Subdissociative-dose ketamine for sickle cell vaso-occlusive crisis: a narrative review for the emergency physician.

Vaso-occlusive crisis (VOC) in sickle cell disease can cause severe pain and requires a thoughtful approach to analgesia. Considering the heightened awareness of the harm associated with opioids, an exploration of safer and more effective alternatives is overdue. Ketamine may play a role in supplementing or replacing opioid analgesia for patients in VOC. Studies on the use of ketamine for VOC are sparse, though increasing. In this review, we summarize the literature on subdissociative ketamine use for VOC to offer providers insight into the most effective and safe dosing regimens for sickle cell disease patients. Overall, the studies discussed in this review show decreased opioid use when subdissociative ketamine is provided as an adjunct and resolution of pain for most patients when subdissociative ketamine is used as the sole form of analgesia in VOC. Most studies examined intravenous delivery, and successful outcomes were established for both adult and pediatric patients in multiple clinical settings, including in the emergency department. Although more research is needed, it is clear from the published data that subdissociative ketamine may provide an efficacious addition to the clinician's toolbox for managing VOC.

Acetylcholinesterase inhibitors to enhance recovery from traumatic brain injury: a comprehensive review and case series.

OBJECTIVE: Acetylcholinesterase inhibitors (AChEIs) are used off-label, in both adult and pediatric patients, to help further neuro-recovery after traumatic brain injury (TBI). Evidence is limited and piecemeal. This review describes how TBI affects the cholinergic system and consolidates evidence supporting or refuting the use of AChEIs following TBI. METHODS: NCBI MEDLINE search included all articles published through March 2021 on AChEI use in acute and post-acute adult TBI rehabilitation (treatment began <90 days or ≥90 days since injury, respectively), and in pediatric TBI rehabilitation. Further, we checked ClinicalTrials.gov for ongoing trials using AChEIs for TBI rehabilitation in the United States. RESULTS: 27 original articles from NCBI Medline, published through March 2021, were included. The use of AChEIs following TBI in acute and post-acute rehabilitation settings, in both adult and pediatric patients, along with medication side effects, is discussed. CONCLUSIONS: Most studies showed benefits with only moderate effect sizes because of small sample sizes. Reported side effects are minimal and stop soon after AChEIs is discontinued. Conclusions are limited by paucity of research; but fortunately, a large randomized controlled trial is ongoing, and more are needed to truly determine the efficacy of AChEIs in helping with recovery from TBI.

Short-Term Outcomes of Pediatric Keratoprosthesis With the Near-Complete Conjunctival Flap.

PURPOSE: The Boston keratoprosthesis (KPro) has been used for certain indications in pediatric patients with congenital corneal opacities. Here, we describe the use of a near-complete conjunctival flap at the time of Boston type 1 KPro surgery in pediatric patients, with the goal of improving pediatric KPro outcomes. METHODS: We performed a retrospective chart review of 21 eyes from 16 patients who received their first KPro before the age of 18 years at a tertiary care center in Rochester, NY. Surgeries were performed between 2011 and 2017 (3 years before and after the incorporation of a conjunctival flap, which began in 2014 as part of the pediatric KPro procedure). Patients who had a minimum 1-year postoperative follow-up, or had corneal melts within 1 year of KPro implantation, were included in our study. The main outcome measure in this study was a comparison of the number of complications that required surgical intervention, including retroprosthetic membrane, corneal melt, retinal detachment, and endophthalmitis, in eyes that received KPro implantation without a conjunctival flap compared with eyes that received KPro implantation with a conjunctival flap. Change in the visual acuity up to 1 year postoperatively was also measured. RESULTS: Ten eyes received KPro with no conjunctival flap, and 11 eyes received KPro with a near-complete conjunctival flap. After 1-year postoperative follow-up, eyes receiving a KPro with a conjunctival flap had fewer KPro-related complications requiring surgical intervention (5 vs. 16, P = 0.0002). Corneal melt was seen in 2 of 11 (18%) eyes in the conjunctival flap group and 5 of 10 (50%) eyes in the nonflap group (P = 0.12). No eyes developed endophthalmitis in the flap group, whereas 1 of 10 (10%) eyes developed endophthalmitis in the nonflap group. Visual acuity at 1-year follow-up improved in 9 of 11 (82%) eyes in the flap group compared with 5 of 10 (50%) eyes in the nonflap group (P = 0.3). CONCLUSIONS: Implementation of a conjunctival flap in pediatric KPro may help decrease the short-term postoperative complications requiring surgical procedures and may lead to improved visual acuity after 1 year. Further investigation, including longer-term follow-up, is needed to better understand how the described technique affects surgical outcomes in children.

Automated vessel density detection in fluorescein angiography images correlates with vision in proliferative diabetic retinopathy.

PURPOSE: To investigate the correlation between quantifiable vessel density, computed in an automated fashion, from ultra-widefield fluorescein angiography (UWFFA) images from patients with proliferative diabetic retinopathy (PDR) with visual acuity and macular thickness. METHODS: We performed a secondary analysis of a prospective randomized controlled trial. We designed and trained an algorithm to automate retinal vessel detection from input UWFFA images. We then used our algorithm to study the correlation between baseline vessel density and best corrected visual acuity (BCVA) and CRT for patients in the RECOVERY study. Reliability of the algorithm was tested using the intraclass correlation (ICC). 42 patients from the Intravitreal Aflibercept for Retinal Non-Perfusion in Proliferative Diabetic Retinopathy (RECOVERY) trial who had both baseline UWFFA images and optical coherence tomography (OCT) data were included in our study. These patients had PDR without significant center-involving diabetic macular edema (central retinal thickness [CRT] ≤320µm). RESULTS: Our algorithm analyzed UWFFA images with a reliability measure (ICC) of 0.98. A positive correlation (r = 0.4071, p = 0.0075) was found between vessel density and BCVA. No correlation was found between vessel density and CRT. CONCLUSIONS: Our algorithm is capable of reliably quantifying vessel density in an automated fashion from baseline UWFFA images. We found a positive correlation between computed vessel density and BCVA in PDR patients without center-involving macular edema, but not CRT. TRANSLATIONAL RELEVANCE: Our work is the first to offer an algorithm capable of quantifying vessel density in an automated fashion from UWFFA images, allowing us to work toward studying the relationship between retinal vascular changes and important clinical endpoints, including visual acuity, in ischemic eye diseases.

Pecs Blocks for Chronic Pain: A Case Report of Successful Postmastectomy Pain Syndrome Management.

Mastectomies can be complicated by difficult-to-treat postmastectomy pain syndrome (PMPS) and axillary web syndrome (AWS). We present a case of PMPS and AWS successfully treated with Pecs I and II blocks and trigger point injections. At follow-up after 4 months, our patient reported 70% improvement in pain, movement, function, and discontinuation of opioids. This case presents the utility of a multimodal approach for a patient with pain after mastectomy. This case report is the first-time demonstration of Pecs blocks to treat chronic PMPS.

A Novel Deep Learning Pipeline for Retinal Vessel Detection In Fluorescein Angiography.

While recent advances in deep learning have significantly advanced the state of the art for vessel detection in color fundus (CF) images, the success for detecting vessels in fluorescein angiography (FA) has been stymied due to the lack of labeled ground truth datasets. We propose a novel pipeline to detect retinal vessels in FA images using deep neural networks (DNNs) that reduces the effort required for generating labeled ground truth data by combining two key components: cross-modality transfer and human-in-the-loop learning. The cross-modality transfer exploits concurrently captured CF and fundus FA images. Binary vessels maps are first detected from CF images with a pre-trained neural network and then are geometrically registered with and transferred to FA images via robust parametric chamfer alignment to a preliminary FA vessel detection obtained with an unsupervised technique. Using the transferred vessels as initial ground truth labels for deep learning, the human-in-the-loop approach progressively improves the quality of the ground truth labeling by iterating between deep-learning and labeling. The approach significantly reduces manual labeling effort while increasing engagement. We highlight several important considerations for the proposed methodology and validate the performance on three datasets. Experimental results demonstrate that the proposed pipeline significantly reduces the annotation effort and the resulting deep learning methods outperform prior existing FA vessel detection methods by a significant margin. A new public dataset, RECOVERY-FA19, is introduced that includes high-resolution ultra-widefield images and accurately labeled ground truth binary vessel maps.

Hymenoplasty and Muslim Patients: Islamic Ethico-Legal Perspectives.

BACKGROUND: Hymenoplasty, commonly called "revirginization," is a controversial procedure that pushes the scope of medical practice to satisfy cultural and/or religious "needs." AIM: To outline the sociocultural contexts underlying patient requests for hymenoplasty and present Islamic juridical views on the moral status of hymenoplasty for Muslim patients. METHODS: Narrative review of the extant bioethics literature and leading Islamic ethico-legal verdicts. OUTCOMES: We identified "Western" and Islamic bioethical debates on hymenoplasty and the critical concepts that underpin ethical justifications for and against the procedure. RESULTS: From a Western-ethics perspective, the life-saving potential of the procedure is weighed against the role of the surgeon in directly assisting in a deception and in indirectly promoting cultural practices of sexual inequality. From an Islamic bioethical vantage point, jurists offer two opinions. The first is that the surgery is always impermissible. The second is that although the surgery is generally impermissible, it can become licit when the risks of not having postcoital bleeding harm are sufficiently great. CLINICAL IMPLICATIONS: Patient requests for hymenoplasty should be approached by surgeons with a willingness to understand patients' social contexts and reasons for pursuing the procedure and are ethically justified by leading Islamic jurists in particular circumstances. STRENGTHS AND LIMITATIONS: This article presents emic and etic perspectives on hymenoplasty in Muslim patients, although our review of the Islamic bioethical stances might have missed some juridical opinions and important considerations. Further, Muslims, even devout ones, might not be beholden to Islamic juridical views on medical procedures and thus physicians should not make assumptions about the rationale for, and ethical views of, patients seeking hymenoplasty. CONCLUSION: This article provides critical insight into how Muslim patients, and Islamic jurists, evaluate the moral contexts of hymenoplasty. Bawany MH, Padela AI. Hymenoplasty and Muslim Patients: Islamic Ethico-Legal Perspectives. J Sex Med 2017;14:1003-1010.