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Sbeit W, Basheer M, Shahin A, Khoury S, Msheael B, Assy N, Khoury T. Clinical Predictors of Gastrointestinal Bleeding Source before Computed Tomography Angiography. J Clin Med 2023; 12:7696. [PMID: 38137765 PMCID: PMC10744149 DOI: 10.3390/jcm12247696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/07/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
BACKGROUND Acute gastrointestinal bleeding (GIB) is a commonly encountered medical emergency. In cases of negative endoscopic evaluations, computed tomography angiography (CTA) is usually the next diagnostic step. To date, data regarding positive CTA examinations are lacking. We aimed to assess the clinical and laboratory parameters that predict a positive CTA examination, as demonstrated by the extravasation of contrast material into the bowel lumen. METHODS We performed a single-center retrospective study, including all patients who were admitted with GIB and who underwent CTA. Analysis was performed to compare patients' characteristics, and logistic regression was used to explore parameters associated with a positive CTA. RESULTS We included 154 patients. Of them, 25 patients (16.2%) had active GIB on CTA vs. 129 patients (83.8%) who did not. On univariate analysis, several parameters were positively associated with active GIB, including congestive heart failure (OR 2.47, 95% CI 1.04-5.86, p = 0.04), warfarin use (OR 4.76, 95% CI 1.49-15.21, p = 0.008), higher INR (OR 1.33, 1.04-1.69, p = 0.02), and low albumin level (OR 0.37, 95% CI 0.17-0.79, p = 0.01). On multivariate logistic regression analysis, only high INR (OR 1.34, 95% CI 1.02-1.76, p = 0.03) and low albumin (OR 0.3, 95% CI 0.12-0.7, p = 0.005) kept their positive association with active bleeding, while a high ASA score was negatively associated with an active GIB. CONCLUSIONS We could identify high INR and low albumin as strong predictors of active GIB, as demonstrated by positive CTA. On the other hand, comorbid patients classified by a high ASA score did not experience a higher rate of active GIB.
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Affiliation(s)
- Wisam Sbeit
- Department of Gastroenterology, Galilee Medical Center, Nahariya 221001, Israel; (W.S.); (A.S.); (T.K.)
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Maamoun Basheer
- Department of Gastroenterology, Galilee Medical Center, Nahariya 221001, Israel; (W.S.); (A.S.); (T.K.)
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Amir Shahin
- Department of Gastroenterology, Galilee Medical Center, Nahariya 221001, Israel; (W.S.); (A.S.); (T.K.)
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
| | - Sharbel Khoury
- Department of Radiology, Galilee Medical Center, Nahariya 221001, Israel; (S.K.); (B.M.)
| | - Botros Msheael
- Department of Radiology, Galilee Medical Center, Nahariya 221001, Israel; (S.K.); (B.M.)
| | - Nimer Assy
- Internal Medicine Department, Galilee Medical Center, Nahariya 221001, Israel;
| | - Tawfik Khoury
- Department of Gastroenterology, Galilee Medical Center, Nahariya 221001, Israel; (W.S.); (A.S.); (T.K.)
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed 1311502, Israel
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Krishnan H, Gopinath SCB. A potent anticoagulant hybrid of snake venom derived FIX-binding protein and anti-factor IX RNA aptamer: Assessed by in-silico and electrochemical analyses. Int J Biol Macromol 2023; 247:125740. [PMID: 37423441 DOI: 10.1016/j.ijbiomac.2023.125740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/11/2023]
Abstract
Anticoagulant therapies are crucial in the management of surgical complications as well as the prophylaxis of thrombosis. Many studies are being conducted on the Habu snake-venom anticoagulant, FIX-binding protein (FIX-Bp), for its greater potency and strong affinity to FIX clotting factor. On the other hand, the capacity to promptly reverse such acute anticoagulation is equally important. Combining a reversible anticoagulant with FIX-Bp may be advantageous in maintaining the balance between adequate anticoagulation and repealing when necessary. In this study, authors integrated FIX-Bp and RNA aptamer-based anticoagulants into a single target, FIX clotting factor, in order to achieve a robust anticoagulant effect. An in-silico and electrochemical approach were used to investigate the combination of FIX-Bp and RNA aptamers as a bivalent anticoagulant and to verify the competing or predominant binding sites of each anticoagulant. The in-silico analysis discovered that both the venom- and aptamer-anticoagulant had a strong affinity for the FIX protein at the Gla-domain and EGF-1 domain by holding 9 conventional hydrogen bonds with the binding energy of -34.859 kcal/mol. The electrochemical technique verified that both anticoagulants had different binding sites. The impedance load upon RNA aptamer binding to FIX protein was 14 %, whereas the addition of FIX-Bp caused a significant impedance rise of 37 %. This indicates that the addition of aptamers prior to FIX-Bp is a promising strategy for the conception of a hybrid anticoagulant.
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Affiliation(s)
- Hemavathi Krishnan
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), 01000 Kangar, Perlis, Malaysia
| | - Subash C B Gopinath
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), 01000 Kangar, Perlis, Malaysia; Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia; Micro System Technology, Centre of Excellence (CoE), Universiti Malaysia Perlis (UniMAP), Pauh Campus, 02600 Arau, Perlis, Malaysia; Department of Computer Science and Engineering, Faculty of Science and Information Technology, Daffodil International University, Daffodil Smart City, Birulia, Savar, Dhaka 1216, Bangladesh.
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Urgent procedures or surgeries in patients receiving oral anticoagulants: a systematic literature review. J Thromb Thrombolysis 2023; 55:197-202. [PMID: 36462135 DOI: 10.1007/s11239-022-02739-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/20/2022] [Indexed: 12/05/2022]
Abstract
There are limited data about the frequency of urgent surgical emergencies among patients receiving oral anticoagulants (OACs). We conducted a systematic literature review of Medline and EMBASE for published English-language articles of adult patients receiving oral anticoagulant treatment (vitamin K antagonists, apixaban, dabigatran, edoxaban, rivaroxaban) that reported on patients experiencing unplanned emergent or urgent surgery/procedure or trauma. Randomized trials, observational studies, and case series (50-100 cases) were included. The primary outcome was the frequency of unplanned urgent surgery or invasive procedures among OAC-treated patients with a focus on those not precipitated by the presence of major bleeding. The protocol was not registered. Funding was provided by Covis Pharmaceuticals. The search yielded 1367 potential studies of which 34 were included in the final review. One study reported the rate of urgent surgery/procedures among a large cohort of patients treated with dabigatran or warfarin for atrial fibrillation (~ 1% per year). Another study reported the rate of bleeding or urgent surgery among OAC-treated patients experiencing a fracture or trauma (0.489% per patient-year). The remaining 32 studies were cohorts of OAC-treated patients who received reversal or hemostatic therapies for major bleeding or urgent surgery. A median of 28.8% of these patients underwent surgery or invasive procedure. Urgent surgery appears to be a common, yet understudied complication during OAC treatment potentially associated with high rates of adverse outcomes. With increased eligibility for OACs, future studies evaluating the management and outcomes in this setting are needed.
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Management of Patients With Acute Lower Gastrointestinal Bleeding: An Updated ACG Guideline. Am J Gastroenterol 2023; 118:208-231. [PMID: 36735555 DOI: 10.14309/ajg.0000000000002130] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 11/17/2022] [Indexed: 02/04/2023]
Abstract
Acute lower gastrointestinal bleeding (LGIB) is a common reason for hospitalization in the United States and is associated with significant utilization of hospital resources, as well as considerable morbidity and mortality. These revised guidelines implement the Grading of Recommendations, Assessment, Development, and Evaluation methodology to propose recommendations for the use of risk stratification tools, thresholds for red blood cell transfusion, reversal agents for patients on anticoagulants, diagnostic testing including colonoscopy and computed tomography angiography (CTA), endoscopic therapeutic options, and management of antithrombotic medications after hospital discharge. Important changes since the previous iteration of this guideline include recommendations for the use of risk stratification tools to identify patients with LGIB at low risk of a hospital-based intervention, the role for reversal agents in patients with life-threatening LGIB on vitamin K antagonists and direct oral anticoagulants, the increasing role for CTA in patients with severe LGIB, and the management of patients who have a positive CTA. We recommend that most patients requiring inpatient colonoscopy undergo a nonurgent colonoscopy because performing an urgent colonoscopy within 24 hours of presentation has not been shown to improve important clinical outcomes such as rebleeding. Finally, we provide updated recommendations regarding resumption of antiplatelet and anticoagulant medications after cessation of LGIB.
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Ruiz J, López-Vinardell L, Juanes A, Riera-Magallon A, Puig M, Mangues MA. Risk factors for emergency department revisit in elderly patients with gastrointestinal bleeding secondary to anticoagulant therapy. Eur J Hosp Pharm 2022; 29:271-274. [PMID: 33293283 PMCID: PMC9660616 DOI: 10.1136/ejhpharm-2020-002426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 11/11/2020] [Accepted: 11/17/2020] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVE To evaluate the frequency of emergency department (ED) revisits among elderly patients with gastrointestinal bleeding secondary to anticoagulant treatment and identify factors associated with an increased risk of ED revisits. METHODS A 3-year retrospective observational study was designed, including elderly patients (≥65 years) with atrial fibrillation and undergoing oral anticoagulation therapy who visited the ED for gastrointestinal bleeding. To evaluate the risk factors for 30-day revisit, a multivariate analysis was designed including comorbidities, concomitant treatment, change in anticoagulant treatment and prescription of direct-acting oral anticoagulants. RESULTS 80 patients were included. At discharge, anticoagulation therapy was modified in 21 (26.2%) patients; and changed from an oral anticoagulant to heparin in 17 (21.2%) patients and to another oral anticoagulant in 4 (5.0%) patients. Anticoagulant treatment was withdrawn in 5 (6.3%) patients at discharge. Eleven (13.7%) patients revisited the ED 30 days after hospital discharge for bleeding episodes. No differences in the frequency of revisit to the ED were observed in the patients who changed their anticoagulant treatment at discharge. In the multivariate analysis, chronic kidney disease was the only factor significantly associated with revisits at 30 days. CONCLUSIONS Elderly patients who experience a first episode of gastrointestinal bleeding have a high risk of revisiting the ED for a bleeding episode, with no particular differences between the types of anticoagulant prescribed at discharge.
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Affiliation(s)
- Jesus Ruiz
- Pharmacy, Hospital de la Santa Creu i Sant Pau, Barcelona, Catalunya, Spain
| | | | - Ana Juanes
- Pharmacy, Hospital de la Santa Creu i Sant Pau, Barcelona, Catalunya, Spain
| | | | - Mireia Puig
- Emergency Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Catalunya, Spain
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Ajam T, Cumpian TL, Tilkens BL, Jahangir IA, Frost J, Ceretto C, Jahangir A. Non-vitamin K antagonist oral anticoagulants for stroke prevention in atrial fibrillation: safety issues in the elderly. Expert Rev Clin Pharmacol 2020; 13:1309-1327. [PMID: 33107345 DOI: 10.1080/17512433.2020.1842191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Non-vitamin K antagonist oral anticoagulants (NOACs) are increasingly used for stroke prevention in patients with atrial fibrillation (AF). Since NOACs are predominantly used in the elderly with AF at high risk for stroke and bleeding and with comorbidities requiring polypharmacy, it is important to assess their safety and efficacy in this population. AREAS COVERED We review changes in pharmacokinetics and pharmacodynamics observed with senescence and the effect on NOACs and drug and food interactions. We also provide an update on challenges related to NOAC use in situations that increases the risk for bleeding or require temporary discontinuation and address practical issues in the elderly AF patients managed on NOACs. Clinical studies and trials with cardiovascular outcomes reported from January 1990 to August 2020 were identified through the Medline database using PubMed, Cochrane Library, and EMBASE database. EXPERT OPINION NOACs are highly effective in preventing stroke in AF patients with non-inferior or superior efficacy to warfarin, with reduced risk of major bleeding. However, in the older-elderly, evidence comes mainly from observational studies or extrapolation from studies in populations with minimal functional limitations or comorbidities. The high upfront cost and out-of-pocket expense for copayment or deductibles also limit the use of this effective therapy in a substantial number of patients. The cost reduction may further improve long-term use for NOACs in stroke prevention in elderly patients with AF.
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Affiliation(s)
- Tarek Ajam
- Aurora Cardiovascular and Thoracic Services, Aurora Sinai/Aurora St. Luke's Medical Centers , Milwaukee, WI, USA
| | - Tabitha L Cumpian
- Aurora Cardiovascular and Thoracic Services, Aurora Sinai/Aurora St. Luke's Medical Centers , Milwaukee, WI, USA.,Center for Advanced Atrial Fibrillation Therapies , Milwaukee, WI USA
| | - Blair L Tilkens
- Aurora Cardiovascular and Thoracic Services, Aurora Sinai/Aurora St. Luke's Medical Centers , Milwaukee, WI, USA
| | | | - Jared Frost
- Pharmacy Services, Advocate Aurora Health , Milwaukee, WI, USA
| | - Cheryl Ceretto
- Aurora Cardiovascular and Thoracic Services, Aurora Sinai/Aurora St. Luke's Medical Centers , Milwaukee, WI, USA.,Center for Advanced Atrial Fibrillation Therapies , Milwaukee, WI USA
| | - Arshad Jahangir
- Aurora Cardiovascular and Thoracic Services, Aurora Sinai/Aurora St. Luke's Medical Centers , Milwaukee, WI, USA.,Center for Advanced Atrial Fibrillation Therapies , Milwaukee, WI USA
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Mycyk MB. Addressing the vexing challenge of bleeding from oral anticoagulants in the ED. Am J Emerg Med 2020; 38:1209-1210. [DOI: 10.1016/j.ajem.2020.01.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 01/27/2020] [Indexed: 11/16/2022] Open
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