Absceso periamigdalino bilateral. Reporte de un caso y revisión de las controversias en el diagnóstico y tratamiento / Bilateral peritonsillar abscess. A case report and review of controversies surrounding diagnosis and management

La presentación bilateral del absceso periamigdalino es poco frecuente. Su abordaje es controversial y se discute si realizar amigdalectomía en caliente versus diferida. Se presenta el caso de un paciente de sexo masculino, de 14 años, con odinofagia, trismo y fiebre. Presentaba hipertrofia amigdalina bilateral, pilares abombados y edema de paladar blando. Tomografía computada: hipertrofia amigdalina bilateral, con realce poscontraste, ambas con colección, edema con moderada estenosis faríngea. Se decidió internación para tratamiento endovenoso y amigdalectomía con drenaje bilateral. Resolución completa del cuadro con alta a las 48 horas. Ante la presencia de un absceso periamigdalino, debe considerarse la posibilidad de un absceso contralateral oculto. Debe ser diagnosticado y tratado adecuadamente para prevenir complicaciones. La amigdalectomía en caliente podría ser un tratamiento seguro y debería ser considerado en pacientes que serán sometidos a anestesia para drenaje. La decisión final debe ser determinada para cada caso en particular.

The bilateral presentation of peritonsillar abscess is uncommon. Its management is controversial and it has been argued whether a quinsy tonsillectomy or an interval tonsillectomy should be performed. Here we describe the case of a 14-year-old boy with sore throat, trismus, and fever. He had bilateral tonsillar hypertrophy, convex arches, and soft palate edema. Computed tomography: bilateral tonsillar hypertrophy, with post-contrast enhancement, both with collection, edema with moderate pharyngeal stenosis. The patient was hospitalized for intravenous therapy and tonsillectomy with bilateral drainage resulting in a complete resolution of his condition and discharge at 48 hours. In the presence of a peritonsillar abscess, an unsuspected contralateral abscess should be considered. It should be diagnosed and managed adequately to prevent complications. Quinsy tonsillectomy could be safe and should be considered in patients who will undergo anesthesia for abscess drainage. The final decision should be made for each patient on an individual basis.

Bilateral peritonsillar abscess. A case report and review of controversies surrounding diagnosis and management. / Absceso periamigdalino bilateral. Reporte de un caso y revisión de las controversias en el diagnóstico y tratamiento.

The bilateral presentation of peritonsillar abscess is uncommon. Its management is controversial and it has been argued whether a quinsy tonsillectomy or an interval tonsillectomy should be performed. Here we describe the case of a 14-year-old boy with sore throat, trismus, and fever. He had bilateral tonsillar hypertrophy, convex arches, and soft palate edema. Computed tomography: bilateral tonsillar hypertrophy, with post-contrast enhancement, both with collection, edema with moderate pharyngeal stenosis. The patient was hospitalized for intravenous therapy and tonsillectomy with bilateral drainage resulting in a complete resolution of his condition and discharge at 48 hours. In the presence of a peritonsillar abscess, an unsuspected contralateral abscess should be considered. It should be diagnosed and managed adequately to prevent complications. Quinsy tonsillectomy could be safe and should be considered in patients who will undergo anesthesia for abscess drainage. The final decision should be made for each patient on an individual basis.

La presentación bilateral del absceso periamigdalino es poco frecuente. Su abordaje es controversial y se discute si realizar amigdalectomía en caliente versus diferida. Se presenta el caso de un paciente de sexo masculino, de 14 años, con odinofagia, trismo y fiebre. Presentaba hipertrofia amigdalina bilateral, pilares abombados y edema de paladar blando. Tomografía computada: hipertrofia amigdalina bilateral, con realce poscontraste, ambas con colección, edema con moderada estenosis faríngea. Se decidió internación para tratamiento endovenoso y amigdalectomía con drenaje bilateral. Resolución completa del cuadro con alta a las 48 horas. Ante la presencia de un absceso periamigdalino, debe considerarse la posibilidad de un absceso contralateral oculto. Debe ser diagnosticado y tratado adecuadamente para prevenir complicaciones. La amigdalectomía en caliente podría ser un tratamiento seguro y debería ser considerado en pacientes que serán sometidos a anestesia para drenaje. La decisión final debe ser determinada para cada caso en particular.

Outcomes of abscess tonsillectomy in patients awaiting tonsillectomy: A comparison with interval tonsillectomy.

PURPOSE: Peritonsillar abscesses (PTA) occasionally occur in patients who have a concurrent history of recurrent tonsillitis or prior PTA episodes. These patients sometimes meet the indications for elective tonsillectomy even prior to the current PTA event. Abscess ("Quinsy") tonsillectomy (QT) could serve as definitive treatment in this specific subgroup, though it is not performed often. The purpose of this study was to compare the perioperative outcomes between immediate QT and tonsillectomy performed several days (delayed QT) or weeks (Interval tonsillectomy, IT) after incision and drainage (I&D) of the PTA in this specific subgroup. MATERIALS AND METHODS: A retrospective perioperative outcomes analysis of patients undergoing tonsillectomy (2002-2022) compared QT to delayed QT and IT in patients with PTA meeting AAO-HNS elective tonsillectomy criteria. RESULTS: 110 patients were included: 55 underwent IT, 36 underwent delayed QT, and 19 underwent immediate QT. Postoperative hemorrhage rates were 14.5 %, 11.1 %, and 5.3 % for IT, delayed QT, and immediate QT, respectively (P = 0.08). Mean hospitalization durations were 7.98, 6.92, and 5.37 days for IT, delayed QT, and immediate QT, respectively (P < 0.01). IT had a higher readmission rate due to pain compared to QT (14.5 % vs. 1.9 %, p = 0.032). CONCLUSION: Immediate QT in PTA patients eligible for elective tonsillectomy is associated with lower postoperative hemorrhage, shorter admission time, and potentially reduced postoperative pain compared to I&D and delayed or interval tonsillectomy. These findings suggest that immediate QT should be considered as a primary treatment in this subgroup of eligible patients.

Predicting failure of detection of peritonsillar abscess with ultrasound in pediatric populations.

PURPOSE: Some patients require additional imaging following ultrasound (US) to definitively diagnose a peritonsillar abscess (PTA), delaying intervention and disease resolution. We seek to evaluate patient characteristics which may predispose to a secondary imaging requirement to diagnose PTA, in order to better understand ultrasound limitations and predict who will require additional studies. MATERIALS AND METHODS: Retrospective chart review of patients with an US for suspected PTA between July 2017 and July 2020. Patient age, weight, and clinical characteristics, such as pain, trismus, and reduced neck range of motion (ROM) were collected. The need for additional imaging, subsequent surgical intervention, and hospital length of stay (LOS) were also recorded. RESULTS: Of 411 qualifying patients, 73 underwent additional imaging. Patients who required additional imaging were younger (9.8 vs 11.3 years, p = 0.026) and more likely to have decreased neck ROM (17.8 vs 5.3 %, p = 0.001). Surgical intervention was performed more commonly (27.4 vs 14.8 %, p = 0.015) and hospital LOS was longer (24.0 vs 5.0 h, p < 0.001) in those with secondary imaging. CONCLUSIONS: Specific patient characteristics, such as younger age and decreased neck range of motion, are associated with a higher need for additional imaging. Additionally, the need for additional imaging is associated with a longer hospital LOS and increased likelihood of surgical intervention. Nearly 18 % of patients who underwent US evaluation of PTA required secondary imaging. Although transcervical US remains an excellent tool for diagnosing PTA, this data supports the utility of secondary imaging in certain instances.

High rate of early recurrence of peritonsillar abscess among adolescents and young adults.

BACKGROUND: Peritonsillar abscess (PTA) can be treated with aspiration or incision for drainage, but a subsequent PTA can occur if tonsillectomy is not performed. Better understanding is needed of when tonsillectomy should be performed to avoid PTA recurrence. OBJECTIVE: This study investigated the recurrence rate of PTA following aspiration or incision for drainage and evaluated the risk factors for recurrence. METHODS: The medical records of 292 patients treated for PTA were reviewed. Recurrence of PTA and elective or quinsy tonsillectomy were the primary endpoints. A Cox proportional hazards regression model for PTA recurrence was constructed with sex, age, and PTA history as predictors. RESULTS: Young age was the only significant predictor of PTA recurrence. Patients aged 15 to 24 years had a 30-day recurrence rate of 15.5% and a total recurrence rate of 26.6%. The total recurrence rate among patients over 30 years of age was significantly less at 4.0% (Fisher's exact test, p < .05). CONCLUSION AND SIGNIFICANCE: Based on our results, tonsillectomy should be considered for PTA patients between 15 and 25 years of age and, to effectively avoid future recurrence of PTA, should be performed urgently.

Peritonsillar abscess on NSQIP: Safety of indicated quinsy tonsillectomy.

OBJECTIVE: To compare surgical outcomes for children with peritonsillar abscess (PTA) who are taken to the operating room (OR) for incision and drainage (I&D) or quinsy tonsillectomy. METHODS: This is a multicenter retrospective study of pediatric patients who underwent I&D of a PTA between 2012 and 2017 included in the American College of Surgeons National Surgical Quality Improvement Program (NSQIP) database. Patient demographics, comorbidities, and 30-day postoperative events (reoperation, readmission, and complications) were assessed. RESULTS: 777 patients were identified (mean age of 10.7 years, 54% female). 656 (84%) were admitted through the emergency department, and 395 (51%) met criteria for systemic inflammatory response syndrome or sepsis. Fifty-two (6.7%) had a quinsy tonsillectomy done at the time of incision and drainage. For quinsy tonsillectomy versus I&D alone, there was no statistically significant difference in length of stay (LOS) (1.9 v. 1.7 days, p = .523), readmission (17 v. 0, p = .265) or return to the OR (18 v. 1, p = .810). Patients younger than 5 years had a longer LOS (p < .001) while females (p = .003) and patients between 12 and 17 years of age (p = 0.021) were more likely to be readmitted. Of 725 patients treated with I&D alone, 10 (1.4%) patients required a repeat I&D and 6 (0.83%) went on to have an interval quinsy tonsillectomy. CONCLUSIONS: Outcomes of I&D and quinsy tonsillectomy for pediatric PTA in the operating room are the same. If tonsillectomy is indicated in the case of recurrent tonsillitis or PTA, a quinsy tonsillectomy is a good option.

Recognizing a Peritonsillar Abscess in Pediatric Patients.

A peritonsillar abscess (PTA) is a localized collection of pus in the peritonsillar space, between the palatine tonsillar capsule and the superior pharyngeal constrictor muscle (G. Gupta & R. McDowell, 2022). It is the most commonly occurring abscess in the head and neck region. Patient presentation usually includes odynophagia, unilateral otalgia, trismus, and voice changes. Managing a pediatric patient may be challenging, as children may not be able to describe their history of illness and symptoms. The management of a PTA can also differ between pediatric and adult patients (S. Ahmed Ali et al., 2018). It is important for practitioners to consider all aspects when providing treatment. This article describes the encounter and individualized treatment plan of an 11-year-old nonverbal autistic child who presented with fever, decreased oral intake, and left neck swelling. It also provides a general overview of PTAs and procedural steps to perform drainage through needle aspiration and incision and drainage.

Use of CEUS for Imaging Evaluation of Pediatric Peritonsillar Abscess.

PURPOSE: Peritonsillar abscess can be diagnosed by B-mode ultrasound and cross-sectional imaging. The latter (with MRI being the modality of first choice in children) is associated with higher effort and risk for pediatric patients due to the administration of X-rays and/or the need of sedation. The purpose of this study is to evaluate whether the introduction of CEUS into the diagnostic algorithm for suspected pediatric peritonsillar abscess is suitable and advantageous. MATERIALS AND METHODS: Single-institution retrospective review of data of pediatric patients who were presented to the department of pediatric radiology for sonographic evaluation under the suspicion of peritonsillar abscess. Diagnostic performance of CEUS was evaluated by using surgical exploration or clinical follow-up as the reference standard. RESULTS: 284 children included in the study underwent B-mode ultrasound. Mean age of all patients was 6,23 years. Peritonsillar abscess was the diagnosis in 42 patients. Diagnosis of peritonsillar abscess was made by B-mode ultrasound alone in 13 of 42 patients (31 %). In 17 of 42 patients (40 %), diagnosis was made by a combination of B-mode ultrasound and CEUS. Sensitivity rose from 37 % to 86 % in cases where B-mode ultrasound remained unclear and CEUS was used. CONCLUSION: Contrast-enhanced ultrasound (CEUS) is suitable and efficient for the diagnosis of peritonsillar abscess in pediatric patients. It increases the sensitivity for the diagnosis of peritonsillar abscess and thereby reduces the need of additional cross-sectional imaging for the pediatric patients.

Bilateral Intratonsillar Abscesses: A Deceiving Symmetrical Oral Bulging.

BACKGROUND: Unilateral intratonsillar abscess (ITA) is an underreported, well-known complication of acute tonsillitis. The prevalence of unilateral ITA compared to peritonsillar abscess (PTA) is 1:14. However, bilateral ITA is an extremely rare entity, with only four cases reported thus far. OBJECTIVES: To describe past cases and our experience, elaborating the diagnostic challenge and the surgical treatment for bilateral ITA. METHODS: We conducted a literature search in the PubMed database using the key words intra-tonsillar abscess, tonsillar abscess, bilateral tonsillar abscess, bilateral intra-tonsillar abscess and bilateral peritonsillar abscess. Our search was limited to the years 1980 to 2020. RESULTS: We found that only four cases of bilateral ITA were previously published. All were characterized by a delay in diagnosis with a median of 10 days (4-14 days), symmetrical oral cavity appearance, enlarged bilateral kissing tonsils, and subsequent treatment by surgical drainage/paracentesis. Respiratory compromise was a concern in most cases. Our patient was treated with bilateral quinsy tonsillectomy and had a prompt recovery. CONCLUSIONS: Bilateral ITA is a rare, deceiving entity, with a diagnosis delay attributed to the symmetrical oral bulging. We present the fifth case reported and the first ever reported in a pediatric patient. We describe the assumed pathogenesis and the main characteristics among all five patients, emphasizing the important role of a high index of suspicion and appropriate imaging, guiding to proper diagnosis and treatment.

Lateral neck cyst surgery without ipsilateral tonsillectomy: a retrospective analysis.

PURPOSE: Several theories have been proposed regarding the origin of lateral neck cysts (LNC). Besides complete surgical resection ipsilateral tonsillectomy and dissection of a tract or its remnants is sometimes recommended. In this retrospective trial we wanted to evaluate if patients, who received LNC resection only, develop complications or recurrence to justify this surgical strategy. METHODS: Patients who received LNC resection between 2004 and 2017 at the Ear Nose and Throat Department of a university hospital were included. Data was collected from the clinic database and through a structured telephone interview. RESULTS: A total of 126 patients met the inclusion criteria. In this collective, the diagnosis of a lateral neck cyst was confirmed histologically. Mean age at time of operation was 38 years (± 14.6). The median follow-up time was 7 years (range 3-18). None of the participants experienced recurrent unilateral pharyngitis or tonsillitis during follow-up. Furthermore, there was no case of postoperative peritonsillar, neck phlegmon or neck abscess. No patient reported recurrence of LNC. CONCLUSIONS: Sole complete resection of LNCs is sufficient to avoid postoperative infections and recurrences. Therefore, ipsilateral tonsillectomy and tract dissection is not necessary in routine cases of LNC surgery.

The Newport Quinsy Simulator.

BACKGROUND: The junior otolaryngologist is responsible for recognition and drainage of the peritonsillar abscess. Although other simulators have been proposed, there is still a need for an accessible, educationally useful, low-cost peritonsillar abscess simulator to build skills and confidence in the novice. METHODS: The peritonsillar abscess simulator was constructed from basic disposable healthcare equipment and a party balloon. Evaluation of this Newport Quinsy Simulator was performed by expert and novice clinicians, who provided feedback in the form of Likert scales and free-text qualitative responses. RESULTS: Overall, 24 clinicians evaluated the simulator. All felt the simulator was useful for the novice otolaryngologist, and represented the key anatomy and motor skills needed to drain a peritonsillar abscess. Qualitative evaluation highlighted the educational usefulness of the simulator as a peritonsillar abscess training device. CONCLUSION: The Newport Quinsy Simulator is affordable, accessible, easy to use and educationally valuable to the novice otolaryngologist.

Risk Factors for Recurrence of Peritonsillar Abscess.

OBJECTIVES: This study aimed to investigate the risk factors associated with peritonsillar abscess (PTA) recurrence in adult patients. METHODS: This retrospective cohort study used a nationwide insurance claims database in Japan. Adult patients (aged ≥ 20 years) who received intravenous antibiotics or surgical therapy within 5 days of their first PTA diagnosis were included. Multivariable Cox proportional modeling was used to investigate the risk factors for PTA recurrence using the variables: age, sex, comorbidities, tobacco use, history of recurrent tonsillitis, duration of intravenous antibiotics, and surgical therapy for PTA. RESULTS: This study included 12,012 patients (8784 men, 73.1%). Of them, 1358 (11.3%) experienced PTA recurrence. An age ≥40 years and treatment with intravenous antibiotics for 3 days or more were associated with a lower risk of PTA recurrence (aged ≥ 40 years: adjusted hazard ratio [HR]: 0.69; 95% confidence interval [CI]: 0.62-0.78, treated with intravenous antibiotics for 3 days or more: adjusted HR: 0.85; 95% CI: 0.76-0.96). Patients with a history of recurrent tonsillitis were associated with a higher risk of recurrence (adjusted HR: 1.79; 95% CI: 1.47-2.19). CONCLUSION: A median age of 20-39 years, a history of recurrent tonsillitis, and less than 3 days of intravenous antibiotic therapy may be risk factors for PTA recurrence among adult patients. Further studies exploring more detailed clinical data are necessary to confirm the risk factors for PTA recurrence. LEVEL OF EVIDENCE: 3 Laryngoscope, 133:1846-1852, 2023.

Assessment of YouTube as an educational tool in teaching flexible nasendoscopy and peritonsillar abscess drainage.

BACKGROUND: Partly as a result of coronavirus disease 2019, YouTube has become a more frequent educational source for otolaryngology trainees. This study sought to assess the quality of flexible nasendoscopy and peritonsillar abscess drainage videos. METHOD: YouTube was systematically searched using 13 terms related to flexible nasendoscopy and peritonsillar abscess drainage. Two independent reviewers assessed the quality of each video using the Laparoscopic Video Educational Guidelines. RESULTS: Twenty-seven videos were deemed suitable. The mean total Laparoscopic Video Educational Guidelines scores for videos on flexible nasendoscopy (18 videos) and peritonsillar abscess drainage (9 videos) were 10.3 (standard deviation = 3.1) and 11.7 (standard deviation = 4.6), respectively. Most of the videos were deemed of medium quality. The Laparoscopic Video Educational Guidelines score correlated positively with flexible nasendoscopy video length and how recently a peritonsillar abscess drainage video had been uploaded. CONCLUSION: The limited high-quality videos on YouTube are difficult to identify from the search metrics available. Trainees and ENT induction programmes would benefit greatly from an online platform that contains a catalogue of high-quality surgical videos.

Peritonsillar abscess: an 8-year retrospective, culture based evaluation of 208 cases.

Introduction. Peritonsillar abscess (PTA) is a common infection which requires surgical intervention and suitable antibiotic therapy.Hypotheses/Gap Statement. Beside Streptococcus pyogenes and Fusobacterium necrophorum several other mostly anaerobic bacteria can be cultured from the properly taken pus samples of PTA, the clinical significance of which is still not fully understood.Aim. This study focused on the culture-based microbiological evaluation of PTA cases, compared to surgical intervention and empirical antibiotic management.Methodology. A retrospective analysis of PTA cases was performed between 2012 and 2019. Data about the aerobic and anaerobic culture results of the samples taken during different surgical interventions were summarized and the coverage of the empirically selected antibiotics was evaluated. The patient's history, the development of complications and the recurrence rate were also evaluated.Results. The microbiological culture results were available for 208 of 320 patients with clinically diagnosed PTA. Incision and drainage (I and D) and immediate tonsillectomy were the leading surgical interventions. Ninety-five Fusobacterium species (including 44 Fusobacterium necrophorum), 52 Actinomyces species and 47 Streptococcus pyogenes were obtained from PTA samples alone or together with polymicrobial flora. S. pyogenes (33.7 %, n=28) and F. necrophorum (22.9 %, n=19) were the dominating pathogens in the 83 monobacterial PTA samples. In >60 % of the patients polymicrobial infection was demonstrated, involving a great variety of anaerobic bacteria. In 22 out of 42 cases where intravenous cefuroxime was empirically started, the therapy should be changed to properly cover the culture-proven anaerobic flora. There were no serious complications, abscess recurrence was detected in two cases (0.96 %).Conclusion. PTAs are often polymicrobial infections including a great variety of anaerobes. Targeted antibiotic therapy, in conjunction with adequate surgical drainage eliminating the anaerobic milieu, can accelerate the healing process and radically reduce the complication and recurrence rate.

Quality of Life Assessment for Tonsillar Infections and Their Treatment.

Background and Objectives: Tonsillar infections are a common reason to see a physician and lead to a reduction in the patients' health-related quality of life (HRQoL). HRQoL may be an important criterion in decision science and should be taken into account when deciding when to perform tonsillectomy, especially for chronic tonsillitis. The aim of this study was to determine the health utility for different states of tonsillar infections. Materials and Methods: Hospitalized patients with acute tonsillitis or a peritonsillar abscess were asked about their HRQoL with the 15D questionnaire. Patients who had undergone tonsillectomy were reassessed six months postoperatively. Results: In total, 65 patients participated in the study. The health states of acute tonsillitis and peritonsillar abscess had both a utility of 0.72. Six months after tonsillectomy, the mean health utility was 0.95. Conclusions: Our study confirms a substantial reduction in utility due to tonsillar infections. Tonsillectomy significantly improves the utility and therefore HRQoL six months after surgery.

Peritonsillar abscess caused by Prevotella bivia during home quarantine for coronavirus disease 2019: Case report.

RATIONALE: Since late 2019, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) had rapidly spread worldwide, resulting in a pandemic. Patients with coronavirus disease 2019 (COVID-19) have difficulty in visiting clinics in person during pandemic because they might be encouraged to quarantine at home with supportive care. Peritonsillar abscess rarely coexists with COVID-19; however, patients with SARS-CoV-2 infection could get co-infections or become superinfected with other microorganisms which could cause peritonsillar abscess. We herein describe a case of peritonsillar abscess caused by Prevotella bivia that occurred as a co-infection with COVID-19 during home quarantine. PATIENT CONCERNS: A 32-year-old Asian woman who was diagnosed with COVID-19 was instructed to stay home for quarantine. Her pharyngeal discomfort worsened, and she experienced trismus and dysphagia. An emergent visiting doctor referred her to our hospital. Contrast-enhanced computed tomography showed peritonsillar abscess findings, following which we referred her to an ear, nose, throat specialist. Prevotella bivia was identified on needle aspiration pus culture; however, two sets of blood and throat cultures were negative. DIAGNOSIS: A definitive diagnosis of acute COVID-19 and peritonsillar abscess due to Prevotella bivia was made. INTERVENTIONS: An antibiotic drug, antiviral drug, and adjunctive steroid were administered intravenously. OUTCOMES: Her symptoms improved without the need for incision and drainage, and she was discharged on day 7. CONCLUSION: Patients with suspected peritonsillar abscess should be triaged and referred to ear, nose, throat specialists appropriately. Scoring systems, such as modified Liverpool peritonsillar abscess score or the guidelines criteria might be useful tools to triage patients. During the early phase of SARS-CoV-2 infection, administration of corticosteroids is not recommended. When adjunctive steroids are considered for peritonsillar abscess, prior to or simultaneous use of the antiviral agent remdesivir for COVID-19 might be recommended.

[Abscesstonsillectomy: Uni- or bilateral?] / Abszesstonsillektomie: Uni- oder bilateral?

OBJECTIVE: In addition to an empirical use of antibiotics for treatment of a peritonsillar abscess (PTA) there is a drainage of pus or the abscess tonsillectomy. Postoperative bleeding after abscesstonsillectomy (ABTE) is this surgery's most feared complication which can rarely lead to patients' deaths. The objective of this study was to compare bleeding complications of ABTE with and without contralateral tonsillectomy (TE) and to analyze the occurrence of a metachronous PTA at the contralateral side. METHODS: Retrospective study of n= 655 patients undergoing ABTE with and without TE of the contralateral side from 2004 to 2019. Bleeding complications needing surgical hemostasis were analyzed regarding demographic and surgical parameters. In addition, occurrence of PTA and need for ABTE of the contralateral side after unilateral ABTE were evaluated. RESULTS: Overall, 10/655 (1.5 %) patients presented with postoperative bleeding after ABTE. In 404/655 an ABTE with contralateral TE was performed. Here, 8/404 (1.98 %) patients showed contra- or bilateral bleeding. Only in 2/251 (0.7 %) patients occurred a bleeding complication after unilateral ABTE. Therefore, bleeding after unilateral ABTE was significantly lower than ABTE with contralateral TE (1.98 % vs. 0.7 %, p= 0.001). In 0.8 % of the patients a contralateral ABTE was necessary due to a metachronous PTA. CONCLUSION: Overall, the rate of postoperative bleeding after ABTE (1.5 %) was low. Unilateral ABTE showed significantly lower postoperative bleeding rates compared to ABTE with contralateral TE. Consequently, the indication of a contralateral TE must be very strict.

A Low-Cost Ultrasound Phantom for Peritonsillar Abscess Drainage Training.

BACKGROUND: Peritonsillar abscesses (PTAs) are encountered routinely in clinical practice. Ultrasound-guided aspiration has been proven both safe and effective in treating this condition. However, to date, there are no easily produced, low-cost models that enable the practice of point-of-care ultrasound-guided PTA aspiration and PTA diagnosis. OBJECTIVES: The objective was to create a low-cost, easy-to-produce, ultrasound phantom to train emergency physicians on ultrasound-guided PTA drainage. METHODS: We improved on previous work with ultrasound phantoms by creating a refillable phantom that approximates the oral cavity. This enabled learners to gain the manual dexterity necessary to operate an intraoral ultrasound probe while also aspirating a PTA. RESULTS: We have created a low-cost ultrasound phantom that is amenable to repeated ultrasound-guided aspirations for the purpose of training both resident- and attending-level physicians. CONCLUSION: With minimal lead time and readily available equipment, we successfully created a low-cost ultrasound phantom for the purpose of PTA identification and drainage.