Please select the eligibility criteria that correspond to the clinical trial below.
Title: Comparison of Conventional and Ultrasound Guided Techniques of Radial Artery Cannulation in Different Hemodynamic Subsets: a Randomized Controlled Study
Brief Summary: Purpose Two techniques of radial artery cannulation, ultrasound guided (USG) and conventional method (CM) were compared to find the better technique in general and in different hemodynamic subsets of patients.

Method This is a prospective randomized, single center study of 100 patients. The details of the primary cannulation technique, number of attempts, time taken, failure and cross-over technique were recorded for three different hemodynamic subsets with Systolic blood pressure \<80 mm hg, 80-100 mm hg and \> 100 mm hg.


Options:
A: Inclusion Criteria:

* All adult Patients worthy of radial artery cannulation, who consented

Exclusion Criteria:

* No consent
B: Inclusion Criteria:

* Adult patients presenting for cardiac or peripheral catheterization with planned radial approach.
* Barbeau's or Allen's test indicating at least some degree of collateral circulation in palmar vessels
* Functional ultrasound equipment with ultrasound trained attending operator

Exclusion Criteria:

* Inability to provide informed consent
* Femoral access
* Emergency procedure (Shock, STEMI)
* End-stage renal disease on hemodialysis
* Previous ipsilateral puncture within 1 week
C: Inclusion Criteria:

1. Age ≥ 18 years.
2. The distal and proximal radial artery must be palpable and non-occlusive flow must be confirmed by (Doppler) ultrasound.
3. Patient should be able to comply with the protocol.
4. Provide written informed consent before study participation

Exclusion Criteria:

1. Obligatory femoral or forearm radial access
2. Previous ipsilateral forearm radial artery occlusion.
3. Patient on therapeutic oral anticoagulation.
4. Very large hand/wrist anatomy that will preclude using the available hemostatic radial bands.
5. Enrolment in another study that competes or interferes with this study.
6. Poor clinical condition like cardiogenic shock, which prohibits pre- and post-procedural function tests.
7. Subject with planned complex PCI or procedure necessitating multiple intervention.
8. Any other condition or co-morbidity which, in the opinion of the investigator or operator, may pose a significant hazard to the subject if he or she is enrolled in the study.
9. History of stroke with residual deficit that affects hand function.
10. Previous radial artery catheterization within 1 year.
D: Inclusion Criteria:

* Age 18 years and older
* Undergoing diagnostic angiography for ischemic symptoms with possible PCI, or undergoing planned urgent or elective PCI
* Has provided informed consent and agrees to participate
* Patients must be equally eligible to undergo cardiac catheterization via radial or femoral access

Exclusion Criteria:

* Primary PCI for STEMI
* Planned right heart catheterization
* Valvular heart disease requiring valve surgery within 30 days after the index procedure
* Hemodialysis access (arteriovenous fistula or graft) in the arm to be used for PCI in case of assignment to radial approach (the opposite arm may be used for radial access if a dialysis graft is present in one)
* Peripheral arterial disease prohibiting vascular access
* Presence of bilateral internal mammary artery coronary bypass grafts
* International normalized ratio ≥1.5 while treated with oral vitamin K antagonists (i.e. warfarin) Receipt of oral factor Xa or IIa inhibitors ≤24 h before procedure
* Planned staged PCI within 30 days after index procedure.
* Any planned surgeries within 30 days after index procedure
* Planned dual arterial access (for example for chronic total occlusion PCI)
* Coexisting conditions that limit life expectancy to less than 30 days
* Positive pregnancy test

Answer: A