Objective: We aimed to evaluate the safety and efficacy of intra-articular (IA) magnesium (Mg) for postoperative pain relief after arthroscopic knee surgery.
Methods. We searched PubMed, Embase, Medline, Cochrane library, and Web of Science to identify randomized controlled trials that compared postoperative pain outcomes with or without IA Mg after knee arthroscopy. The primary outcomes were pain intensity at rest and with movement at different postoperative time points and cumulative opioid consumption within 24 hours after surgery. Secondary outcomes included the time to first analgesic request and side effects.
Results. In total, 11 studies involving 677 participants met the eligibility criteria. Pain scores at rest and with movement 2, 4, 12, and 24 h after surgery were significantly lower, doses of supplementary opioid consumption were smaller, and the time to first analgesic requirement was longer in the IA Mg group compared with the control group. No significant difference was detected regarding adverse reactions between the groups.
Conclusions. Intra-articular magnesium is an effective and safe coadjuvant treatment for relieving postoperative pain intensity after arthroscopic knee surgery.
Protocol registration at Prospero: CRD42020156403.

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Posted 26 Jan, 2021
On 23 Jan, 2021
On 19 Jan, 2021
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On 19 Jan, 2021
Posted 17 Jan, 2021
Received 17 Jan, 2021
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Received 15 Jan, 2021
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On 12 Jan, 2021
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On 03 Dec, 2020
On 02 Dec, 2020
Received 02 Dec, 2020
Received 02 Dec, 2020
Received 02 Dec, 2020
On 29 Nov, 2020
Invitations sent on 28 Nov, 2020
On 28 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
Posted 26 Jan, 2021
On 23 Jan, 2021
On 19 Jan, 2021
On 19 Jan, 2021
On 19 Jan, 2021
Posted 17 Jan, 2021
Received 17 Jan, 2021
On 17 Jan, 2021
On 15 Jan, 2021
Received 15 Jan, 2021
On 13 Jan, 2021
Received 13 Jan, 2021
Invitations sent on 12 Jan, 2021
On 12 Jan, 2021
On 01 Jan, 2021
On 01 Jan, 2021
On 01 Jan, 2021
On 03 Dec, 2020
On 02 Dec, 2020
Received 02 Dec, 2020
Received 02 Dec, 2020
Received 02 Dec, 2020
On 29 Nov, 2020
Invitations sent on 28 Nov, 2020
On 28 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
On 18 Nov, 2020
Objective: We aimed to evaluate the safety and efficacy of intra-articular (IA) magnesium (Mg) for postoperative pain relief after arthroscopic knee surgery.
Methods. We searched PubMed, Embase, Medline, Cochrane library, and Web of Science to identify randomized controlled trials that compared postoperative pain outcomes with or without IA Mg after knee arthroscopy. The primary outcomes were pain intensity at rest and with movement at different postoperative time points and cumulative opioid consumption within 24 hours after surgery. Secondary outcomes included the time to first analgesic request and side effects.
Results. In total, 11 studies involving 677 participants met the eligibility criteria. Pain scores at rest and with movement 2, 4, 12, and 24 h after surgery were significantly lower, doses of supplementary opioid consumption were smaller, and the time to first analgesic requirement was longer in the IA Mg group compared with the control group. No significant difference was detected regarding adverse reactions between the groups.
Conclusions. Intra-articular magnesium is an effective and safe coadjuvant treatment for relieving postoperative pain intensity after arthroscopic knee surgery.
Protocol registration at Prospero: CRD42020156403.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6
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