Assessment of Osteoimmunological Changes Following Orthognathic Surgery

BACKGROUND

There is a scarcity in the published literature which evaluates the postoperative inflammatory response and patients' immunity following orthognathic surgery.

AIM

The present prospective study aimed to evaluate the changes in two immunological callipers to measure the traumatic effect of orthognathic surgery.

METHODS

In the present prospective cohort study, we included women (age range 16-30 years) with severe dentofacial deformities who were scheduled for bimaxillary osteotomy. Blood samples were collected for measurement of transforming growth factor beta one (TGF-β1) and osteoprotegrin (OPG) levels. The statistical analysis was carried with SPSS software.

RESULTS

In the present study, nine patients with severe dentofacial deformity were operated successfully under general anaesthesia. All patients reported decreased energy and fatigue in the early days after surgery and had difficulties with nutrition due to pain, oedema and paresthesia; however, no massive weight loss was reported. The levels of OPG started to increase immediately postoperatively (mean = 0.46 ± 0.08; p = 0.001). A significant increase in the concentration of OPG begun postoperatively and continued to rise significantly until the six weeks to reach 2.24 ± 0.30 ng/mL (p < 0.001). Similarly, the concentration of TGF-β1 increased at three days postoperatively and continued to rise until the six weeks to reach 1.28 ± 0.19 ng/mL (p <0 .001).

CONCLUSION

In conclusion, orthognathic surgery is associated with a significant rise in the pro-inflammatory cytokines until the six weeks postoperatively. These observed results may indicate a significant alteration in the immunity of the patients to undergoing orthognathic surgery.

Prevalence of the systemic inflammatory response syndrome in patients who underwent orthognathic surgery

PURPOSE

The systemic inflammatory response syndrome (SIRS) is the body's response to an insult, such as infection, trauma, burn, and surgical stress linked to several factors deemed potential for multiple organ failure if left untreated. Thus, the aim of this paper was a prospective study to examine the incidence of SIRS in postoperative patients who underwent orthognathic surgery from June/2013 to July/2016.

METHODS

The sample consisted of 80 patients who underwent bimaxillary orthognathic surgery, with data on vital signs and white blood cell count collected preoperatively, and the same data collected in the immediate postoperative period, in addition to CO₂ pressure in arterial blood by blood gas analysis. The data were tabulated and cases of SIRS (2 or more signs out of four pre-set signs) were identified within 24 h after surgery.

RESULTS

From the sample of 80 patients, 26 (32.5% of total) patients had SIRS with higher incidence in females who are 40 years old.

CONCLUSION

The incidence of patients who develop SIRS after orthognathic surgery is relatively high and we should pay attention to the possible complications that these cases can evolve.

Hyperglycaemia, inflammation, RAS activation: three culprits to blame for acute kidney injury emerging in healthy rats during general anaesthesia

AIM

Major surgery under general anaesthesia might evoke acute kidney injury (AKI), sometimes culminating in end stage renal disease. We investigated the roles of hyperglycaemia, inflammation and renin-angiotensin system (RAS) activation in induction of AKI following anaesthesia by different anaesthetic drugs and/or regimens.

METHODS

Ninety-four Sprague-Dawley rats underwent 1 h-anaesthesia by various protocols, including repeated blood glucose and insulin measurements. Blood samples and kidneys were allocated at sacrifice, for evaluation of renal function, inflammatory status and Angiotensin-II availability.

RESULTS

Hyperglycaemia emerged in unconscious rats irrespective of anaesthetic drug choice or anaesthesia regimen. Insulin increase correlated with hyperglycaemia levels. Levels of Cystatin-C, as well as serum and urine neutrophil gelatinase-associated lipocain (NGAL), were significantly augmented. Serum transforming growth factor beta (TGF-β) and interleukins (IL)-1β, -4, -6, and -10 were significantly increased. Intra-renal Angiotensin-II, TGF-β, IL-6 and-10 were significantly increased. IL-1 was decreased. IL-4 remained unaltered.

CONCLUSIONS

Acute hyperglycaemia, systemic and intra-renal inflammation and RAS activation were independently triggered by induction of anaesthesia. Each confounder aggravated the impacts of the others, bringing about concomitant deterioration of renal function. Increased insulin secretion attenuated but did not abolish hyperglycaemia. Systemic inflammation was counterforced by anti-inflammatory cytokines, whereas intra-renal inflammation persisted, so that AKI progressed unopposed.

Upregulation of TLR2/4 expression in mononuclear cells in postoperative systemic inflammatory response syndrome after liver transplantation

BACKGROUND

To explore the relationship between Toll-like rpheral blood mononuclear cells (PBMC) and systemic inflammatory response syndrome (SIRS) in postoperative patients of liver transplantation (LT).

METHODS

Blood samples of 27 patients receiving LT were collected at T1 (after induction of anaesthesia), T2 (25 minutes after the beginning of anhepatic phase), T3 (3 hours after graft reperfusion), and T4 (24 hours after graft reperfusion). The expression of TLR2/4 on PBMC and serum concentration of tumor necrosis factor (TNF)-alpha, interleukin (IL)-1beta, and IL-8 were measured. The patients were divided into SIRS group (n = 12) and non-SIRS group (n = 15) for analysis.

RESULTS

Blood loss and transfusion were higher in the SIRS group than in the non-SIRS group. Both the preanhepatic and anhepatic phase were significantly longer in the SIRS group. The TLR2/4 expression on PBMC as well as serum TNF-alpha, IL-1beta, and IL-8 were significantly higher at T3 and T4 than that at T1 and T2 in the SIRS patients. The expression of TLR4 on PBMC is positively correlated to serum TNF-alpha, IL-8. Expression of TLR2/4 on PBMC and serum concentrations of TNF-alpha, IL-1beta, did not differ among the 4-time points in non-SIRS patients.

CONCLUSIONS

Upregulation of TLR2/4 expression on PBMC may contribute to the development of postoperative SIRS during perioperative period of LT.