Purpose: To determine the comparative effectiveness of consistent cooling using an icing device (DonJoy Iceman, DJO Canada, Mississauga, ON) versus intermittent cooling using an ice bag (usual care) for the first 48 hours after total knee arthroplasty (TKA). Method: A sample of 78 patients (intervention group, n ¼ 37; control group, n ¼ 34) undergoing primary TKA were randomized to intervention (device) or control (ice) groups. The primary outcome was pain intensity, measured by numerical pain rating scale (NPRS). Secondary outcomes were passive range of motion (PROM), nausea or vomiting, opioid use, blood loss, lower limb function, hospital length of stay, and patient-reported compliance and satisfaction. Results: No significant differences in the primary outcome (pain intensity measured via NPRS) were observed between control and intervention groups. Patients in the intervention group were significantly more satisfied (8.4 vs. 6.0, p ¼ 0.002); used the device more consistently, day and night (85.7% vs. 29.6% and 87.6% vs. 30.8%, respectively, p < 0.001); and were more likely to recommend this method of cooling (96.8% vs. 68.0%, p ¼ 0.004). Conclusion: The study found no additional benefit of consistent cryotherapy using the icing device over intermittent ice bags on postoperative pain, PROM, nausea or vomiting, opioid use, blood loss, lower limb function, or length of stay, despite significant differences in patient-reported compliance and satisfaction.Key Words: arthroplasty; cryotherapy; knee. RÉ SUMÉObjet: Dé terminer l'efficacité comparative du refroidissement constant au moyen d'un dispositif de refroidissement (DonJoy Iceman, DJO Canada, Mississauga, Ontario) en comparaison du refroidissement intermittent dé coulant de l'utilisation d'un sac à glace (soins habituels) dans les 48 premiè res heures suivant l'arthroplastie totale du genou. Mé thode: Un é chantillon de 78 patients (groupe d'intervention n ¼ 37; groupe té moin n ¼ 34) ayant subi une premiè re arthroplastie totale du genou ont é té randomisé s dans des groupes d'intervention (dispositif) ou té moin (glace). Le ré sultat principal é tait l'intensité de la douleur, mesuré e selon une é chelle d'é valuation numé rique de la douleur. Les ré sultats secondaires é taient l'amplitude passive du mouvement, les nausé es/vomissements, l'utilisation d'opioïde, la perte de sang, la fonction des membres infé rieurs, la duré e du sé jour à l'hô pital, et la conformité et la satisfaction dé claré es par les patients. Ré sultats: On n'a observé aucune diffé rence significative dans le ré sultat principal (intensité de la douleur mesuré e selon une é chelle d'é valuation numé rique de la douleur) entre les groupes té moin et d'intervention. Les patients du groupe d'intervention é taient consid-é rablement plus satisfaits (8,4 contre 6, 0, p ¼ 0,002); utilisaient le dispositif de fac¸on plus uniforme, le jour et la nuit (85.7% contre 29.6% et 87.6% contre 30.8%, respectivement, p < 0,001); et é taient plus susceptibles de recommander cette mé thode de r...
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