Intraoperative dexamethasone alters immune cell populations in patients undergoing elective laparoscopic
T Corcoran1,2,3,4, M Paech1,2,3,5, D Law5
1Department of Anaesthesia and Pain Medicine, Royal Perth Hospital, Perth, Western Australia.
Insights
A single intraoperative dose of dexamethasone attenuated inflammation and altered immune cell counts 24 hours after laparoscopic surgery in women. These effects on immune response were not observed at later time points.
Area of Science:
- Immunology
- Pharmacology
- Surgical Anesthesia
Background:
- Dexamethasone is primarily used by anaesthetists for its anti-emetic properties.
- The study investigated the impact of a single intraoperative dexamethasone dose on immune system components during laparoscopic surgery.
Purpose of the Study:
- To characterize the effects of intraoperative dexamethasone on cellular and metabolic immune components.
- To assess changes in inflammatory markers and immune cell counts post-laparoscopic surgery.
Main Methods:
- Prospective, double-blind, randomized trial involving 32 female patients undergoing elective laparoscopic surgery.
- Patients received either saline (control) or 4 mg dexamethasone intravenously post-anesthesia induction.
- Immune cell counts and inflammatory markers were measured at 24 hours, 48 hours, and 6 weeks post-surgery.
Main Results:
- Dexamethasone attenuated the increase in C-reactive protein at 24 hours post-surgery compared to the control group.
- Significant alterations in white blood cell counts, including lymphocyte subsets, were observed at 24 hours, with dexamethasone mitigating most changes.
- No significant differences in glucose, interleukin-6, or immune cell counts were found between groups at 48 hours or 6 weeks.
Conclusions:
- Dexamethasone administration during laparoscopic surgery appears to temporarily attenuate inflammation and modulate immune cell counts in female patients.
- The observed immune system changes were transient, with no significant effects noted beyond 24 hours post-surgery.
- The clinical significance of these short-term immune alterations on postoperative immune function remains undetermined.
Background:
Anaesthetists use dexamethasone principally for its anti-emetic effect. The purpose of this study was to characterize the effects of a single intraoperative dose of dexamethasone on cellular and metabolic components of the immune system in patients undergoing laparoscopic surgical procedures.
Methods:
In this prospective double-blind trial, female patients undergoing elective major laparoscopic surgery were randomized to receive saline (Control group, n =16) or dexamethasone 4 mg (Dexamethasone group, n =16) i.v. after the induction of anaesthesia. Inflammatory markers and immune cell counts were examined at 24 and 48 h and 6 weeks after surgery. The changes from baseline preoperative values were compared between groups using a Mann-Whitney U -test, and linear mixed models were used to validate the findings.
Results:
No differences in concentrations of serum glucose and interleukin-6 were observed between groups after surgery. The increase in C-reactive protein concentration at 24 h after surgery was greater in the control group [median (interquartile range), 33 (25-65) vs 17 (7-26) mg dl -1 ; P =0.018]. Extensive changes in the counts of white cells, including most lymphocyte subsets, were observed 24 h after surgery, and dexamethasone appeared to attenuate most of these changes. Changes at 48 h and 6 weeks did not differ between groups.
Conclusions:
In female patients undergoing elective laparoscopic gynaecological surgery, dexamethasone administration appears to attenuate inflammation and to alter immune cell counts at 24 h, with no effects identified after this time. The importance of these changes for postoperative immune function is unknown.
Trial Registration:
Australia and New Zealand Clinical Trials Registry (ACTRN12608000340336).
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