Comparison of Pre- and Postoperative Hemoglobin and Hematocrit Levels in Hip Arthroscopy

Roberto Seijas*, 1, 2, Wenceslao Espinosa 1, Andrea Sallent 3, Xavier Cuscó 1, Ramón Cugat 1, Oscar Ares 1, 2, 4
1 Fundación García-Cugat. Artroscopia GC, Hospital Quirón, Barcelona, Spain
2 Department of Anatomy, Universitat Internacional de Catalunya, Spain
3 Orthopedic Department, Hospital Vall d’Hebron, Barcelona, Spain
4 Orthopedic Department, Hospital Clínic, Barcelona, Spain

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Creative Commons License
© Seijas et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Orthopedic and Trauma Surgery, Fundación García Cugat, Hospital Quiron, Pza. Alfonso Comín 5-7 Planta -1, 08035 Barcelona, Spain; Tel: +34 934152307; Fax: +34 934152307; E-mail:


Purpose :

to assess the loss in hematocrit and hemoglobin, if any, 24 hours after hip arthroscopy.

Methods :

thirty-five patients were included. Laboratory tests including complete blood count and white blood cells were performed one week prior to surgery and 24 hours after. Surgical time, volume of saline perfusion and pump perfusion was also recorded.

Results :

mean preoperative hematocrit was 42.01% (4.63 SD), whereas mean postoperative hematocrit at 24 h decreased to 36.78% (SD 5.11) (p <0.021.). Mean preoperative hemoglobin was 14.23 g/dL (1.73 SD), and mean postoperative hemoglobin at 24 h decreased to 12.40 g/dL (SD 1.92) (p =0.03.). Platelets and white blood cells, as well as the remaining biochemical parameters showed no significant difference between preoperative and postoperative samples. Lost blood volume worked out with the logarithmic method for estimated blood loss was which 0.78 liters (SD 0.45). Lost blood volume taking into account, the red blood cell mass was also 0.78 liters (SD 0.45).

Conclusion :

a significant decrease in hemoglobin and hematocrit after hip arthroscopy was observed. Although patients did not show clinical signs of anemia or bleeding, blood loss should be considered when planning a hip arthroscopy, especially in patients at risk of anemia. According to our results, we recommend a postoperative control analysis at 24 h.

Level of Evidence :

level II, Diagnostic Study.

Keywords: Bleeding, blood sample, hematocrit, hemoglobin, hip arthroscopy, surgical bleeding.