Spontaneous Rectus Sheath Hematoma: Factors Predictive of Conservative Management Failure

Clinical management of active bleeding: what the emergency radiologist needs to know

Active bleeding is a clinical emergency that often requires swift action driven by efficient communication. Extravasation of intravenous (IV) contrast on computed tomography (CT) is a hallmark of active hemorrhage. This can be seen on exams performed for a variety of indications and can occur anywhere in the body. As both traumatic and non-traumatic etiologies of significant blood loss are clinical emergencies, exams demonstrating active bleeding are often performed in emergency departments and read by emergency radiologists. Prompt communication of these findings to the appropriate emergency medicine and surgical providers is crucial. Although many types of active hemorrhage can be managed by interventional radiology techniques, endoscopic and surgical management or clinical observation may be appropriate in certain cases. To facilitate optimal care, it is important for emergency radiologists to understand the scope of indications for embolization of bleeding by interventional radiologists (IR) and when an IR consultation is warranted. Similarly, timely comprehensive diagnostic radiology reporting including pertinent positive and negative findings tailored for IR colleagues can expedite the appropriate intervention.

Trauma in the elderly: a bilateral rectus sheath haematoma

Life expectancy has more than doubled in the last century, and a new cohort of elderly and increasingly frail patients is presenting to emergency departments with new clinical challenges. When this patient cohort presents after injury, all aspects of clinical practice have to be recalibrated to provide safe and appropriate care. The prevalence of chronic disease, levels of organ failure, multiple comorbidities, greater use of anticoagulation and incidence of recurrent low- and high-impact trauma may delay and obscure diagnosis and, ultimately, increase mortality.Older age is a risk factor for rectus sheath haematoma (RSH), which is haemorrhage into the potential space surrounding the rectus abdominis muscle/s. It is a rare presentation following trauma but can provide diagnostic challenges and be fatal. Even more rare is bilateral RSH with only 12 reported in the literature since 1981.This case report describes bilateral RSH presenting in an elderly woman following a fall and the consequences of seemingly minor trauma in the elderly.

A case of rectus sheath hematoma in the setting of paroxysmal coughing and platelet dysfunction

Rectus sheath hematoma (RSH) is an uncommon cause of acute abdominal pain that may mimic other intra-abdominal pathologies. It is caused by the rupture of the superior or inferior epigastric artery or vein in the rectus abdominis muscle. Clinical features include sudden-onset abdominal pain and a palpable mass, and common risk factors include anti-coagulants, platelet dysfunction, and cough. Workup includes a physical exam, complete blood count, coagulation profile, ultrasound, and computed tomography. While most cases are treated conservatively, uncontrolled hemorrhage may be lethal and requires prompt recognition. We discuss a case of RSH which developed in the setting of paroxysmal coughing and platelet dysfunction. The purpose is to highlight the diagnosis and treatment of RSH and emphasize the importance of its inclusion in the differential for acute abdominal pain.

The prominent role of percutaneous transarterial embolization in the treatment of anterior abdominal wall hematomas: the results of three high volume tertiary referral centers

PURPOSE

Percutaneous transarterial embolization (PTE) represents a fast, safe and effective option for life-threatening anterior abdominal wall hematomas (AWHs) and those unresponsive to conservative treatment. Our study aims to assess cumulative results of safety, technical and clinical success of PTE performed in three high-volume tertiary referral centers and to evaluate the efficacy of the different embolic materials employed.

MATERIALS AND METHODS

A consecutive series of 124 patients (72.8 ± 14.4 years) with AWHs of different etiology submitted to PTE were retrospectively collected and analyzed. Clinical success, defined as absence of recurrent bleeding within 96 h from PTE, was considered as primary endpoint. The results of the comparison of three groups based on embolic agent employed were also analyzed.

RESULTS

Spontaneous AWHs accounted for 62.1%, iatrogenic for 21.8% and post-traumatic for 16.1% of cases. SARS-CoV-19 infection was present in 22.6% of patients. The most commonly embolized vessels were epigastric inferior artery (n = 127) and superior epigastric artery (n = 25). Technical and clinical success were 97.6 and 87.1%, respectively. Angiographic signs of active bleeding were detected in 85.5% of cases. Four (4%) major complications were reported. The comparison of the three groups of embolic agents (mechanical, particulate/fluid and combined) showed no statistically significant differences in terms of clinical success. SARS-CoV-2 infection was found to be an independent factor for recurrent bleeding and poor 30-day survival.

CONCLUSION

PTE performed with all the embolic agent employed in our centers is a safe and effective tool in the treatment of life-threatening anterior AWH of each origin.

Intraarterial embolizations in life-threatening spontaneous retroperitoneal and rectus sheath hemorrhage (SRRSH): a three-center experience

PURPOSE

To retrospectively evaluate the technical and clinical success of interventional treatments employed in three University medical centers and to develop work-flow recommendations for intra-arterial embolizations in patients with life-threatening spontaneous retroperitoneal and rectus sheath hemorrhage (SRRSH).

MATERIALS AND METHODS

Retrospective evaluation of all patients with contrast-enhanced CT and digital subtraction angiography (DSA) for SRRSH from 01/2018 to 12/2022, amounted to 91 interventions in 83 patients (45f, 38m) with a mean age of 68.1 ± 13.2 years. Analysis of the amount of bleeding and embolized vessels, choice of embolization material, technical success, and 30-day mortality was performed.

RESULTS

Pre-interventional contrast-enhanced CT demonstrated active contrast extravasation in 79 cases (87%). DSA identified a mean of 1.4 ± 0.88 active bleeds in all but two interventions (98%), consisting of 60 cases with a singular and 39 cases of >1 bleeding artery, which were consecutively embolized. The majority of patients underwent embolization with either n-butyl-2-cyanoacrylate (NBCA; n=38), coils (n=21), or a combination of embolic agents (n=23). While the technical success rate was documented at 97.8%, 25 patients (30%) died within 30 days after the initial procedure, with mortality rates ranging from 25 to 86% between the centers, each following different diagnostic algorithms.

CONCLUSION

Embolotherapy is a safe therapy option with high technical success rates in patients with life-threatening SRRSH. To maximize clinical success and survival rates, we propose a standardized approach to angiography as well as a low threshold for re-angiography.

The Benign Side of the Abdominal Wall: A Pictorial Review of Non-Neoplastic Diseases

The abdominal wall is the location of a wide spectrum of pathological conditions, from benign to malignant ones. Imaging is often recommended for the evaluation of known palpable abdominal masses. However, abdominal wall pathologies are often incidentally discovered and represent a clinical and diagnostic challenge. Knowledge of the possible etiologies and complications, combined with clinical history and laboratory findings, is crucial for the correct management of these conditions. Specific imaging clues can help the radiologist narrow the differential diagnosis and distinguish between malignant and benign processes. In this pictorial review, we will focus on the non-neoplastic benign masses and processes that can be encountered on the abdominal wall on cross-sectional imaging, with a particular focus on their management. Distinctive sonographic imaging clues, compared with computed tomography (CT) and magnetic resonance (MR) findings will be highlighted, together with clinical and practical tips for reaching the diagnosis and guiding patient management, to provide a complete diagnostic guide for the radiologist.

Spontaneous rectus sheath hematoma associated with apixaban in an elderly gentleman with chronic obstructive airway disease - a case report

Background

Rectus sheath hematoma (RSH) is a relatively uncommon cause of acute abdominal pain and can be mistaken as other surgical causes of acute abdomen. A diagnosis requires high index of suspicion especially in susceptible patients, for example, in patients on anticoagulation. While anticoagulation is the commonest risk factor for RSH, direct-acting oral anticoagulants have only been very recently implicated as a potential cause with fewer than ten cases reported in the literature.

Case presentation.

An 82-year-old Chinese man with chronic obstructive airway disease, ischemic heart disease, heart failure and atrial fibrillation on apixaban presenting with acute onset of lower abdominal pain. Physical examination showed peritoneal signs with tenderness and guarding over the lower quadrants with hypotension. Computed tomography (CT) of the abdomen confirmed a large rectus sheath hematoma (RSH) without active extravasation. He was given fluid resuscitation and was managed successfully with supportive treatment and cessation of apixaban. A follow-up CT two months later showed resolving hematoma and aspirin was resumed primarily for ischemic heart disease. The patient tolerated anti-platelet therapy without recurrence of RSH. The risk factors, treatment options, prognosis and issue related to anticoagulation resumption after an episode of RSH are discussed. Reported cases of RSH associated with direct-acting oral anticoagulants are reviewed.

Conclusions

Direct-acting oral anticoagulant-associated rectus sheath hematoma is rare. With increasing use of direct-acting oral anticoagulants in multiple clinical settings, clinicians should remain vigilant of this potentially life-threatening bleeding complication when a patient presents with acute abdominal pain. Conservative treatment with cessation of anti-coagulant and supportive transfusion remains the mainstay of treatment.

Spontaneous Iliopsoas Muscle Hemorrhage-Predictors of Associated Mortality

RATIONALE AND OBJECTIVES

Spontaneous iliopsoas muscle hemorrhage (SIPH) is a rare clinical condition associated with high mortality. In this work we aimed to retrospectively investigate the predictors of mortality in a single-institution cohort of consecutive SIPH patients.

MATERIALS AND METHODS

Consecutive patients (n = 61, 30 men, 76 years [range 51-93]) with computed tomography (CT) confirmed diagnosis of SIPH were retrospectively included between January 2010 and April 2020. CT studies were assessed for signs of active bleeding, extramuscular retroperitoneal hematoma, visible sedimentation, and hematoma volume. Medication history, laboratory parameters, comorbidities, and disease management were also recorded. All parameters were subsequently examined with regard to their impact on outcome and survival. Univariate and multivariate Cox regressions were performed to identify variables associated with time to death.

RESULTS

The overall mortality was 22.9%. A total of 77% of patients received anticoagulant therapy prior to the onset of SIPH. Active bleeding in contrast enhanced CT (CECT) was the only independent variable associated with shorter survival (p = 0.01, hazard ratio 7.05 [1.45-34.20]). Hematoma volume or extramuscular retroperitoneal hematoma had no significant influence on short-term mortality.

CONCLUSION

Only active bleeding but not hematoma volume or extra-muscular bleeding is an independent risk factor for short-term mortality in patients with SIPH.

Rectus sheath hematoma: conservative, endovascular or surgical treatment? A single-center artificial neural network analysis

PURPOSE

Rectum sheath hematoma (RSH) is a rare and often misdiagnosed disease. We aimed to determine outcomes of patients affected by RSH and identify variables associated with the need of prompt intervention.

METHODS

Patients diagnosed with RSH during the period 2012-2020 were retrospectively identified. Demographics, diagnostic, and therapeutic variables were evaluated. RSH was classified with computed tomography (CT) according to the Berna system. An artificial neural network (ANN) model including 12 variables was used to identify patients that might require a prompt endovascular or surgical treatment.

RESULTS

A total of 20 patients were included for analysis; mean age was 69 (35-98) years and 14 (70%) were females. Iatrogenic injury and forceful contraction of the abdominal wall were the leading causes of RSH. Eleven (55%) patients were anticoagulated or antiaggregated. There were 3 (15%) grade 1, 5 (25%) grade 2, and 12 (60%) grade 3 RSH; 6 (30%) were treated conservatively, 10 (50%) with artery embolization, and 4 (20%) with surgery. Overall morbidity was 45% and there was no mortality in the series. According to the ANN, patients at high risk of requiring an invasive treatment were those with active extravasation on CT angiography, Berna grade III, age ≥ 65 years, hemodynamic instability, chronic use of corticosteroids, hematoma volume ≥ 1000 mL, and/or transfusion of ≥ 4 units of red blood cells.

CONCLUSION

Conservative treatment might be effective in selected patients with RSH. Our artificial neural network analysis might help selecting patients who require endovascular or surgical treatment.

Rectus Sheath Hematoma in COVID-19 Patients as a Mortal Complication: A Retrospective Report

BACKGROUND

Rectus sheath hematoma is a rare self-limited presentation that has become a concern in hospitalized COVID-19 patients receiving anticoagulant therapies.

METHOD

A retrospective multicentric study was conducted in referral hospitals affiliated with the Tehran University of Medical Science, Tehran, Iran, between June and August 2021. Patients with a confirmed diagnosis of COVID-19 that were complicated with rectus sheath hematoma during hospitalization were included. Median (lower quartile to upper quartile) was used to report the distribution of the results.

RESULT

This study was conducted on nine patients with confirmed COVID-19 pneumonia, including eight females and one male. The severity of viral pneumonia was above average in eight patients. The median age and median body mass index were 65 (55.5 to 78) years and 29.38 (23.97 to 31.71) kg/m². The duration of anticoagulant therapy was 10 (6 to 14) days, and the median length of hospital stay was 20 (10 to 23.5) days. Rectus sheath hematoma occurred after a median reduction of 4 (2.7 to 6.6) units in blood hemoglobin. Although 66.7% received ICU care and all of them were under full observation in well-equipped hospitals, the mortality rate was 55.6%.

CONCLUSION

In summary, increased levels of inflammatory markers such as lactic acid dehydrogenase along with an abrupt decrease in blood hemoglobin in COVID-19 patients should be considered as predisposing factors for rectus sheath hematoma, especially in patients with moderate to severe COVID-19 pneumonia under anticoagulant therapy. This complication had been considered a self-limited condition; however, it seems to be fatal in patients with COVID-19 pneumonia. Further studies in larger sample sizes should be conducted to find out suitable management for this complication.

A Proposed Algorithm on the Modern Management of Rectus Sheath Hematoma: A Literature Review

Rectus sheath hematoma (RSH) is a common entity with no clearly established protocol for management. Existing literature on RSH is outdated and does not incorporate modern technological advances in medicine and imaging. A total of 21 studies were included in this literature review based on PubMed and Google Scholar searches. Modern literature was selected from the last 10 years with the inclusion of three past pieces of literature. We performed a literature review to identify the latest research on RSH management and to consolidate an algorithm to help guide modern RSH treatment. Current RSH classification, scoring system, algorithm, and other predictors for treatment plan are discussed. The best RSH management requires early recognition of RSH followed by the appropriate implementation of conservative management and procedural intervention. The decision on picking the treatment of choice is assisted with the use of predictors, such as hematoma size, rate of hemoglobin drop, and the number of blood transfusions. Further studies are needed to clearly establish predictors among the different types of procedural intervention, and we hope the consolidated algorithm on current literature can help promote the standardization of protocol in the future.

Transcatheter Embolization of the Inferior Epigastric Artery: Technique and Clinical Outcomes

PURPOSE

Symptomatic rectus muscle sheath hematoma may be the result of bleeding originating from the inferior epigastric artery. We report the technique and the results from a series of consecutive patients treated by transcatheter embolization, evaluating both ipsilateral and contralateral retrograde approaches.

METHODS

This was a retrospective study including patients with verified rectus muscle sheath hematoma as a result of active extravasation from the inferior epigastric artery referred for transcatheter embolization. Technical success, clinical success and major complications were calculated. In addition, minor complications, blood transfusions required after a technically successful embolization, length of stay, peri-procedural and 30-day mortality and overall survival at 6 months were obtained. All statistical analysis was performed using SPSS.

RESULTS

Twenty-one patients (mean age = 59.67 ± 19.51 years old) were included. The cause of the bleeding in the vast majority was iatrogenic trauma (n = 12/21, 57.14%). Both contralateral (n = 12/21, 57.14%%) and ipsilateral (n = 9/21, 42.86%) retrograde approaches were used. Embolic materials included micro-coils (n = 13/20, 65%), microspheres (PVA) (n = 1/20, 5%), a combination of PVA and micro-coils (n = 5/20, 25%) and gel-foam (n = 1/20, 5%). Overall technical success was 95.2% (n = 20/21) while clinical success was achieved in all but one of the technically successful cases 95% (n = 19/20). One patient died peri-procedurally due to profound hemodynamic shock. There were no other major complications. Additional transfusion was necessary in 7 patients (n = 7/21, 33.33%). There was a significant increase in the hemoglobin levels after the embolization (7.03 ± 1.78 g/dL pre-procedure Vs 10.91 ± 1.7 g/dL post-procedure, p = 0.048). The median hospital stay was 8 days. The peri-procedure and 30-day mortality was 4.8% (n = 1/21) and 28.6% (n = 6/21) respectively. The 6-month survival was 61.9% (13/21).

CONCLUSION

Percutaneous embolization of the inferior epigastric artery is a minimally invasive method with satisfactory results. Both ipsilateral and contralateral retrograde approaches are feasible.

A case of spontaneous rectus sheath hematoma induced by lateral semi-prone positional changes during extracorporeal membrane oxygenation

Spontaneous abdominal wall hematomas are relatively rare and mainly attributed to anticoagulation and severe cough. Despite the high incidence of anticoagulation-related bleeding complications, there are no reports of spontaneous abdominal wall hematomas during extracorporeal membrane oxygenation (ECMO). We report a case of a spontaneous rectus sheath hematoma caused by alternation of the lateral semi-prone position during ECMO in a 76-year-old female patient with severe acute respiratory distress syndrome. Unfractionated heparin 12,000-14,000 units/day was administered for anticoagulation during ECMO. From Day 6 of ECMO, the patient who was under deep sedation was alternately placed in the left and right lateral semi-prone positions every 4 h, for approximately 20 h per day. On Day 12 of ECMO, the patient developed hypotension with anemia and a palpable mass in the right lower abdomen. Abdominal ultrasonographic imaging revealed a huge echo-free space centered in the right lower abdomen. Emergency contrast-enhanced computed tomography (CT) scanning showed extravasation from the superior and inferior epigastric arteries as well as a rectus sheath hematoma. Despite no apparent contrast leakage, an inferior epigastric artery embolization was undertaken because the patient was on ECMO. On Day 13 after ECMO initiation, ECMO and anticoagulation were discontinued. On CT scanning a week later, the hematoma had reduced. In conclusion, spontaneous abdominal wall hematoma is a rare and important complication that might occur during ECMO. Thus, careful physical examination should be routinely conducted when the patient is semi-prone during ECMO.

Rectus Sheath Hematoma Causing Bladder Outlet Obstruction

A 93-year-old woman on Coumadin with history of atrial fibrillation and chronic obstructive pulmonary disease (COPD) presented with urinary retention for one day. Computed tomography (CT) of abdomen and pelvis demonstrated grade 3 rectus sheath hematoma (RSH), with the hematoma dissecting between the transversalis fascia and muscle into the prevesical space. The large-sized hematoma caused compression at the bladder outflow tract causing urinary retention. In view of age and the patient being a poor surgical candidate, the patient was managed by percutaneous drain of the hematoma to reduce size to relieve urinary symptoms. The hematoma shrunk in size over the period of next few weeks and thereby avoided surgical intervention.