Zero contrast optical coherence tomography-guided percutaneous coronary intervention in patients with non-ST segment elevation myocardial infarction and chronic kidney disease.

Objectives: To investigate a strategy for ultra-low volume contrast percutaneous coronary intervention (PCI) with the aims of preserving renal function and observing the 90-day clinical endpoint in patients with non-ST-elevated myocardial infarction (non-STEMI) and chronic kidney disease (CKD).

Background: The feasibility, safety, and clinical utility of PCI with ultra-low radio-contrast medium in patients with non-STEMI and CKD are unknown.

Methods: A total of 29 patients with non-STEMI and CKD (estimated glomerular filtration rate [eGFR] of ≤60 ml/min/1.

[Effects of extracellular calcium concentration on platelets aggregation, coagulation indices and thromboelastography].

Objective: To detect the effect of extracellular Ca2+ concentrations on test results of coagulation-related parameters.

Methods: Blood samples of outpatient medical volunteers were collected and then different doses of calcium chloride added. The rate of platelet aggregation (n = 42), prothrombin time (PT), thrombin time (TT) and activated partial thromboplastin time (APTT) (n = 21) and parameters of thromboelastography (n = 30) were detected according to the standard protocols by plasma turbidimetry, coagulation and recalcification respectively.