better tolerability compared to cytotoxic chemotherapy. Overexpression of epithelial growth factor receptor was found in squamous cell carcinomas. Vismodegib targets the mutation in the hedgehog pathway identified in basal cell carcinoma and basal cell nevus syndrome.

View Article and Find Full Text PDF

Aims: To determine the number of excisions needed to achieve clear margins and the prognostic value of the 7th edition of American Joint Committee on Cancer (AJCC) classification for eyelid melanoma.

Methods: Retrospective chart review of consecutive patients treated for eyelid melanoma from January 2006 through May 2013 by the senior author at a tertiary care cancer centre.

Results: Of the 64 patients (25 men and 39 women), clear surgical margins were achieved with a single excision in 38 patients (62%), 2 excisions in 21 patients (34%), and 3 excisions in 2 patients (3%).

View Article and Find Full Text PDF

Merkel cell carcinoma (MCC) in the eyelid and periocular region can be treated surgically, in most cases, with preservation of the eye and reasonable visual function. Adjuvant radiation therapy, sentinel lymph node biopsy, and chemotherapy should be considered for MCC of the eyelid and periocular region, especially for larger tumors that are T2b or more advanced and lesions that present with regional nodal or distant metastasis.

View Article and Find Full Text PDF

This case report details the endovascular management of a large aortic pseudoaneurysm in a high-risk patient with a complicated history using a multi-disciplinary, hybrid approach. The pseudoaneurysm compressed the main pulmonary artery to 5 mm with near complete obstruction of the left main pulmonary artery, while also compromising the lumens of the left superior pulmonary vein and left main bronchus. Furthermore, the patient's left upper extremity arteriovenous dialysis fistula and bovine arch anatomy required a hybrid approach of repair that preserved the fistula while treating the aortic, pulmonary, and bronchial pathology.

View Article and Find Full Text PDF