Rachel K. Sobel
University of Iowa
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Featured researches published by Rachel K. Sobel.
Ophthalmic Plastic and Reconstructive Surgery | 2014
Rachel K. Sobel; Keith D. Carter; Richard C. Allen
Purpose: Etiologies of lacrimal obstruction requiring a dacryocystorhinostomy (DCR) have been reviewed previously but most commonly are thought to result from “primary acquired” nasolacrimal duct obstruction, a process of chronic inflammation in a narrowed duct. The authors have observed that secondary causes are frequently associated with bilateral lacrimal outflow disease. The purpose of this study is to investigate this relationship to help the clinician prioritize which patients to evaluate for secondary causes. Methods: This is a retrospective case-controlled review of patients who underwent bilateral DCR from 1986 to 2012 at this institution. They are compared with an age and gender-matched control group who underwent unilateral DCR. Statistical analysis was undertaken using the Pearson chi-square test for p value, except for age, which used the Wilcoxon rank sum test. Logistic regression was used for comparing prevalence of secondary issues in bilateral disease versus unilateral disease, with age as covariate. Results: Two hundred thirty-five patients underwent bilateral (91) or unilateral DCR (144). Twice as many patients undergoing bilateral DCR had an underlying secondary cause compared with the patients undergoing unilateral DCR. (38%, 19%, p= 0.001, odds ratio 2.59). In patients <50, the odds ratio of a secondary cause in bilateral disease would be 5.34 compared with patients older than 80. (p = 0.0002) Patients in the bilateral DCR group underwent revisions at more than twice the rate as patients in the unilateral DCR group (26%, 12%, p = 0.007). Conclusions: Ophthalmologists should have a high index of suspicion for secondary conditions underlying bilateral lacrimal outflow obstruction, especially in patients <50. These patients should undergo laboratory workup and intraoperative biopsy. They should also be counseled regarding a higher failure rate.
Ophthalmic Plastic and Reconstructive Surgery | 2015
Rachel K. Sobel; Nasreen A. Syed; Keith D. Carter; Richard C. Allen
Purpose:Optic nerve sheath fenestration (ONSF) has evolved since its inception in 1872. Surgical approaches include a lateral orbitotomy, a medial orbitotomy, or a superomedial lid crease. The actual fenestration can be done with slits or a window excision with biopsy. Each variation has its advantages and disadvantages. We describe the current preferences in surgical approach and biopsy for ONSF and examine the value of biopsy in patients who have undergone ONSF. Design:Eight-question survey and retrospective, noncomparative case review. Subjects:All American Society of Ophthalmic Plastic and Reconstructive Surgeons (ASOPRS) members are invited to participate in a survey and ONSFs from 1998 to 2013 at the University of Iowa Hospital and Clinics. Methods:Data from the survey was analyzed and patient records were reviewed. Main outcome measures:Preferred surgical approach, type of fenestration, and biopsy results. Results:Sixty-four percent of responding ASOPRS members (150/236) have not performed an ONSF in the last year. One third of that group has performed an ONSF in the last 5 years. Fifty-nine percent perform a medial; 10%, a lateral and 31%, a superomedial approach. Seventy-three percent perform a window fenestration, and about half of those surgeons send the specimen for pathologic evaluation. Anecdotally, some biopsies from surgeons who were surveyed have revealed new diagnoses. In a chart review of 90 cases of ONSF, no biopsy gave an unexpected result. Conclusion:The medial approach for ONSF is most common in our respondents; however, the superomedial lid crease incision is gaining popularity for its efficiency and elegance. Three quarters of surgeons remove a window and a quarter fenestrate with slits. Optic nerve sheath biopsy has limited diagnostic value. In the absence of any evidence to suggest a diagnosis other than idiopathic intracranial hypertension, the usefulness of biopsy during fenestration is low.
Ophthalmic Plastic and Reconstructive Surgery | 2015
Catherine J. Choi; Alain Bauza; Michael K. Yoon; Rachel K. Sobel; Suzanne K. Freitag
Purpose: To retrospectively review and describe full-thickness skin graft repair of lower eyelid cicatricial ectropion secondary to actinic skin. Methods: A retrospective, noncomparative chart review of all patients who underwent lower eyelid ectropion repair with placement of a full-thickness skin graft between June 2004 and March 2014 was conducted with IRB approval. The etiology of lower eyelid ectropion, demographics including age, gender, ethnicity, laterality, graft donor site, additional surgical procedures, graft viability, surgical success rate, complications, and clinical exam findings were summarized. Results: Twenty-nine eyelids in 24 patients underwent skin grafting for repair of cicatricial ectropion secondary to actinic skin changes. Ninety six percent of patients were male and 96% were Caucasian. Donor sites for skin grafts included upper eyelid (9, 31%), supraclavicular skin (9, 31%), postauricular skin (7, 24%), inner brachial skin (2, 7%), axilla (1, 3.5%), and preauricular skin (1, 3.5%). Twenty-four of 29 eyelids in the series underwent 1 or more additional procedures at the time of full-thickness skin grafting, including lateral tarsal strip (9 eyelids, 37.5%), punctoplasty (8, 33%), canthoplasty (7, 29%), excision of keratinized conjunctiva (2, 8%), transverse tarsotomy (1, 4%), ipsilateral external dacryocystorhinostomy (3, 12.5%), and lesion removal (1, 4%). There was 100% viability of the skin grafts. Overall surgical success rate was 76%, with asymptomatic recurrence rate of 17% and symptomatic recurrence rate of 7%. Conclusion: Repair of cicatricial lower eyelid ectropion secondary to actinic skin changes may be accomplished with full-thickness skin grafting, and is often performed in conjunction with additional procedures to fully address anatomic abnormalities.
Ophthalmic Plastic and Reconstructive Surgery | 2014
Thomas J.E. Clark; Lynette M. Renner; Rachel K. Sobel; Keith D. Carter; Jeffrey A. Nerad; Richard C. Allen; Erin M. Shriver
Purpose: To evaluate the prevalence of intimate partner violence (IPV) in a large population of female orbital floor fracture patients and provide recommendations on effectively identifying and referring IPV survivors. Methods: Retrospective review of facial fracture patients examined at the University of Iowa Hospitals and Clinics between January 1995 and April 2013. International Classification of Diseases, Ninth Revision, codes and medical record review were used to determine the prevalence of IPV victimization and clinical outcomes. Results: A total of 1,354 women and 4,296 men sustained facial fractures. Of these, 405 women and 1,246 men sustained orbital floor fractures. Leading mechanisms of orbital floor fractures in women were motor vehicle collisions (29.9%) and falls (24.7%). Twenty percent had no etiology documented. Intimate partner violence–associated assault was the third leading documented cause of orbital floor fractures in women (7.6%) followed by non–IPV-associated assault (7.2%). Among women with orbital floor fractures due to assault, leading patterns of injury included the following: isolated orbital floor fractures (38.7%, 12/31 in IPV patients; 55.2%, 16/29 in non-IPV patients), zygomaticomaxillary complex fractures (35.5%, 11/31 in IPV patients; 17.2%, 5/29 in non-IPV patients), and orbital floor plus medial wall fractures (16.1%, 5/31 in IPV patients; 24.1%, 7/29 in non-IPV patients). Involvement of ancillary services was documented in 20.0% (7 law enforcement and 5 social service agencies, 12/60) of assault-related orbital floor fracture cases. Ascertainment of patient safety was documented in 1.7% (1/60) of these cases. Conclusions: Ophthalmologists treating orbital floor fracture patients should maintain a high index of suspicion for IPV and screen accordingly. Following IPV disclosure, patient safety should be assessed and referral provided.
Ophthalmic Plastic and Reconstructive Surgery | 2015
Mack W. Savage; Rachel K. Sobel; Henry T. Hoffman; Keith D. Carter; Michael W. Finkelstein; Erin M. Shriver
Radioactive iodine has long been used in the treatment of cancers of the thyroid. While salivary complications secondary to I-131 therapy in association with xerophthalmia are well documented, there is little in the literature addressing simultaneous nasolacrimal duct obstruction with salivary gland dysfunction. The authors present 2 patients with epiphora from bilateral nasolacrimal duct obstruction and concurrent sialadenitis following I-131 ablation therapy for papillary thyroid carcinoma. These cases highlight the lacrimal and salivary duct complications resulting from I-131 therapy, introduce the possibility of a shared mechanism of damage, and demonstrate the availability of effective treatments for both conditions. Ophthalmologists see patients with epiphora from I-131 therapy and should be aware of the possible concurrent symptoms caused by salivary duct stenosis to make timely and appropriate referrals.
Ophthalmic Plastic and Reconstructive Surgery | 2014
Thomas J.E. Clark; Lynette M. Renner; Rachel K. Sobel; Keith D. Carter; Jeffrey A. Nerad; Richard C. Allen; Erin M. Shriver
Purpose: To evaluate the prevalence of intimate partner violence (IPV) in a large population of female orbital floor fracture patients and provide recommendations on effectively identifying and referring IPV survivors. Methods: Retrospective review of facial fracture patients examined at the University of Iowa Hospitals and Clinics between January 1995 and April 2013. International Classification of Diseases, Ninth Revision, codes and medical record review were used to determine the prevalence of IPV victimization and clinical outcomes. Results: A total of 1,354 women and 4,296 men sustained facial fractures. Of these, 405 women and 1,246 men sustained orbital floor fractures. Leading mechanisms of orbital floor fractures in women were motor vehicle collisions (29.9%) and falls (24.7%). Twenty percent had no etiology documented. Intimate partner violence–associated assault was the third leading documented cause of orbital floor fractures in women (7.6%) followed by non–IPV-associated assault (7.2%). Among women with orbital floor fractures due to assault, leading patterns of injury included the following: isolated orbital floor fractures (38.7%, 12/31 in IPV patients; 55.2%, 16/29 in non-IPV patients), zygomaticomaxillary complex fractures (35.5%, 11/31 in IPV patients; 17.2%, 5/29 in non-IPV patients), and orbital floor plus medial wall fractures (16.1%, 5/31 in IPV patients; 24.1%, 7/29 in non-IPV patients). Involvement of ancillary services was documented in 20.0% (7 law enforcement and 5 social service agencies, 12/60) of assault-related orbital floor fracture cases. Ascertainment of patient safety was documented in 1.7% (1/60) of these cases. Conclusions: Ophthalmologists treating orbital floor fracture patients should maintain a high index of suspicion for IPV and screen accordingly. Following IPV disclosure, patient safety should be assessed and referral provided.
Current Opinion in Ophthalmology | 2015
Elizabeth S. Esparaz; Rachel K. Sobel
Purpose of review The decision to stop or continue anticoagulants or antiplatelet therapy for oculoplastic procedures has long been a complicated and serious discussion for surgeons and their patients. Although other specialties have developed evidenced-based algorithms to guide their decision-making our subspecialty remains driven largely by anecdotal information. This article aims to get closer to an evidenced-based approach to perioperative anticoagulant and antiplatelet management. Recent findings Over the last few years, new antiplatelet and anticoagulant therapies are on the market with different characteristics in terms of half-life and mechanism of action. It is imperative the contemporary surgeon be well versed in these new medications. Also, new studies have emerged from the vascular literature with specific evidenced-based recommendations for heart and stroke patients. These guidelines need to be weighed with a patients cardiologist or neurologist. Summary The article will review the old and new anticoagulant and antiplatelet therapies as well as the recent literature for stroke and cardiac patients to guide the oculoplastic surgeon in this nuanced decision. It will also discuss current practice patterns in light of these new therapies and medical guidelines.
Current Opinion in Ophthalmology | 2012
Rachel K. Sobel; Keith D. Carter; Richard C. Allen
Purpose of review Periorbital edema is a common problem that deserves scrutiny. Although a variety of healthcare providers may see this clinical entity, ophthalmologists are often consulted along the way toward diagnosis. It can challenge even the most astute clinicians. A diagnosis may reveal merely a bothersome issue or potentially a sight-threatening or life-threatening problem. Recent findings Comprehensive reviews on this topic are scarce. Textbooks are brief. There are, however, many studies in the scientific literature of notable cases of periorbital edema. The causes generally fall into the categories of infectious, inflammatory or tumors, medication related, and postsurgical or trauma. Summary This article synthesizes the current literature on the topic with a case series from our institution. It aims to provide a thorough resource for all practitioners to make the prospect of triaging, diagnosing, and treating periorbital edema less daunting.
JAMA Ophthalmology | 2014
Amit K. Reddy; Meredith S. Baker; Rachel K. Sobel; David A. Whelan; Keith D. Carter; Richard C. Allen
IMPORTANCE Suicides and attempted suicides are major public health issues in the United States and around the world. Self-inflicted gunshot wounds (SIGSWs) are a common method of attempting suicide, the head being the most commonly injured body region; however, the literature lacks an overview of the orbital and ocular injuries as well as outcomes associated with SIGSWs. OBJECTIVES To characterize the ocular and orbital injuries and outcomes of patients presenting with SIGSWs and to examine the cost associated with these injuries. DESIGN, SETTING, AND PARTICIPANTS Retrospective medical record review was performed of all patients who presented to the University of Iowa Hospitals and Clinics between 2003 to 2013 with the admitting diagnosis of self-inflicted injuries via firearms. Patients with no periorbital or ocular injuries and/or those who did not survive for at least 2 months following the incident were excluded. MAIN OUTCOMES AND MEASURES Ocular injuries and outcomes and health care costs and reimbursements, which were generated by a financial report obtained from the hospital finance department that included data from both the hospital billing and cost accounting systems. RESULTS All patients in this study (n = 18) were men with a mean age of 47.2 years. Eight patients (44.4%) displayed submental missile entry points, 7 (38.9%) displayed intraoral entry points, and 3 (16.7%) displayed pericranial entry points. Patients with pericranial entries sustained more severe ocular injuries and had poorer ocular outcomes. Seven patients (38.9%) were found at final follow-up to have visual acuity of 20/40 or better in each eye and all showed missile trajectories in the sagittal plane. The mean cost of treatment of these patients totaled
Ophthalmic Plastic and Reconstructive Surgery | 2013
Rachel K. Sobel; Richard C. Allen
117,338 while the mean reimbursement amount was