21 patients (aged 28-81 years) with recent subarachnoid hemorrhage (10 saccular aneurysms, 3 arteriovenous angiomas, 8 normal angiograms) were continuously infused with tranexamic acid at a dosage of 5 g daily for up to 14 days. Therapy was surveyed by daily measurement of the available plasminogen activity (aPl) with the chromogenic substrate S-2251 and by a modified bioassay, whereby the concentration of tranexamic acid was determined thrombelastographically and expressed as antifibrinolytic equivalent. In addition, a battery of blood coagulation tests was performed daily. 5 patients died, 1 after postoperative stroke, 3 as a result of general complications during intensive care treatment, but only 1 due to rebleeding. 4 patients were successfully operated during the first week, 1 patient after 2 weeks. aPl fell from 99.2% (SEM 3.0%, n = 21) before treatment to 72.9% (SEM 3.5%, n = 21) after 24 h and to the therapeutic level between 50 and 60% from day 2 on. The mean steady state of the antifibrinolytic equivalent corresponded to about 150 micrograms/ml of tranexamic acid during infusion. Intra- and interindividual changes were relatively small for aPl, when compared with the antifibrinolytic equivalent measured by the bioassay. In 2 elderly patients tranexamic acid infusion had to be terminated because of clinical and laboratory signs of disseminated intravascular coagulation, whereby aPl fell below the therapeutic range, elucidating that this method is a sensitive indicator for a hypercoagulable state and useful for the surveillance of therapy with antifibrinoltic agents.
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http://dx.doi.org/10.1159/000115794 | DOI Listing |
J Am Acad Orthop Surg
January 2025
From the Rothman Orthopaedic Institute at Thomas Jefferson University Hospital, Philadelphia, USA (Sutton, Lizcano, Krueger, Courtney, and Purtill), and the Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, USA (Austin).
Introduction: Clinical outcome measures used under value-based reimbursement models require risk stratification of patient demographics and medical history. Only certain perioperative patient factors may be influenced by the surgeon. The study evaluated surgeon-influenced modifiable factors associated with achieving literature-defined KOOS score thresholds to serve as the foundation of the newly established alternative payment models for total knee arthroplasties (TKA).
View Article and Find Full Text PDFAnesthesiology
January 2025
Department of Anesthesiology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
Background: Tranexamic acid is an anti-fibrinolytic agent routinely used during hip and knee joint replacement surgery to minimize bleeding. Chronic kidney disease is a common chronic health problem seen among adults requiring major arthroplasty surgery. Tranexamic acid is renally cleared and may accumulate in chronic kidney disease.
View Article and Find Full Text PDFActa Orthop Traumatol Turc
December 2024
Department of Orthopedics, !e Second People's Hospital of Xiangcheng District, Suzhou, China.
Objective: The aim of this study was to examine if tranexamic acid (TXA) can assist in improving outcomes of arthroscopic rotator cu! repair (RCR).
Methods: The databases of PubMed, Embase, Web of Science, CENTRAL, and Scopus were searched for all types of studies examining the e"cacy of TXA for arthroscopic RCR. Twelve studies, 10 randomized controlled trials (RCTs), and 2 retrospective studies were considered eligible.
World J Gastrointest Surg
January 2025
Department of Gastroenterology and Hepatology/Medical Engineering Integration Laboratory of Digestive Endoscopy, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.
In this manuscript, I comment on the article by Pospisilova published in the recent issue of the journal, in which selective embolization was used to treat anorectal hemangioma, a rare disease causing lower gastrointestinal bleeding. Anorectal hemangioma can easily be mistaken; for example, the patient in this case was previously misdiagnosed with ulcerative colitis. Choosing the appropriate tests and understanding the typical manifestations of anorectal hemangioma under colonoscopy, computerized tomography, magnetic resonance imaging and other tests are beneficial for diagnosis.
View Article and Find Full Text PDFJ Orthop
July 2025
Department of Orthopaedic Surgery, St. Luke's University Health Network, Bethlehem, PA, USA.
Background: Tranexamic acid (TXA) use has become the gold standard in total joint arthroplasty to limit intraoperative blood loss and transfusion rates. More recently, the indications for TXA have expanded to knee and shoulder arthroscopy with promising early results. However, the effectiveness of TXA during arthroscopic rotator cuff repair (RCR) is unclear.
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