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Two pts (one male, one female) had similar reactions to durolane viscosupplementation injection that were unexpected and uncommon.Patient #1 received 60 mg sodium hyaluronate injection in right knee on (b)(6) 2021.Patient returned to clinic on (b)(6) reporting worsening pain since injection.Patient #2 received 60 mg sodium hyaluronate injection in each knee also on (b)(6).Patient returned to clinic on (b)(6) with 0 minutes of relief since last injection and no improvement in symptoms.Appears medications were from the same lot.Suspect possible device malfunction due to unexpected absence of relief from symptoms for all three injections from same lot.
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