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1.
BMC Musculoskelet Disord ; 23(1): 1111, 2022 Dec 21.
Article in English | MEDLINE | ID: mdl-36539778

ABSTRACT

BACKGROUND: The use of musculoskeletal ultrasound (MSKUS) for point-of-care (POC) evaluation of hemophilic arthropathy is growing rapidly. However, the extent to which MSKUS influences clinical treatment decisions is unknown. METHODS: We conducted a three-year, prospective, multi-center study at three hemophilia treatment centers in the United States to evaluate the utilization of POC-MSKUS for routine clinical decision-making in adult persons with hemophilic arthropathy. Bilateral elbows, knees and ankles were assessed clinically [Hemophilia Joint Health Score (HJHS)] and with POC-MSKUS by the Joint TissueActivity and Damage Exam (JADE) protocol at baseline and approximately annually for two additional times. Treatment decisions, including physical therapy (PT) and "medical" (joint injections/aspirations, referrals to orthopedics, changes/adjustments of hemostatic plans, and use of oral anti-inflammatory medications) were recorded in relation to POC-MSKUS. RESULTS: Forty-four persons [median age 37 years (IQR 29, 51)], mostly with severe Hemophilia A on clotting factor prophylaxis, completed 129 visits, yielding 792 joint exams by POC-MSKUS and HJHS [median at baseline 27 (IQR 18, 42)] over a median follow up of 584 days (range: 363 to 1072). Among 157 management decisions, 70% were related to PT plans (n = 110) and 30% were "medical". Point-of-care MSKUS influenced 47/110 (43%) PT plans, mostly informing treatment of specific arthropathic joints (45/47 plans) in patients with high HJHS. Physical therapy plans influenced by POC-MSKUS directed more manual therapy/therapeutic exercises, while plans based on physical exam were focused more on global exercises and wellness. Treatment decisions were mostly based on the identification of specific musculoskeletal abnormalities visualized by POC-MSKUS. Of note 20/47 (43%) POC-MSKUS plans included de-escalation strategies, thereby reducing exercise intensity, mostly for joint instability and subclinical hemarthroses. Point-of-care MSKUS also informed 68% (32/47) of "medical" decisions, surprisingly mostly for injections/aspirations and referrals to orthopedics, and not for adjustments of hemostatic treatment. Although not formally studied, ultrasound images were used frequently for patient education. CONCLUSION: Routine joint evaluations with POC-MSKUS resulted in few changes regarding medical management decisions but had a profound effect on the formulation of PT plans. Based on these findings, new studies are essential to determine the benefit of MSKUS-informed management plans on joint health outcomes.


Subject(s)
Arthritis , Hemophilia A , Hemostatics , Adult , Humans , Hemophilia A/diagnostic imaging , Hemophilia A/therapy , Point-of-Care Systems , Prospective Studies , Hemarthrosis
3.
Haemophilia ; 24(1): 104-112, 2018 Jan.
Article in English | MEDLINE | ID: mdl-28833808

ABSTRACT

INTRODUCTION: Trenonacog alfa (IB1001) is a recombinant factor IX (rFIX) manufactured in Chinese hamster ovary (CHO) cells. IB1001 was evaluated in a multicentre clinical trial with haemophilia B patients. AIM: The aim was to establish IB1001 pharmacokinetic non-inferiority to comparator rFIX, safety and efficacy in previously treated patients (PTPs) with haemophilia B. METHODS: Subjects were severe or moderately severe haemophilia B adult and adolescent PTPs with no history of FIX inhibitors. RESULTS: IB1001 PK non-inferiority to comparator rFIX was demonstrated through ratio of AUC0-∞ in 32 subjects. IB1001 was well tolerated in all 76 treated subjects; the most common adverse drug reaction was headache (2.6% of subjects) and there were no reports of FIX inhibitors. Transient non-inhibitory binding FIX antibodies and anti-CHO cell protein antibodies developed in 21% and 29% of subjects respectively; no safety concerns were associated with development of these antibodies. Prophylaxis (mean duration ± SD: 17.9 ± 9.6 months, mean dose: 55.5 ± 12.9 IU/kg, median 1.0 infusion per week) was effective in preventing bleeds (median annual bleed rate: 1.52, interquartile range: 0.0-3.46). One or two IB1001 infusions resolved 84% of the bleeds, while for 84% of treatments haemostatic efficacy of IB1001 was rated excellent or good. IB1001 haemostatic efficacy for all 19 major surgeries was rated adequate or better than adequate. CONCLUSIONS: IB1001 is safe and efficacious for treatment of bleeds, routine prophylaxis and perioperative management in haemophilia B patients.


Subject(s)
Factor IX/therapeutic use , Hemophilia B/drug therapy , Adolescent , Adult , Area Under Curve , Blood Coagulation Factor Inhibitors/blood , Dose-Response Relationship, Drug , Double-Blind Method , Factor IX/adverse effects , Factor IX/pharmacokinetics , Half-Life , Headache/etiology , Hemophilia B/pathology , Hemorrhage/prevention & control , Humans , Male , ROC Curve , Recombinant Proteins/pharmacokinetics , Recombinant Proteins/therapeutic use , Severity of Illness Index , Treatment Outcome , Young Adult
4.
Haemophilia ; 24(2): 261-270, 2018 Mar.
Article in English | MEDLINE | ID: mdl-29218759

ABSTRACT

INTRODUCTION: Standardized and disease-specific patient-reported outcome (PRO) instruments assessing pain, functional impairment and health-related quality of life (HRQoL) in people with haemophilia (PWH) have been used in studies, but infrequently in comprehensive care settings for individual assessment or treatment planning. AIM: To assess the impact of pain and functional impairment on HRQoL in PWH. METHODS: P-FiQ enrolled 381 adult PWH with a history of joint pain/bleeding and included 5 PROs and a clinical joint evaluation (Hemophilia Joint Health Score v2.1 [HJHS]). RESULTS: Median age was 34 years; 49.9% reported a history of joint procedure or surgery. On EQ-5D-5L, most reported problems with mobility (61.4%), usual activities (53.2%) and pain/discomfort (76.1%). On Brief Pain Inventory v2 Short Form, median worst pain (range 0-10) was 6, least pain 1, average pain 3 and current pain 2. Ankles were most frequently reported as the most painful joints (37.4%), followed by knees (23.7%) and elbows (18.9%). On International Physical Activity Questionnaire, 51% reported no activity in the prior week. On SF-36v2 health survey, median subscores were worse for 4 physical health domains vs 4 mental health domains. Among Hemophilia Activities List domains (range 0 [worst]-100 [best]), functions of the legs (median, 66.7) and lying/sitting/kneeling/standing (median, 67.5) were most impacted and self-care least impacted (median, 100.0). On HJHS, ankle scores (median, 6.0; range, 0-40) were worse than elbow/knee scores (median, 4.0/4.0). Results were consistent across PROs/HJHS. CONCLUSION: Data demonstrate challenges of predominantly ankle/knee pain and lower extremity functional impairment in US adult PWH, affecting HRQoL across PROs/HJHS.


Subject(s)
Hemophilia A/complications , Hemophilia A/epidemiology , Musculoskeletal Pain/etiology , Patient Reported Outcome Measures , Adult , Female , Hemophilia A/pathology , Humans , Male , Middle Aged , Musculoskeletal Pain/pathology , Pain , Quality of Life , United States
5.
Haemophilia ; 23(6): 832-843, 2017 Nov.
Article in English | MEDLINE | ID: mdl-28776894

ABSTRACT

INTRODUCTION: Haemophilia A or B patients with inhibitors have been treated with FVIIa-containing bypassing agents for over 20 years. However, due to uncertainty regarding dose response and thrombotic risk, the use of a gradual, titrated, minimal dosing strategy remains prevalent, potentially hampering early haemostasis. AIM: Evaluate the dose-dependent efficacy, safety and immunogenicity of activated eptacog beta (rhFVIIa), a new recombinant inhibitor bypassing agent for the treatment of bleeding episodes (BEs). METHODS: A Phase 3, randomized, cross-over study of initial dose regimens (IDRs) in 27 bleeding congenital haemophilia A or B subjects with inhibitors was conducted to evaluate on-demand treatment of mild/moderate BEs. Intravenous 75 µg/kg or 225 µg/kg initial doses with 75 µg/kg subsequent doses by schedule were administered until clinical response. RESULTS: The primary endpoint was sustained clinical response within 12 hours, determined by a composite of objective and pain measures. In the 75 µg/kg IDR, 84.9% (95% CI; 74.0%, 95.7%) of mild/moderate BEs at 12 hours were successfully treated compared to 93.2% (95% CI; 88.1%, 98.3%) treated in the 225 µg/kg IDR. Efficacy between the IDRs was statistically different (P<.020) in mild/moderate bleeding episodes. Both IDRs were well tolerated with no detectable immunogenic or thrombotic responses to rhFVIIa or host cell proteins. CONCLUSION: The dose-dependent efficacy seen in this study supports individualizing the initial dose of eptacog beta to optimize clinical response. By reducing uncertainty, the PERSEPT 1 results should increase the adoption of early haemostasis as a treatment goal for clinicians who treat haemorrhage in the inhibitor population.


Subject(s)
Factor VIIa/therapeutic use , Hemophilia A/drug therapy , Hemophilia B/drug therapy , Hemorrhage/drug therapy , Recombinant Proteins/therapeutic use , Adolescent , Adult , Cross-Over Studies , Dose-Response Relationship, Drug , Factor VIIa/administration & dosage , Factor VIIa/adverse effects , Headache/chemically induced , Hemarthrosis/chemically induced , Humans , Male , Middle Aged , Prospective Studies , Recombinant Proteins/administration & dosage , Recombinant Proteins/adverse effects , Young Adult
6.
Haemophilia ; 23(6): 821-831, 2017 Nov.
Article in English | MEDLINE | ID: mdl-28752639

ABSTRACT

BACKGROUND: While there is substantial literature addressing the principles of general management of haemophilia, literature on perioperative management of haemostasis is scarce. OBJECTIVE: The aim of this study was to better understand perioperative management among congenital haemophilia B patients (without inhibitors) and to gain insights into real-world surgical practices. METHOD: A systematic literature review, with an emphasis on haemophilia B, was conducted using EMBASE® , Medline® and the Cochrane Library. Studies from 1974 to June 2015 were accessed, and 132 studies were eligible for the full-study review. An international expert panel with five haematologists and one surgeon reviewed the resulting literature and provided further insights. RESULTS: The literature review revealed that documented experience in the perioperative management of bleeding risk in haemophilia B patients is relatively scarce. Therefore, the review was amended to provide a comprehensive overview of the perioperative management for haemophilia A and B patients; the expert panel applied a particular focus to haemophilia B. Several gaps were identified in the literature including the lack of consensus on defining surgery in terms of bleeding risk, optimal factor levels during surgery and lack of robust evidence on surgical outcomes. The ensuing discussions with the expert panel provided validation of some of the results from the systematic literature review and proposed future directions for perioperative management. Suggestions included collaboration with haemophilia treatment centres (HTCs) to collect real-world data on perioperative management, establishing the need for optimal factor level monitoring practice, and the appropriate adoption of extended half-life products in clinical settings.


Subject(s)
Antifibrinolytic Agents/therapeutic use , Factor IX/therapeutic use , Hemophilia B/drug therapy , Hemophilia B/surgery , Humans , Length of Stay , Perioperative Period , Surgical Procedures, Operative/methods , Treatment Outcome
7.
Haemophilia ; 23(4): 556-565, 2017 Jul.
Article in English | MEDLINE | ID: mdl-28419637

ABSTRACT

INTRODUCTION: Haemophilia is characterized by frequent haemarthrosis, leading to acute/chronic joint pain. AIM: To assess self-reported prevalence, description and management of pain in adult males with mild-to-severe haemophilia and history of joint pain/bleeding. METHODS: Participants completed a pain survey and five patient-reported outcome instruments assessing pain, functional impairment and health-related quality of life (HRQoL). RESULTS: Of 381 participants enrolled, median age was 34 years; 77% had haemophilia A, 71% had severe disease and 65% were overweight/obese. Many (56%) were not receiving routine infusions; 30% never received routine infusions. During the prior 6 months, 20% experienced acute pain, 34% chronic pain and 32% both acute/chronic pain. Subjects with both acute/chronic pain (vs. none, acute or chronic) were more likely to be depressed (30% vs. 0-15%), obese (35% vs. 20-29%) and have lower HRQoL (mean EQ-5D visual analog scale, 69 vs. 83-86) and function (median overall Hemophilia Activities List, 60 vs. 88-99). Most common analgesics used for acute/chronic pain during the prior 6 months were acetaminophen (62%/55%) and non-steroidal anti-inflammatory drugs (34%/49%); most common non-pharmacologic strategies were ice (65%/33%) and rest (51%/33%). Hydrocodone-acetaminophen was the most common opioid for both acute/chronic pain (30%); other long-acting opioids were infrequently used specifically for chronic but not acute pain (morphine, 7%; methadone, 6%; fentanyl patch, 2%). CONCLUSION: Patients with chronic pain, particularly those with both acute/chronic pain, frequently experience psychological issues, functional disability and reduced HRQoL. Treatment strategies for acute pain (e.g. routine infusions to prevent bleeding) and for chronic pain (e.g. long-acting opioids) may be underused.


Subject(s)
Hemophilia A/epidemiology , Hemophilia A/physiopathology , Pain Management/statistics & numerical data , Pain/complications , Quality of Life , Self Report , Adult , Female , Hemophilia A/complications , Humans , Male , Middle Aged , Prevalence
8.
Haemophilia ; 23(3): 392-399, 2017 May.
Article in English | MEDLINE | ID: mdl-28220631

ABSTRACT

INTRODUCTION: The Phase 3 A-LONG study demonstrated the safety and efficacy of rFVIIIFc for the control and prevention of bleeding episodes in severe haemophilia A. AIM: To describe the treatment of bleeding episodes with rFVIIIFc in the A-LONG study. METHODS: A-LONG subjects (<1 IU dL-1 endogenous FVIII) were treated with individualized prophylaxis (Arm 1), weekly prophylaxis (Arm 2) or episodic treatment (Arm 3). Information recorded for each bleeding episode included type, location and dose to treat the episode. RESULTS: During A-LONG, 757 bleeding episodes occurred during the efficacy period; the majority [456 (60%)] occurred in Arm 3 (episodic treatment). Of 93 subjects in the prophylaxis arms who entered the study with target joints, 43 (60%) in Arm 1 and 11 (52%) in Arm 2 did not experience a target joint bleed. Overall, 98% of bleeding episodes (and 98% of bleeds involving a target joint) resolved with one or two infusions; the median dose per infusion to treat a bleed was 27 IU kg-1 (27 IU kg-1 for target joints). Using population pharmacokinetic simulations, FVIII activity levels were predicted to be below the upper limit of normal (150 IU dL-1 ) in most patients in the event that rFVIIIFc is used to treat a bleeding episode in close proximity to a prophylactic dose. CONCLUSIONS: These findings demonstrate the efficacy of rFVIIIFc for the treatment of acute bleeding episodes in subjects with severe haemophilia A, regardless of treatment regimen.


Subject(s)
Factor VIII/therapeutic use , Hemophilia A/complications , Hemorrhage/complications , Hemorrhage/drug therapy , Immunoglobulin Fc Fragments/genetics , Recombinant Fusion Proteins/therapeutic use , Factor VIII/adverse effects , Factor VIII/pharmacokinetics , Female , Hemophilia A/prevention & control , Humans , Male , Recombinant Fusion Proteins/adverse effects , Recombinant Fusion Proteins/pharmacokinetics , Safety , Treatment Outcome
10.
J Thromb Haemost ; 12(11): 1788-800, 2014 Nov.
Article in English | MEDLINE | ID: mdl-25196897

ABSTRACT

BACKGROUND: Routine prophylaxis with replacement factor VIII (FVIII) - the standard of care for severe hemophilia A - often requires frequent intravenous infusions (three or four times weekly). An FVIII molecule with an extended half-life could reduce infusion frequency. The A-LONG study established the safety, efficacy and prolonged pharmacokinetics of recombinant FVIII Fc fusion protein (rFVIIIFc) in previously treated adolescents and adults with severe hemophilia A. OBJECTIVE: In this post hoc analysis, we investigated the relationship between subjects' prestudy (FVIII) and on-study (rFVIIIFc) regimens. METHODS: We analyzed two subgroups of subjects: prior prophylaxis and on-study individualized prophylaxis (n = 80), and prior episodic treatment and on-study weekly prophylaxis (n = 16). Subjects' prestudy dosing regimens and bleeding rates were compared with their final rFVIIIFc regimens and annualized bleeding rates (ABRs) in the last 3 months on-study. Dosing regimen simulations based on population pharmacokinetics models for rFVIII and rFVIIIFc were performed. RESULTS: As compared with their prestudy regimen, 79 of 80 (98.8%) subjects on individualized rFVIIIFc prophylaxis decreased their infusion frequency. Overall ABRs were low, with comparable factor consumption. Longer dosing intervals, including 5-day dosing, were associated with higher baseline von Willebrand factor antigen levels. Simulated dosing regimens predicted a greater proportion of subjects with steady-state FVIII activity trough levels of ≥ 1 IU dL(-1) (1%) with rFVIIIFc than with equivalent rFVIII regimens. CONCLUSION: These results suggest that patients on rFVIIIFc prophylaxis can reduce their infusion frequency as compared with their prior FVIII regimen while maintaining low bleeding rates, affording more patients trough levels of ≥ 1 IU dL(-1) than with rFVIII products requiring more frequent dosing regimens.


Subject(s)
Coagulants/administration & dosage , Factor VIII/administration & dosage , Hemophilia A/drug therapy , Hemorrhage/prevention & control , Hemostasis/drug effects , Immunoglobulin Fc Fragments/administration & dosage , Recombinant Fusion Proteins/administration & dosage , von Willebrand Factor/metabolism , Adolescent , Adult , Biomarkers/blood , Coagulants/adverse effects , Coagulants/blood , Coagulants/pharmacokinetics , Computer Simulation , Drug Administration Schedule , Drug Monitoring , Factor VIII/adverse effects , Factor VIII/pharmacokinetics , Half-Life , Hemophilia A/blood , Hemophilia A/diagnosis , Hemorrhage/chemically induced , Humans , Immunoglobulin Fc Fragments/adverse effects , Immunoglobulin Fc Fragments/blood , Infusions, Intravenous , Male , Models, Biological , Recombinant Fusion Proteins/adverse effects , Recombinant Fusion Proteins/blood , Recombinant Fusion Proteins/pharmacokinetics , Severity of Illness Index , Time Factors , Treatment Outcome , Young Adult
11.
Haemophilia ; 18(6): 881-7, 2012 Nov.
Article in English | MEDLINE | ID: mdl-22764744

ABSTRACT

IB1001 trenacog alfa is an investigational recombinant factor IX (FIX) for the treatment and prevention of bleeding in individuals with haemophilia B. To compare the pharmacokinetics (PK) of IB1001 with nonacog alfa in individuals with haemophilia B and to assess the relationship between sialylation and PK of IB1001 (NCT00768287). A randomized, double-blind, non-inferiority, cross-over study conducted in participants aged ≥ 12 years weighing ≥ 40 kg, with severe or moderately severe haemophilia B (FIX activity ≤ 2 IU dL (-1) ). PK parameters were derived using observed FIX concentration levels and actual PK sampling times, and repeated in a subset of participants who had received IB1001 prophylaxis for 4-18 months. A retrospective analysis was conducted in subgroups according to the sialylation levels of IB1001 (50.8, 57.8-59.0%, or 71.7%). In the 32 adolescent and adult males evaluated, there were no clinically meaningful differences in PK parameters between those receiving IB1001 75 IU kg(-1) or nonacog alfa. The lower limit of the one-sided 95% confidence interval for the ratio of AUC(0-t) and AUC(0-∞) (IB1001/nonacog alfa) was 0.90, establishing non-inferiority. Terminal phase half-lives were similar (29.7 ± 18.2 h for IB1001 and 33.4 ± 21.2 h for nonacog alfa). The PK results were stable for up to 18 months of IB1001 exposure; the impact of sialylation levels was not clinically meaningful. There were no clinically meaningful PK differences between IB1001 and nonacog alfa. IB1001 was well tolerated and without safety concerns. The non-inferiority of IB1001 to nonacog alfa supports IB1001 becoming a useful alternative recombinant agent for the management of haemophilia B.


Subject(s)
Factor IX/pharmacokinetics , Hemophilia B/drug therapy , Recombinant Proteins/pharmacokinetics , Sialic Acids/analysis , Adolescent , Adult , Area Under Curve , Cross-Over Studies , Double-Blind Method , Factor IX/analysis , Factor IX/genetics , Half-Life , Humans , Male , Middle Aged , Recombinant Proteins/analysis , Recombinant Proteins/chemistry , Recombinant Proteins/genetics , Retrospective Studies , Young Adult
12.
Haemophilia ; 18 Suppl 2: 37-45, 2012 May.
Article in English | MEDLINE | ID: mdl-22530577

ABSTRACT

We are entering a new phase in the management of patients with bleeding disorders such as haemophilia. This is the result of the positive effects that disease management strategies have had on patient longevity over the last 10-15 years. A greater number of individuals are entering middle- to old-age and, as a result, we face a new era of having to manage haemophiliac patients at risk of, or suffering from, age-related diseases. We can clearly learn from the experiences of geriatricians who have made many advances in the management of chronic disorders such as cardiovascular diseases and osteoporosis. However, the hypocoagulable state brings challenges of its own and it is important that we communicate our experiences so that the shared information can help drive improved levels of care and better clinical outcomes. In this article we look at factors that have impacted the life expectancy of patients with haemophilia over the last few decades, and we also review some of the early literature relating to cardiovascular risk management and the treatment of osteoporosis.


Subject(s)
Cardiovascular Diseases/complications , Hemophilia A/complications , Osteoporosis/complications , Aged , Blood Coagulation Factors/therapeutic use , Bone Density/physiology , Comorbidity , Hemophilia A/drug therapy , Hemophilia A/physiopathology , Humans , Life Expectancy , Middle Aged , Osteoporosis/physiopathology , Risk Factors
13.
J Thromb Haemost ; 10(3): 359-67, 2012 Mar.
Article in English | MEDLINE | ID: mdl-22212248

ABSTRACT

BACKGROUND: Prophylaxis with factor (F)VIII is considered the optimal treatment for managing hemophilia A patients without inhibitors. OBJECTIVES: To compare the efficacy of two prophylaxis regimens (primary outcome) and of on-demand and prophylaxis treatments (secondary outcome), and to continue the evaluation of immunogenicity and overall safety of the ADVATE Antihemophilic Factor (Recombinant), Plasma/Albumin Free Method (rAHF-PFM). PATIENTS/METHODS: Previously on-demand-treated patients aged 7-59 years (n = 66) with FVIII levels ≤ 2% received 6 months of on-demand treatment and then were randomized to 12 months of either standard (20-40 IU kg(-1) every other day) or pharmacokinetic (PK)-tailored (20-80 IU kg(-1) every third day) prophylaxis, both regimens intended to maintain FVIII trough levels at or above 1%. Efficacy was evaluated in terms of annualized bleeding rates (ABRs). As subjects were first treated on-demand and then on prophylaxis, statistical comparisons between these treatments were paired. RESULTS: Twenty-two (33.3%) subjects on prophylaxis experienced no bleeding episodes, whereas none treated on-demand were free from an episode of bleeding. ABRs for the two prophylaxis regimens were comparable, whereas differences between on-demand and either prophylaxis were statistically significant (P < 0.0001): median (interquartile range [IQR]) ABRs were 43.9 (21.9), 1.0 (3.5), 2.0 (6.9) and 1.1 (4.9) during on-demand treatment, standard, PK-tailored and any prophylaxis, respectively. There were no differences in FVIII consumption or adverse event rates between prophylaxis regimens. No subject developed FVIII inhibitors. CONCLUSIONS: The present study demonstrates comparable safety and effectiveness for two prophylaxis regimens and that prophylaxis significantly reduces bleeding compared with on-demand treatment. PK-tailored prophylaxis offers an alternative to standard prophylaxis for the prevention of bleeding.


Subject(s)
Coagulants/administration & dosage , Factor VIII/administration & dosage , Hemophilia A/drug therapy , Hemorrhage/prevention & control , Adolescent , Adult , Child , Coagulants/adverse effects , Coagulants/pharmacokinetics , Drug Administration Schedule , Drug Monitoring , Europe , Factor VIII/adverse effects , Factor VIII/pharmacokinetics , Hemophilia A/blood , Hemophilia A/complications , Hemorrhage/blood , Hemorrhage/etiology , Humans , Male , Middle Aged , Recombinant Proteins/administration & dosage , Time Factors , Treatment Outcome , United States , Young Adult
14.
J Thromb Haemost ; 9(11): 2229-34, 2011 Nov.
Article in English | MEDLINE | ID: mdl-21883884

ABSTRACT

BACKGROUND: Inhibitors are a serious complication for patients with severe hemophilia A. Immune tolerance induction (ITI) is the primary method for eradicating these inhibitors. The role of type of concentrate and in particular the use of von Willebrand factor-containing, plasma-derived factor VIII (VWF/pd-FVIII) concentrate in primary or rescue ITI remains unclear. OBJECTIVES: To report retrospective collection of data on the use of a single VWF/pd-FVIII concentrate in primary and rescue ITI. METHODS: Retrospective chart review of hemophilia A inhibitor patients at 11 US institutions who received VWF/pd-FVIII concentrate in primary or rescue ITI. RESULTS: Primary ITI was carried out in eight inhibitor patients with a 75% complete and partial success. Secondary ITI was carried out in 25 inhibitor patients, with 52% attaining complete or partial success. CONCLUSIONS: This report represents the largest group of primarily pediatric, high-titer inhibitor patients treated with a single VWF/pd-FVIII concentrate. It adds retrospective data to the use of VWF-containing plasma-derived factor VIII concentrate in primary and rescue ITI, particularly in those patients with characteristics of poor response to ITI.


Subject(s)
Factor VIII/therapeutic use , Hemophilia A/drug therapy , Immune Tolerance/drug effects , von Willebrand Factor/therapeutic use , Child , Child, Preschool , Cohort Studies , Drug Combinations , Factor VIII/immunology , Hemophilia A/immunology , Humans , Infant , Retrospective Studies , United States , von Willebrand Factor/immunology
15.
Haemophilia ; 17(5): e870-6, 2011 Sep.
Article in English | MEDLINE | ID: mdl-21435116

ABSTRACT

In older men with haemophilia, arthropathy resulting from a lifetime of intra-articular bleeding contributes to the loss of independence and increased morbidity that occurs with age. A regular exercise programme that incorporates aerobics, strength training and balance and flexibility activities is a key component of successful ageing, helping to improve functional mobility and reduce the risk of falls, osteoporosis and osteoporotic fractures. Because of the special challenges associated with haemophilia, which include both the underlying coagulopathy and, in many cases, extensive joint damage, patients beginning an exercise regimen should be referred to appropriately trained physiotherapists (preferably someone associated with a haemophilia treatment centre) for evaluation, education and instruction and follow-up. Various assistive devices may make exercise easier to perform and more comfortable.


Subject(s)
Accidental Falls/prevention & control , Exercise Therapy , Hemarthrosis/rehabilitation , Hemophilia A/complications , Osteoporosis/prevention & control , Aged , Aged, 80 and over , Humans , Male
16.
Haemophilia ; 17(1): e196-201, 2011 Jan.
Article in English | MEDLINE | ID: mdl-20618876

ABSTRACT

While coagulation factor replacement is essential in surgical intervention in haemophilia B patients, few studies are available on the safety and efficacy of plasma-derived factor IX (FIX) for haemostasis during surgery. This retrospective study examined outcomes in these patients. A total of 20 patients who underwent 29 surgical procedures at the Hemophilia Treatment Center at Orthopaedic Hospital in Los Angeles, California, were identified and their inpatient charts were reviewed and abstracted. Outcomes included pre- and postoperative FIX dosing, recovery of FIX, blood loss, use of blood products, safety and haemostatic response. Identified patients had mild (10%), moderate (15%) or severe (75%) haemophilia B, and average age at surgery was 48.5 years. All surgical procedures were major (orthopaedic 89.7%; abdominal 10.3%), all were completed under general anaesthesia, and average time in surgery was 3.25 h. Average hospital length of stay was 11.0 days [standard deviation (SD) = 8.5] and all patients were discharged home. All patients were treated with AlphaNine® SD at an average dose of 254.9 IU kg(-1) (SD = 65.4) on the day of surgery and the dose was adjusted over the course of hospital stay. Mean perioperative blood loss was 255.5 mL (SD = 283.1) and blood replacement was required in only two surgeries (6.9%). FIX recovery analysis performed preoperatively related well to FIX levels obtained. Identified patients had little blood loss perioperatively and had no bleeding related complications. Plasma-derived FIX pre- and postoperatively appeared to be a safe and effective treatment in haemophilia B patients undergoing surgery.


Subject(s)
Factor IX/therapeutic use , Hemophilia B/drug therapy , Hemophilia B/surgery , Hemostasis, Surgical/methods , Adult , Aged , Aged, 80 and over , Blood Loss, Surgical/prevention & control , Factor IX/analysis , Female , Humans , Length of Stay , Male , Middle Aged , Outcome Assessment, Health Care , Postoperative Care , Preoperative Care , Retrospective Studies
18.
Haemophilia ; 15(6): 1197-209, 2009 Nov.
Article in English | MEDLINE | ID: mdl-19686466

ABSTRACT

The availability of safe replacement clotting factor concentrates together with effective antiviral drugs to treat human immunodeficiency and hepatitis C viruses and the provision of care at designated haemophilia treatment centres have resulted in a new phenomenon in haemophilia management - the ageing patient. Today, increasing numbers of persons with haemophilia (PWH) are middle-aged and older, and they face the same age-related health issues as the general population. The impact of these risks on PWH is unclear, however, and there is a paucity of information about how to manage comorbidities in this patient population. This review focuses on five comorbidities that uniquely affect older PWH: cardiovascular disease, liver disease, cancer, renal disease and joint disease. Available research is summarized and potential management approaches are suggested.


Subject(s)
Hemophilia A/complications , Aged , Blood Coagulation Factors/therapeutic use , Cardiovascular Diseases/complications , Cardiovascular Diseases/drug therapy , Cardiovascular Diseases/epidemiology , Comorbidity , Factor VIII/therapeutic use , Hemophilia A/drug therapy , Hemophilia A/epidemiology , Humans , Joint Diseases/complications , Joint Diseases/drug therapy , Joint Diseases/epidemiology , Kidney Failure, Chronic/complications , Kidney Failure, Chronic/drug therapy , Kidney Failure, Chronic/epidemiology , Liver Diseases/complications , Liver Diseases/drug therapy , Liver Diseases/epidemiology , Male , Middle Aged , Neoplasms/complications , Neoplasms/drug therapy , Neoplasms/epidemiology , Practice Guidelines as Topic , Risk Assessment
19.
Haemophilia ; 14(3): 504-12, 2008 May.
Article in English | MEDLINE | ID: mdl-18218011

ABSTRACT

Although the severity of haemophilic arthropathy is commonly assessed using established radiographic scoring systems, there is limited available information about their inter- and intra-observer reliability. The purpose of the present study was to establish the inter-observer reliability (IEOR) and intra-observer reliability (IAOR) of three different methods available for the classification of haemophilic arthropathy, including the Arnold and Hilgartner classification, a modification to the Arnold and Hilgartner system described by Luck et al., and the classification described by Pettersson et al. Antero-posterior and lateral radiographs of 54 haemophilic joints were included for the analysis. To determine the IEOR for each one of the three radiographic systems, the radiographs were randomly evaluated by four observers, including two orthopaedic surgeons, one orthopaedic resident and one haematologist. For the determination of IAOR, all four reviewers repeated the assessment in a similar fashion, after a period of at least 2 weeks. IEOR and IAOR for the three classification systems was established using kappa (kappa) statistics. A Spearman rank correlation was used to determine the similarities between each reviewer's own interpretative scales. The IEOR was low for the Arnold and Hilgartner system (kappa = 0.35, P < or = 0.001) and the Luck system (kappa = 0.38, P < or = 0.001), but even lower for the Pettersson system (kappa = 0.06, P = 0.1). For the Pettersson system, particularly low kappa values were observed for the presence or absence of osteoporosis (kappa = 0.11, P = 0.0027), enlarged epiphysis (kappa = 0.10, P = 0.0039), erosion of joint margins (kappa = 0.11, P = 0.0018), and joint deformity (kappa = 0.16, P = 0.00001). However, a relatively high Spearman rank correlation for all three scales [r(s) = 0.75 (P < 0.001) for Arnold and Hilgartner system, r(s) = 0.74 (P < 0.001) for the Luck system and r(s) = 0.81 (P < 0.001) for Pettersson system] indicated an overall, general agreement among the reviewers with regard to the severity of the haemophilic arthropathy. There was a moderate IAOR value for both, the Arnold and Hilgartner system (kappa = 0.57, P = 0.00001) and the Luck system (kappa = 0.62, P = 0.00001) with a low IAOR value for the Pettersson system [kappa = 0.22, P = 0.00001). Currently available radiographic scoring systems for haemophilic arthropathy have low inter- and intra-observer reliability rates. Improvements, either through education or modification of the scoring systems, are critical in an era where correlations between clinical and radiographic scores have received significant attention.


Subject(s)
Hemarthrosis/pathology , Hemophilia A/diagnostic imaging , Joint Diseases/diagnostic imaging , Severity of Illness Index , Disease Progression , Hemarthrosis/etiology , Hemophilia A/complications , Hemophilia A/pathology , Humans , Joint Diseases/pathology , Joints/pathology , Radiography , Reproducibility of Results
20.
Haemophilia ; 10(6): 727-31, 2004 Nov.
Article in English | MEDLINE | ID: mdl-15569168

ABSTRACT

Patients with haemophilia are at increased risk of hepatitis C infection because of prior transfusion of blood products. Virtually all haemophiliacs who received pooled blood products before the mid-1980s have been infected with hepatitis C. A liver biopsy is important to identify the extent of liver disease, and to help determine the necessity of interferon therapy. With factor replacement, in-hospital liver biopsy is safe. Thirty patients with haemophilia were evaluated for chronic hepatitis C infection. Eleven patients subsequently underwent successful transjugular liver biopsy in the outpatient setting after appropriate factor replacement. Mean +/- SD pre- and posthaemoglobin values were 15.8 +/- 0.79 and 14.4 +/- 0.71 g dL(-1) (P = ns). There was no significant change in heart rate, systolic or diastolic blood pressure during the monitoring period (P = ns) and no major complication was noted in perioperative follow-up. The mean length of the liver biopsy specimens was 1.7 +/- 0.3 cm, mean grade was 2 +/- 0.6 and mean stage was 2.3 +/- 1.2. Our experience demonstrates that outpatient transjugular liver biopsy can be safely performed in patients with haemophilia in the outpatient setting, avoiding the cost and need for hospital admission.


Subject(s)
Hemophilia A , Hepatitis C, Chronic/diagnosis , Liver/pathology , Adult , Ambulatory Surgical Procedures , Biopsy/methods , Factor IX/analysis , Factor VIII/analysis , Factor VIII/therapeutic use , Humans , Male , Postoperative Complications/prevention & control
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