Author(s): ,
Miščuks, A.*
Hospital of Traumatology and Orthopaedics, Department of Anesthesiology and Intensive Care, Rīga, Latvia
Golubovska, I.
Hospital of Traumatology and Orthopaedics, Department of Anesthesiology and Intensive Care, Rīga, Latvia
Januškeviča, V.
University of Latvia, Faculty of Medicine, Rīga, Latvia
Zadorožnijs, S.
Hospital of Traumatology and Orthopaedics, Department of Traumatology and Orthopaedics, Rīga, Latvia
ESRA Academy. Miscuks A. Sep 13, 2017; 190979; 328 Topic: MISCELLANEOUS
Aleksejs Miscuks
Aleksejs Miscuks

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Background and Aims:

Total knee replacement is associated with moderate to severe postoperative pain.Femoral nerve block and adductor canal block are used as a component of multimodal analgesia.Thermography is a technique whereby temperature can be accurately measured over a skin surface at a specific time.It is not  known whether the extent of the temperature change can be used to predict block success and to evaluate postoperative pain.
Evaluate skin temperature changes in operative knee after femoral nerve blockade and adductor canal block, and evaluate whether these changes in temperature correlates with a sufficient level of analgesia.


Patients undergoing TKR under spinal anesthesia were randomized into the one of two groups.Patients of the first group received 0,375% Ropivacaine in continuous femoral nerve block catheter, second group-in adductor canal catheter as a component of multimodal post-operative analgesia.Post-operative rest pain intensity was measured 6-8 hours after surgery before femoral or adductor infusion and 30 minutes after procedur with NRS.Temperature in the operative knee was measured with Flir termal camera before analgesic administration and every 5 minutes in 30 minutes time interval.


Two groups were compared:15 patients in AKB group and 10 patients in FNB group.Mean rank of NRS scale in AKB group before medications administration 6.6,30 minutes later 2.6,in FNB group-before 6.8,30min after medications administration 4.1.The mean temperature’s difference between the outlet temperature and every fifth minute temperature at 30 minute period in AKB patients group:1.33ºC;in FNB group:1.53ºC.


Study do not show correlation between pain intensity changes and temperature changes.

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