Effect of Aspirin, Hemodilution and Desmopressin on Platelet Dysfunction

NCT01382134 | Completed DMC

• 1 other identifier: UW 11-075
• Study Type: interventional
• Target: 60
• Locations: 1 country
• Sites: 1

Brief Summary

Study hypothesis: Desmopressin (DDAVP) can improve platelet function under influence of aspirin, hemodilution and mild hypothermia Mild hypothermia (34-35oC) is known to cause platelet dysfunction. This could lead to increased surgical bleeding and increased transfusion requirement during surgery. Although this hypothermia-induced platelet dysfunction seems to be reversible with warming, this is not always possible or desirable. Desmopressin (DDAVP) is a drug which has proven efficacy in improving platelet function in uraemic and cirrhosis patients, and in reducing blood loss in selected surgeries. In a recent study, we have found that subcutaneous injection of 1.5 mcg (1/10th the usual dose) is already sufficient to fully reverse the platelet dysfunction seen at 32oC. We have demonstrated in another study that prolongation of the bleeding time in a 20% hemodiluted sample predicts increased postoperative bleeding after total knee replacement. We have therefore designed this study as a follow up to our last two studies on DDAVP and hypothermia, to investigate whether hemodilution affects hypothermia induced platelet dysfunction and the response to DDAVP. In addition, another common cause of perioperative platelet dysfunction is the intake of COX inhibitors, particularly aspirin by patients. Therefor the effect of aspirin on hypothermia induced platelet dysfunction and the response to DDAVP, will also be investigated.

Conditions

Platelet Dysfunction; Hemodilution; Mild Hypothermia; NSAID; Desmopressin

Keywords

Platelet dysfunction; Hemodilution; Mild hypothermia; NSAID; Desmopressin

Outcome Measures

Primary Outcomes (1)

• Platelet function

  Venous blood sample will be taken from subjects before and after injection of DDAVP. Blood sample will be subjected to: (i) complete blood count, (ii) PFA-100 platelet function analyzer, (iii) fibrinogen, and (iv) vWF:Ag concentration for analysis.

  Day 6 after aspirin intake

Study Arms (2)

Placebo group

PLACEBO COMPARATOR

Subjects will be given placebo daily for 3 days. On day 4 an early morning urine sample will be collected for detection of aspirin metabolite (11-dehydro thromboxane B2). On day 6 venous blood sample will be collected, 17mls before and 17 mls after injection of DDAVP 15 microgram subcutaneously. The blood samples will then be subjected for platelet function analysis.

Drug: Placebo, desmopressin

Aspirin group

ACTIVE COMPARATOR

Subjects will be given aspirin 100mg daily for 3 days. On day 4 an early morning urine sample will be collected for detection of aspirin metabolite (11-dehydro thromboxane B2). On day 6 venous blood sample will be collected, 17mls before and 17 mls after injection of DDAVP 15microgram subcutaneously. The blood samples will then be subjected for platelet function analysis.

Drug: Aspirin, desmopressin

Interventions

Aspirin, desmopressin DRUG

Aspirin 100mg daily for 3 days Desmopressin 15 microgram subcutaneously once only

Aspirin group

Placebo, desmopressin DRUG

Placebo 1 tab daily for 3 days Desmopressin 15 microgram subcutaneously once only

Placebo group

Eligibility Criteria

• Age: 18 Years - 60 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• adult Chinese subjects aged 18-60 without known platelet disorder, thrombocytopenia, history of taking drugs that may affect platelet function including herbal preparations.

You may not qualify if:

• Any known platelet or coagulation disorder
• Expected surgical operation or dental treatment within one week of scheduled drug intake.
• Known peptic ulcer disease
• Obesity (BMI \>=30)
• Pregnant or lactating women.
• Known chronic liver or renal disease.
• Coronary artery, carotid artery or peripheral artery disease
• Recent history of taking antiplatelet drugs, anticoagulants or herbal preparations.
• Smoker or alcohol user
• Mentally incapable of providing informed consent
• Students or junior staff members who had direct working relationship with the PI

Sponsors & Collaborators

• The University of Hong Kong: lead

Study Sites (1)

Queen Mary Hospital

Hong Kong, China

Location

Related Publications (13)

• Wolberg AS, Meng ZH, Monroe DM 3rd, Hoffman M. A systematic evaluation of the effect of temperature on coagulation enzyme activity and platelet function. J Trauma. 2004 Jun;56(6):1221-8. doi: 10.1097/01.ta.0000064328.97941.fc.

  PMID: 15211129 BACKGROUND

• Cavallini M, Baruffaldi Preis FW, Casati A. Effects of mild hypothermia on blood coagulation in patients undergoing elective plastic surgery. Plast Reconstr Surg. 2005 Jul;116(1):316-21; discussion 322-3. doi: 10.1097/01.prs.0000170798.45679.7a.

  PMID: 15988284 BACKGROUND

• Michelson AD, Barnard MR, Khuri SF, Rohrer MJ, MacGregor H, Valeri CR. The effects of aspirin and hypothermia on platelet function in vivo. Br J Haematol. 1999 Jan;104(1):64-8. doi: 10.1046/j.1365-2141.1999.01146.x.

  PMID: 10027713 BACKGROUND

• Hofer CK, Worn M, Tavakoli R, Sander L, Maloigne M, Klaghofer R, Zollinger A. Influence of body core temperature on blood loss and transfusion requirements during off-pump coronary artery bypass grafting: a comparison of 3 warming systems. J Thorac Cardiovasc Surg. 2005 Apr;129(4):838-43. doi: 10.1016/j.jtcvs.2004.07.002.

  PMID: 15821652 BACKGROUND

• Schmied H, Kurz A, Sessler DI, Kozek S, Reiter A. Mild hypothermia increases blood loss and transfusion requirements during total hip arthroplasty. Lancet. 1996 Feb 3;347(8997):289-92. doi: 10.1016/s0140-6736(96)90466-3.

  PMID: 8569362 BACKGROUND

• Winkler M, Akca O, Birkenberg B, Hetz H, Scheck T, Arkilic CF, Kabon B, Marker E, Grubl A, Czepan R, Greher M, Goll V, Gottsauner-Wolf F, Kurz A, Sessler DI. Aggressive warming reduces blood loss during hip arthroplasty. Anesth Analg. 2000 Oct;91(4):978-84. doi: 10.1097/00000539-200010000-00039.

  PMID: 11004060 BACKGROUND

• Schmied H, Schiferer A, Sessler DI, Meznik C. The effects of red-cell scavenging, hemodilution, and active warming on allogenic blood requirements in patients undergoing hip or knee arthroplasty. Anesth Analg. 1998 Feb;86(2):387-91. doi: 10.1097/00000539-199802000-00032.

  PMID: 9459254 BACKGROUND

• Todd MM, Hindman BJ, Clarke WR, Torner JC; Intraoperative Hypothermia for Aneurysm Surgery Trial (IHAST) Investigators. Mild intraoperative hypothermia during surgery for intracranial aneurysm. N Engl J Med. 2005 Jan 13;352(2):135-45. doi: 10.1056/NEJMoa040975.

  PMID: 15647576 BACKGROUND

• Ying CL, Tsang SF, Ng KF. The potential use of desmopressin to correct hypothermia-induced impairment of primary haemostasis--an in vitro study using PFA-100. Resuscitation. 2008 Jan;76(1):129-33. doi: 10.1016/j.resuscitation.2007.07.009. Epub 2007 Aug 21.

  PMID: 17714852 BACKGROUND

• Ng KF, Lawmin JC, Tsang SF, Tang WM, Chiu KY. Value of a single preoperative PFA-100 measurement in assessing the risk of bleeding in patients taking cyclooxygenase inhibitors and undergoing total knee replacement. Br J Anaesth. 2009 Jun;102(6):779-84. doi: 10.1093/bja/aep091. Epub 2009 May 2.

  PMID: 19411670 BACKGROUND

• Gallinaro L, Cattini MG, Sztukowska M, Padrini R, Sartorello F, Pontara E, Bertomoro A, Daidone V, Pagnan A, Casonato A. A shorter von Willebrand factor survival in O blood group subjects explains how ABO determinants influence plasma von Willebrand factor. Blood. 2008 Apr 1;111(7):3540-5. doi: 10.1182/blood-2007-11-122945. Epub 2008 Feb 1.

  PMID: 18245665 BACKGROUND

• Mannucci PM, Capoferri C, Canciani MT. Plasma levels of von Willebrand factor regulate ADAMTS-13, its major cleaving protease. Br J Haematol. 2004 Jul;126(2):213-8. doi: 10.1111/j.1365-2141.2004.05009.x.

  PMID: 15238142 BACKGROUND

• Tsui PY, Cheung CW, Lee Y, Leung SW, Ng KF. The effectiveness of low-dose desmopressin in improving hypothermia-induced impairment of primary haemostasis under influence of aspirin - a randomized controlled trial. BMC Anesthesiol. 2015 May 28;15:80. doi: 10.1186/s12871-015-0061-5.

  PMID: 26017715 DERIVED

MeSH Terms

Interventions

Aspirin; Deamino Arginine Vasopressin

Intervention Hierarchy (Ancestors)

Salicylates; Hydroxybenzoates; Phenols; Benzene Derivatives; Hydrocarbons, Aromatic; Hydrocarbons, Cyclic; Hydrocarbons; Organic Chemicals; Arginine Vasopressin; Vasopressins; Pituitary Hormones, Posterior; Pituitary Hormones; Peptide Hormones; Hormones; Hormones, Hormone Substitutes, and Hormone Antagonists; Neuropeptides; Peptides; Amino Acids, Peptides, and Proteins; Oligopeptides; Nerve Tissue Proteins; Proteins

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Dr TSUI Pui Yee

Study Record Dates

• First Submitted: June 23, 2011
• First Posted: June 27, 2011
• Study Start: July 1, 2011
• Primary Completion: July 1, 2012
• Study Completion: September 1, 2013
• Last Updated: November 15, 2013

Record last verified: 2013-11

Locations

CN (1)