Table 2.

Surgical Pearls and Pitfalls of Arthroscopic Intercondylar Notch Bone Marrow Aspiration During Anterior Cruciate Ligament Reconstruction

Pitfalls	Pearls
I.Bone marrow sample coagulates easily.	IA.Add a heparinized solution to the needle used for aspiration. IB.Discard the first milliliter of aspirated bone marrow.
II.Bone marrow sample may usually be less than 60 mL.	IIA.Add autologous blood to the bone marrow sample for adequate preparation of leukocyte and platelet concentrate.
III.May be difficult to achieve the correct angle to insert the trocar at the femoral notch apex.	IIIA.Insert the trocar through the anteromedial portal. IIIB.The femoral notch apex is 5 mL to the lateral edge of the PCL insertion.
IV.After introducing the trocar, it is possible not to obtain a bone marrow sample when aspirating.	IVA.Introduce the trocar at approximately 30 mL of depth, turning it clockwise. IVB.Turn the trocar 90° clockwise every 2 mL of bone marrow.

PCL, posterior cruciate ligament.