Andreas Voss1, Mary Beth McCarthy2, Hardeep Singh2, Knut Beitzel3, Jessica DiVenere2, Mark P Cote2, Alexander R Hoberman2, Michael Nowak2, Andreas B Imhoff3, Augustus D Mazzocca4. 1. Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A.; Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany. 2. Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A. 3. Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany. 4. Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A.. Electronic address: mazzocca@uchc.edu.
Abstract
PURPOSE: To evaluate the number of connective tissue progenitor cells (CTPs) and nucleated cells obtained during bone marrow aspiration (BMA) from the proximal humerus using either a fenestrated or a nonfenestrated trocar and determine differences in varying amounts of aspiration volume. The first hypothesis was that the number of CTPs extracted with the fenestrated trocar would be greater due to its potential to extract more cells through its fenestrations. The second hypothesis was that using consecutive aspirations with either trocar would provide a consistent number of CTPs and nucleated cells throughout the aspiration with no significant decrease of cells at the end. METHODS: Patients were eligible for inclusion if they underwent primary or revision arthroscopic rotator cuff surgery, were between 18 and 75 years of age, and signed the informed consent. Between January 2011 and September 2013, 24 patients underwent BMA from the proximal humerus during arthroscopic surgery. They were grouped according to which of 3 different trocars were used for aspiration: (1) nonfenestrated, (2) fenestrated trocar A, and (3) fenestrated trocar H. Four consecutive 12 mL double syringes were used for each aspiration: 1 (0-12 mL), 2 (12-24 mL), 3 (24-36 mL), and 4 (36-48 mL). One milliliter was removed from each syringe (nonconcentrated BMA). The remainder of the BMA was then spun using a centrifuge. BMA and concentrated BMA were brought to the laboratory, counted for nucleated cells (million cells/mL BMA) and cultured for 7 days to obtain colony-forming units (CTPs/million cells). RESULTS: No significant differences were observed in tubes 1 to 4 in the number of nucleated cells in the nonconcentrated and concentrated BMA using the nonfenestrated trocar compared with the fenestrated trocars A and H (all P > .05), except for concentrated BMA tube 3 (P = .014) and tube 4 (P = .003). Nonconcentrated and concentrated BMA from tubes 1 to 4 had a significantly higher CTP prevalence using the nonfenestrated trocar compared with the fenestrated trocars A and H (all P < .05). Most of the times the first tube of each aspiration showed a significantly greater amount of cells and a greater CTP prevalence compared with tubes 2, 3, and 4. CONCLUSIONS: Aspiration from the proximal humerus with the nonfenestrated trocar during BMA was associated with higher prevalence of CTPs, suggesting that more CTPs can be obtained using a nonfenestrated trocar. Furthermore, CTPs can be obtained through all consecutive aspirations with a greater amount in the first tubes. LEVEL OF EVIDENCE: Level II, prospective comparative study.
PURPOSE: To evaluate the number of connective tissue progenitor cells (CTPs) and nucleated cells obtained during bone marrow aspiration (BMA) from the proximal humerus using either a fenestrated or a nonfenestrated trocar and determine differences in varying amounts of aspiration volume. The first hypothesis was that the number of CTPs extracted with the fenestrated trocar would be greater due to its potential to extract more cells through its fenestrations. The second hypothesis was that using consecutive aspirations with either trocar would provide a consistent number of CTPs and nucleated cells throughout the aspiration with no significant decrease of cells at the end. METHODS:Patients were eligible for inclusion if they underwent primary or revision arthroscopic rotator cuff surgery, were between 18 and 75 years of age, and signed the informed consent. Between January 2011 and September 2013, 24 patients underwent BMA from the proximal humerus during arthroscopic surgery. They were grouped according to which of 3 different trocars were used for aspiration: (1) nonfenestrated, (2) fenestrated trocar A, and (3) fenestrated trocar H. Four consecutive 12 mL double syringes were used for each aspiration: 1 (0-12 mL), 2 (12-24 mL), 3 (24-36 mL), and 4 (36-48 mL). One milliliter was removed from each syringe (nonconcentrated BMA). The remainder of the BMA was then spun using a centrifuge. BMA and concentrated BMA were brought to the laboratory, counted for nucleated cells (million cells/mL BMA) and cultured for 7 days to obtain colony-forming units (CTPs/million cells). RESULTS: No significant differences were observed in tubes 1 to 4 in the number of nucleated cells in the nonconcentrated and concentrated BMA using the nonfenestrated trocar compared with the fenestrated trocars A and H (all P > .05), except for concentrated BMA tube 3 (P = .014) and tube 4 (P = .003). Nonconcentrated and concentrated BMA from tubes 1 to 4 had a significantly higher CTP prevalence using the nonfenestrated trocar compared with the fenestrated trocars A and H (all P < .05). Most of the times the first tube of each aspiration showed a significantly greater amount of cells and a greater CTP prevalence compared with tubes 2, 3, and 4. CONCLUSIONS: Aspiration from the proximal humerus with the nonfenestrated trocar during BMA was associated with higher prevalence of CTPs, suggesting that more CTPs can be obtained using a nonfenestrated trocar. Furthermore, CTPs can be obtained through all consecutive aspirations with a greater amount in the first tubes. LEVEL OF EVIDENCE: Level II, prospective comparative study.
Authors: Lukas N Muench; Cameron Kia; Alexander Otto; Julian Mehl; Joshua B Baldino; Mark P Cote; Mary Beth McCarthy; Knut Beitzel; Augustus D Mazzocca Journal: BMC Musculoskelet Disord Date: 2019-11-14 Impact factor: 2.362
Authors: Arthur Landry; Benjamin J Levy; Mary Beth McCarthy; Lukas N Muench; Colin Uyeki; Daniel P Berthold; Mark P Cote; Augustus D Mazzocca Journal: Arthrosc Sports Med Rehabil Date: 2020-09-14
Authors: Lukas N Muench; Cameron Kia; Daniel P Berthold; Colin Uyeki; Alexander Otto; Mark P Cote; Mary Beth McCarthy; Knut Beitzel; Robert A Arciero; Augustus D Mazzocca Journal: Arthrosc Sports Med Rehabil Date: 2020-10-05
Authors: Andreas Voss; Mary Beth McCarthy; Nicholas Bellas; Ralf Kellner; Knut Beitzel; Felix Dyrna; Andreas B Imhoff; Augustus D Mazzocca; Lukas N Muench; Daniel P Berthold Journal: Arthrosc Sports Med Rehabil Date: 2021-10-30