31 October 2024 (Thursday) - BTLP-TACT Exercise

Being at a loose end I did another BTLP-TACT exercise. It gave me two cases
 

37718 – a sixty-two year old woman in A&E with a CVA needing group & save

She grouped as O Rh(D) Positive with antibody screen positive in cells 1 & 3. I requested antibody panels. The IAT panel was positive in cells 1, 3, 6, 9 and 10 corresponding with anti-Fy(a) but not ruling out anti-Cw or anti-Lu(a). The enzyme panel was negative which did rule out anti-Cw and anti-Lu(a).

98389 – an eighty-seven year old woman in out-patients also needing group & save.

Her ABO and Rh(D) groups were both indeterminate, and the antibody screen was positive in cell 2. I requested antibody panels. The IAT and enzyme panels were positive in cells 2 and 6 corresponding to anti-K .

 
I got the thumbs-up

29 October 2024 (Tuesday) - GMP e-learning

I did my Good Manufacturing Practice e-learning today. A useful little refresher…

29 October 2024 (Tuesday) - Westgard QC Update

The nice people at Westgard sent their newsletter today. It was a tad dry and a tad heavy going, but as always was one of the better sources of CPD. When you consider that much of what we do in the lab at the most basic level is measure stuff, working out just how good our measuring is must be pretty much fundamental to what we do.


28 October 2024 (Monday) - Transfusion Evidence Library Update

The nice people at the Transfusion Evidence Alert sent their update today. Some of it was a tad clinical, some a tad specialized, and (again) tranexamic acid features (it does that a lot).

ARTICLE OF THE MONTH

Intravenous versus oral iron for anaemia among pregnant women in Nigeria (IVON): an open-label, randomised controlled trial.
Afolabi, B.B., et al. (2024). The Lancet. Global Health.
PICO Summary available

+++++

TOP ARTICLES

TC-325 superiority in malignant gastrointestinal bleeding - an individual patient data meta-analysis of randomized trials.
Alali, A.A., et al. (2024). The American Journal of Gastroenterology. [Record in progress].

Pomalidomide for epistaxis in hereditary hemorrhagic telangiectasia.
Al-Samkari, H., et al. (2024). The New England Journal of Medicine.

The efficacy, safety and effectiveness of hyperoncotic albumin solutions in patients with sepsis: a systematic review and meta-analysis.
Bannard-Smith, J., et al. (2024). Journal of the Intensive Care Society.

Outcomes of kidney transplantation in highly HLA-sensitized patients treated with intravenous immuno-globulin, plasmapheresis and rituximab: a meta-analysis.
Chandramohan, D., et al. (2024). Life.

Balancing donor health and plasma collection: a systematic review of the impact of plasmapheresis frequency.
D'Aes, T., et al. (2024). Transfusion Medicine Reviews. [Record in progress].

An evaluation of diethylhexyl phthalate free top & bottom in-line blood collection set with a new soft housing filter.
Danilova, E., et al. (2024). Transfusion Medicine. [Record in progress].

The cost-effectiveness of preventing, diagnosing, and treating postpartum haemorrhage: a systematic review of economic evaluations.
Ginnane, J.F., et al. (2024). PLoS Medicine.

Efficacy and safety of recombinant human thrombopoietin for the treatment of chronic primary immune thrombocytopenia in children and adolescents: a multicentre, randomized, double-blind, placebo-controlled phase III trial.
Ma, J., et al. (2024). British Journal of Haematology. [Record in progress].

Intraoperative tranexamic acid administration in cranial meningioma surgery: a meta-analysis of prospective randomized, double-blinded, and placebo-controlled trials.
Vychopen, M., et al. (2024). Frontiers in Oncology.

28 October 2024 (Monday) - Learning Monday

A normocytic anaemia with incredibly low ferritin? But stomach cancer… this is an anaemia due to a deficiency of both iron and vitamin B12.
 
I got it right.

27 October 2024 (Sunday) - Slide Saturday (!) Challenge

Saw this yesterday… Looks like haemoglobin C crystals to me…
Tuned in late today – it was. “The blood smear shows Hemoglobin C (HbC) crystals in a patient with hemoglobin C disease. HbC crystals form when a mutation in the beta-globin chain of hemoglobin replaces glutamic acid with lysine. This mutation makes HbC less soluble than HbA, forming hexagonal crystals (HbC crystals as seen in the peripheral smear). Individuals with one HbA gene and one HbC gene exhibit the HbC trait and are typically asymptomatic. In contrast, those with homozygous mutations for HbC have hemoglobin C disease, characterized by mild and chronic hemolytic anemia.

26 October 2024 (Saturday) - FFP & Cryoprecipitate

Following on from the last BTLP-TACT exercise, I had a little look on Google to remind myself…

 

Fresh frozen plasma (FFP) is recommended for a variety of conditions, including:

 

·        Bleeding

FFP is used to prevent or stop bleeding, or to replace coagulation factors in patients with abnormal coagulation tests. It can be used for patients with:

·        Disseminated intravascular coagulation (DIC)

·        Bleeding associated with acute blood loss

·        Bleeding in patients with decompensated liver disease

·        Warfarin overdose with life-threatening bleeding

·         

·        Surgery

FFP is used for patients with abnormal coagulation tests who are undergoing a planned surgery or invasive procedure.

 

·        Plasma exchange

FFP is used for plasma exchange in patients with thrombotic thrombocytopenic purpura (TTP) or hyperviscosity syndrome.

 

·        Factor deficiency

FFP is used to replace coagulation factors in patients with congenital or acquired factor deficiency.

 

·        Trauma

FFP is used for trauma patients requiring massive transfusion.

 

Fresh frozen plasma (FFP) is NOT recommended in the following situations: 

 

·        When there are more effective treatments

FFP is not recommended when there are more effective treatments for the condition, such as vitamin K, cryoprecipitate, or factor VIII. 

 

·        When blood volume can be replaced

FFP should not be used as a volume expander unless there is active bleeding and coagulation deficiencies.

 

·        To reverse anticoagulation

FFP should not be used to reverse anticoagulation caused by heparin, direct thrombin inhibitors, or direct factor Xa inhibitors.

 

·        For disseminated intravascular coagulation

FFP is not recommended for disseminated intravascular coagulation without bleeding.

 

·        For vitamin K deficiency

FFP should not be used to reverse vitamin K deficiency for neonates or patients in intensive care units. 

 

·        For patients with normal clotting

FFP should not be used for patients who are bleeding due to a surgical cause and who have normal clotting. 

 

·        As a circulating volume replacement

FFP should never be used as circulating volume replacement. 

 

 

Cryoprecipitate is recommended for patients who have low levels of clotting proteins, especially fibrinogen, or who are bleeding or have a risk of bleeding:

 

·        Bleeding

Cryoprecipitate can be used to prevent or control bleeding in patients whose blood doesn't clot properly.

 

·        Invasive procedures

Cryoprecipitate can be used before an invasive procedure in patients with significant hypofibrinogenemia.

 

·        Massive transfusions

Cryoprecipitate is often used when a patient needs a large number of blood components at once. 

 

·        Fibrinogen deficiency

Cryoprecipitate can be used to treat acquired fibrinogen deficiency or dysfibrinogenaemia.

 

·        Disseminated intravascular coagulation (DIC)

Cryoprecipitate can be used to treat DIC.

 

 

Cryoprecipitate is NOT recommended for the following conditions: 

 

·        Hemophilia A

Cryoprecipitate should not be used to treat Hemophilia A unless other factor VIII preparations are not available.

 

·        Von Willebrand disease

Cryoprecipitate should not be used to treat von Willebrand disease unless the patient does not respond to DDAVP. 

 

·        Factor XIII deficiency

Cryoprecipitate is not usually given for Factor XIII deficiency because virus-inactivated concentrates of this protein are available.

 

·        Congenital afibrinogenemia or dysfibrinogenemia

Cryoprecipitate should not be used to treat these conditions.

 

·        Factor deficiencies

Cryoprecipitate should not be used to treat factor deficiencies when specific factor concentrates are available