United States

Background:
Local anesthetics such as lidocaine and other sodium channel blockers are commonly used in obstetrics for laceration repair, epidurals, and spinal blocks. Although rare, the most common adverse effects from these medications result from drug toxicity or allergic reactions. Numerous studies in dentistry, dermatology, and emergency medicine have shown that a 1% diphenhydramine solution is comparable in anesthetic effects to lidocaine for minor laceration repairs, however no cases have been described in obstetrical literature. 

Case Presentation:
A 23-year-old gravida 1 with a reported history of an anaphylactic reaction to lidocaine and confirmatory allergy testing in Venezuela presented to Labor and Delivery for induction of labor. She strongly desired an epidural for pain control; however, our hospital was unable to offer a benzoic acid ester sodium channel blocker as an alternative to lidocaine. After fully discussing options, she agreed to an induction of labor with IV pain meds and potential use of 1% diphenhydramine local injection for laceration repair after delivery. She had a spontaneous vaginal delivery with a 2nd degree perineal laceration. The physician created a 1% diphenhydramine solution using 2mL of 5% diphenhydramine (50mg/mL) provided by the pharmacy combined with 8mL of normal saline. She then injected the solution into the vaginal tissue and perineal skin along the torn edges. The repair was done in the usual fashion. She declined any IV pain meds before or during the laceration repair and tolerated the procedure well. She reported satisfactory pain control with diphenhydramine.

Discussion
Lacerations are commonly encountered during vaginal deliveries, with 53-79% of women experiencing some form. Adequate analgesia is an essential repair component, whether via epidural or local anesthetic injection. Diphenhydramine is primarily an H1 receptor antagonist with sodium channel blocking properties similar to the amide and benzoic acid ester local anesthetics, thus giving comparable anesthesia. Although rare, lidocaine allergies pose a significant problem for obstetric patients requiring laceration repair following a delivery. Currently, there are no clear guidelines on how to proceed with a laceration repair for a patient with a true lidocaine allergy. Therefore, having an available alternative option for these patients is vital. 



AMA Research Challenge 2022

Analgesia for obstetric lacerations in patients with known lidocaine allergy; local injection with 1% diphenhydramine.

# Welcome everyone to ACL 2022!

The 60th Annual Meeting of the Association for Computational Linguistics is taking place May 22-27, 2022 as a hybrid event, in Dublin and online. We are happy to welcome all of you to this anniversary edition with an almost 50-50 in-person and virtual participation. 
The main conference program features oral presentations, in-person and virtual posters and demo sessions, a plenary session for our best paper presentations and awards, three amazing keynote events and two new initiatives of invited talks: Spotlight Talks for Young Rising Stars (STIRS) and The Next Big Idea Talks. Posters (including Findings of ACL 2022) and demos are grouped by areas for both the in-person and the virtual sessions. For the virtual component, the talks will be on Zoom and the posters and the demos will be in GatherTown. The Student Research Workshop will have an oral session and a poster session as part of Poster Session 1. The program also features eight Tutorials and 28 Workshops. 

 
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ACL 2022

The Association for Computational Linguistics (ACL) is the premier international scientific and professional society for people working on computational problems involving human language, a field often referred to as either computational linguistics or natural language processing (NLP). 

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Welcome to the largest national, multi-specialty research event featuring research from 750 medical students, residents and fellows, and international medical graduates.


Background 
Cervical cancer (CC) is one of the most frequently diagnosed antepartum gynecologic malignancies. Treatment of antepartum CC varies based on stage, gestational age at diagnosis, and patient preference for continuation or termination of pregnancy. The purpose of this case report is to demonstrate an aberrant presentation of CC and describe clinical reasoning for determining medical management. 
Case Presentation 
A 31-year-old G5P5 presented to the Emergency Department with acute profuse vaginal bleeding. Her last menstrual period was unknown, and she denied using contraception. Quantitative HCG was 8,197 mlU/mL and bedside ultrasound showed a 21w5d fetus with cardiac activity. Patient was unaware of the pregnancy. 
Initial pelvic exam showed unknown tissue that easily detached from cervix. This tissue was confirmed to be stage IIIC1 squamous cell carcinoma of the cervix. Patient desired treatment that would prioritize neonatal survival and was started on weekly chemotherapy with the intent of delaying delivery until viability. 
The patient delivered at 32w3d, and postpartum lymphatic pathology was negative for metastases. Patient had uncomplicated postpartum care and resumed chemotherapy shortly after. 
Discussion 
Medical management for antepartum CC aims to balance treatment of the patient while minimizing harm to the fetus. This patient prioritized fetal survival, but due to the advanced stage of the cancer, it was crucial for her to receive prompt oncologic treatment. Due to later gestational age, there was decreased risk for chemotherapy related fetotoxicity. Future research can attempt to determine long term side effects of second and third trimester antepartum chemotherapy. 


Cervical cancer presenting as an inevitable abortion: determining treatment for new onset cervical cancer in a previously unknown second trimester pregnancy

Uterine rupture, caused by separation of the uterine myometrium, is a rare but life-threatening complication of pregnancy that has increased in incidence over the past two decades alongside the increased rate of cesarean delivery. Uterine rupture is most often correlated with a prior cesarean delivery, prior uterine surgery, or abnormal placentation such as placenta increta, placenta percreta, or placenta accreta. It can also be associated with a short interval pregnancy of less than 6 months, prior uterine rupture, or induction of labor. A thirty-four-year-old G7P3123 African American female with a history of four prior cesarean sections and a current a viable intrauterine pregnancy at 16 weeks and 2 days by bedside ultrasound presented in critical condition to the Emergency Department at the University of Louisville with sudden onset abdominal pain following intercourse. On presentation, she was hypotensive with a blood pressure of 68/30 mmHg. Pulse was 88 beats/minute with lack of tachycardia secondarily to use of a beta blocker for chronic hypertension. Respiratory rate was 24 times per minute, and oxygen saturation by pulse oximetry (Sp02) was 100% on room air. The patient on physical exam looked pale and abdomen was distended showing clinical signs of peritonism, rebound tenderness, and guarding. She was conscious but disorientated. Early diagnosis and appropriate management are essential to decrease the high maternal and fetal morbidity and mortality rates associated with uterine rupture. High clinical suspicion and early surgical intervention with a low threshold to perform a laparotomy is fundamental to successful management. The decision for method of surgical intervention should be made on a case-by-case basis depending upon patient wishes, hemodynamic stability, as well as hospital resources for mother and a potentially premature infant. For uncontrollable, life-threatening bleeding hysterectomy should be considered. In other circumstances, decision for uterine evacuation and repair versus uterine repair alone should weigh the risk and benefits of each intervention on patient outcomes.

High Index of Clinical Suspicion for a Spontaneous Uterine Rupture in the Early Second Trimester

Protein S Deficiency in Pregnancy

Background: Herpes infections can be dormant and recurrent in patients and in the eye, can cause corneal scarring. This coupled with cataracts in patients leaves them blinded with no treatment options since the herpetic scars will reoccur if removed. 
 
Case Presentation: A 72 year old Caucasian female was referred with a Herpetic corneal scar post a prior LASIK surgery. Her best corrected vision was a distorted 20/60 with an irregular cornea. Using Excimer Laser Corneoplastique™, her cornea was brought to a measurable outcome which then allowed her to undergo accurate premium cataract surgery. 
 
Discussion: By using a two step surgical method, the patient was able to achieve emmetropia, a feat normally not possible for most herpes patients. Each problem was separately addressed: first the corneal scar secondary to herpes, and next the cataracts with a Corneoplastique technique.

Converting Irregular Herpes Cornea to Regular for Accurate Premium Cataract Surgery to 20/20

Abstract Title: Impact of Pregnancy on Idiopathic Intracranial Hypertension: A Case Series of 13 Patients
Richard Pellizzari BS, Nathan Lambert-Cheatham DO, Nathaniel Pasmanter DO, PhD, Beom Lee BS, Neysa Miller BS, Lina Nagia DO, David Kaufman DO

Background
Idiopathic Intracranial Hypertension (IIH) is a syndrome in which intracranial pressure is elevated due to unknown causes leading to papilledema and potentially permanent vision loss. Due to the association of weight gain to worsening papilledema, it has been believed that pregnancy induced weight gain could worsen IIH exacerbations. Current literature has challenged this assertion. These findings have raised questions about the impact of pregnancy in IIH and how this differs from weight gain outside the context of pregnancy. To explore these questions, our study reviews the changes in papilledema and symptoms in pregnant IIH patients at Michigan State University.

Methods
Charts were reviewed for patients who had diagnoses of IIH, had at least two clinic visits with neuro-ophthalmology, were seen during pregnancy, and did not have prior surgery for IIH. Data collected included demographics, weight/BMI, gestation, diagnostic studies (OCTs, Humphrey visual fields, head imaging, lumbar punctures), clinical tests (visual acuity, color vision, alignments, disc edema grade), and treatments. For analysis, data collected during pregnancy was compared to data from their initial IIH diagnosis, their baseline exam prior to pregnancy, and their first clinical visit after delivery.

Results
13 patients were identified who met selection criteria. 11/13 patients gained more than their previous exacerbation weight. 8/13 patients gained more weight than their goal during pregnancy. 6/13 had pharmacologic therapy for IIH discontinued during pregnancy. 3/13 patients developed a clinically significant increase in disc edema during pregnancy. 2/3 of the patients developed optic nerve atrophy and new visual field defects post pregnancy.

Conclusion
In our case series, most patients had risk factors for worsening papilledema including increased weight from initial exacerbation, weight gains over goal for pregnancy, and discontinuation of pharmacologic therapy. With these risk factors, we would expect most patients to have worsening papilledema. Despite this, only 3 patients had worsening papilledema. This finding suggest that weight gain during pregnancy likely has less impact on papilledema than traditional weight gain in IIH.

Impact of Pregnancy Weight Gain on Papilledema and Vision in IIH Patients: A Case Series


Abstract Title: MOG-Positive Optic Neuritis In A Child Presenting With Bilateral Disc Edema And Pre-Retinal Hemorrhage

Rasika Sudharshan1, Mark S. Borchert2, Melinda Y. Chang2
1USC Keck School of Medicine, 2Children’s Hospital Los Angeles, Department of Ophthalmology 

Background
Our case discusses an 8-year-old male with no relevant past medical history or trauma, who presented with two weeks of progressive bilateral vision loss that acutely worsened over 3 days. This case demonstrates typical features of optic neuritis in children, including bilaterality, severe vision loss, disc edema, and the atypical finding of extensive retinal and preretinal hemorrhages in the macula. 

Case Presentation
On presentation, his visual acuity was light perception with dilated and poorly reactive pupils. Fundus exam showed bilateral optic disc edema (with pallor) and retinal venous tortuosity without cotton wool spots. Pupil exam showed a right RAPD. His left fundus exam was also significant for preretinal and intraretinal hemorrhages. Lumbar puncture showed an elevated opening pressure (36mmH2O) with normal glucose, abnormal protein at 77, and mildly elevated pleocytosis at 12. Brain MRI showed an incidental small posterior fossa arachnoid cyst but no white matter lesions, and orbit MRI showed bilateral optic nerve enhancement consistent with optic neuritis, right greater than left. Lab tests showed a normal CBC and a MOG-Ab positive titer level of 1:100. 

After six doses of IV methylprednisolone and completion of five days of plasmapheresis, visual acuity improved to 10/200 OD and 20/100 OS. Then, after three rounds of IVIG and prednisone taper, his visual acuity improved to 20/80 and 20/30. Forty-eight days after treatment, bilateral optic disc edema and retinal hemorrhages resolved. His final examination showed bilateral optic atrophy OU and visual acuity of 20/40 OD and 20/20 OS. 

Discussion
Due to increased intracranial pressure (ICP) on lumbar puncture and intra- and preretinal hemorrhages, papilledema or leukemia were considered. Increased ICP has not been consistently reported in patients with MOG-Ab ON, and ICP was believed to be falsely elevated in this case due to excessive hypercapnia associated with sedation. Retinal hemorrhages are rare in optic neuritis, which typically occurs without disc edema in adults. In children, optic neuritis may be associated with disc edema and peripapillary hemorrhages in severe cases, especially in those with MOG-Ab positivity. This is the first case, to our knowledge, of preretinal hemorrhage in the macula associated with MOG-Ab positive optic neuritis.


MOG-Positive Optic Neuritis In A Child Presenting With Bilateral Disc Edema And Pre-Retinal Hemorrhage

Background: Pigmentary retinal dystrophy (PRD) is a group of inherited disorders involving the progressive degeneration of rod and cone photoreceptors and the retinal pigment epithelium (RPE), which can progress to pigmentary retinopathy (PR). We present a case of PRD in a female pediatric patient with mutations in the PRPH2 and PEX1 genes.

Case Presentation: A 4-year-old female patient presented to the pediatric ophthalmologist with concern for developmental delay and “feeling around for objects” despite full-time glasses wear. Comprehensive evaluation revealed visual acuities of 20/180 in the right eye and 20/270 in the left eye via Teller cards, hyperopia with astigmatism, extensive retinal pigmentation 360° in the mid-periphery, and decreased foveal reflexes that were concerning for macular edema bilaterally. Optical Coherence Tomography of the macula revealed thickened retinal segments and schisis/edema of the outer retinal segments. The patient was also diagnosed with bilateral sensorineural hearing loss. Subsequent genetic evaluation yielded pathogenic homozygous mutation for the PEX1 c.2528G>A, p. (Gly843Asp) gene and a heterozygous mutation for the PRPH2 c.806C>G, p. (Thr269Arg) gene. Treatment for severe macular edema has included topical dorzolamide and intravitreal dexamethasone injection with successful improvement in macular edema and vision.


Discussion: The PEX1 gene mutation is associated with peroxisome biogenesis disorder-Zellweger syndrome spectrum (PBD-ZSS) and resulting retinal dystrophies. Furthermore, the PRPH2 mutation may play a role in macular edema and PRD, as it is implicated in macular degeneration, choroid defects, and photoreceptor dysfunction. This case demonstrates the potential for multiple gene etiologies in a single patient with PRD and the significant resulting visual impairment. Ocular findings in historical cases of PBD-ZSS have consistently included loss of photoreceptors, RPE, and ganglion cells. Retinal pigment dispersion, optic disc pallor and hypoplasia, and narrowed retinal arterioles were also consistently observed. PBD-ZSS has less consistently been associated with cataracts, glaucoma, and corneal clouding. Treatment remains supportive, aiming to control macular edema and correct refractive errors.

Retinal Dystrophy associated with Peroxisome Biogenesis Disorder-Zellweger Syndrome Spectrum

Background: Klebsiella pneumoniae, a gram-negative anaerobic rod-shaped bacterium, is a rare cause of endogenous endophthalmitis. We describe a case of Klebsiella endophthalmitis presenting with a uniquely rapid time course and evidence of intraocular abscesses.

Case Presentation: 
A 37-year-old Hispanic male, with no known ocular history and a past medical history significant for type 2 diabetes mellitus and recent diagnosis of COVID19, was admitted to the hospital with shortness of breath, chest pain and hyperglycemia. Ophthalmology was consulted due to subjective change in vision in the right eye. On examination, his near visual acuity was 20/40 and 20/25 in the right eye and left eye, respectively. Funduscopic exam was notable for mild macular edema with exudates and scattered intraretinal hemorrhages in the right eye, which was attributed to diabetic retinopathy. 
One day after the ophthalmologic consultation, the patient acutely decompensated requiring intubation and transfer to the MICU. Blood cultures grew gram negative rods speciating to Klebsiella. Two days later, he was noted to have worsening redness in the right eye, and ophthalmology was re-consulted. Fundoscopic exam at this time was limited, but showed inferonasal white-centered hemorrhages. B-scan ultrasound demonstrated vitreous debris with a grossly attached retina. He was started on treatment for endophthalmitis with intravitreal antibiotic injections. 
Subsequent repeat examinations showed continued decreased visual acuity to light perception (LP), then no light perception in the right eye and development of a near total retinal detachment. Goals of care were discussed, and a decision was made to focus on comfort measures for the right eye, less than a month after his initial examination.

Discussion: In contrast to previously published case reports, our patient had a bedside visual acuity of 20/40 upon initial consultation which, within six days of the initial evaluation, worsened to LP. This rapid deterioration of vision is likely a function of the bacteria’s quick doubling time of 2.31 hours. Due to the rapidly progressive nature of Klebsiella endogenous endophthalmitis, we recommend to primary teams to consult ophthalmology for daily funduscopic examinations once blood cultures have confirmed the causative organism.


Unrelenting Vision Loss: The Virulence of Klebsiella pneumoniae

Background:
Posterior labral tears are common in the shoulders of collision athletes and frequently present with instability and dysfunction. These can be successfully stabilized arthroscopically, but it is essential to identify and treat the full extent of the injury, especially in high demand athletes. We present a surgical technique utilized to repair a 180˚ posterior and inferior labrum tear in a professional collision athlete with symptomatic posterior instability.

Indications:
Arthroscopic stabilization of posterior labral tears is indicated in athletes with recurrent instability events and the inability to return to their previous level of play with nonoperative management.

Technique Description:
This arthroscopic 180˚ posterior and inferior labral repair is performed in the lateral decubitus position. An EUA helps guide surgical management, as identifying and treating the full extent of the labral tear is essential for successful management. An accessory posteroinferior 7 o’clock portal is necessary for low posterior anchor placement. Stability is critical in collision athletes so slightly overtightening the shoulder is optimal, and large bites in the capsule allow for an aggressive capsular shift. Multiple suture tapes are utilized per anchor, increasing the number of fixation points in the capsule and labrum, creating a very robust repair. A large spread between sutures in the same anchor is avoided to prevent bunching of the labrum. Percutaneous anchors are placed to completely address superior and anterior extension.

Results
Arner, McClincy and Bradley have shown very successful outcomes following posterior labral repairs in American football players. 93% returned to play with 79% returning at the same level, and 96.5% were satisfied with the procedure. They showed these players can safely return to contact sports at 6 months following surgery. Our patient followed a similar course, returning to professional collision sports at 6 months post op and was very satisfied with his outcome.

Discussion/Conclusions:
Arthroscopic posterior labral repair can be a very successful procedure if the full extent of the labral tear is identified and addressed. Robust fixation and an aggressive capsular shift are the goals in collision athletes.


180˚ Posterior and Inferior Labral Tear in A Professional Collision Athlete with Symptomatic Posterior Shoulder Instability, A Case Report.

Background
Compartment syndrome (CS) is a known and severe complication of extremity injury and can result in permanent loss of limb function and vital organ damage. CS typically develops within 48 hours of injury and may be diagnosed clinically or with direct compartment manometry. Here we will present a polytrauma patient who developed CS 13 days after intramedullary fixation of a tibial diaphysis fracture.

Case Presentation
Our patient was a 38-year-old male who presented to our facility as a level 2 trauma after being struck by a car while on his bicycle. Examination and radiographic studies were significant for left mid-shaft tibia fracture with associated fibular shaft fracture and nondisplaced posterior malleolar fracture, left nondisplaced scapular body fracture, and right distal third clavicle fracture. Left lower extremity was splinted with strict ice and elevation with compartment checks performed every four hours. He underwent percutaneous fixation of the posterior malleolus and intramedullary fixation of the tibial shaft fracture on the morning of hospital day 1 with simple posterior slab splint application. Postoperatively, compartment checks were continued, and he demonstrated no signs or symptoms concerning for compartment syndrome. He presented to clinic on post-operative day 13 with complaints of new onset paresthesia and increasing pain. Splint was removed in clinic where left leg was noted to be very firm to palpation, and patient expressed increased pain with passive motion of the great toe, findings concerning for compartment syndrome. Direct compartment manometry was then performed using Stryker Intra-Compartmental Pressure Monitor System finding compartment pressure as follows: Anterior 49 mmHg, lateral 41 mmHg, superficial posterior 31 mmHg, and deep posterior 30 mmHg. Patient was deemed to have compartment syndrome at this time, and went for urgent four-compartment fasciotomy of the left leg with negative pressure wound therapy device application.

Discussion
Intracompartmental pressure may increase during reduction and intramedullary nailing, but intramedullary nailing is not associated with an increased risk for developing compartment syndrome. Although this patient went on to an uneventful outcome from this fracture and subsequent CS, his experience demonstrates the need for increased suspicion if clinical signs and symptoms are concerning.



Next from AMA Research Challenge 2022

Cervical cancer presenting as an inevitable abortion: determining treatment for new onset cervical cancer in a previously unknown second trimester pregnancy

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