Role of Postoperative Intravenous Administration of Dexamethasone on Outcomes of Tonsillectomy Procedure: as Comparative Prospective Audit

Research Article | DOI: https://doi.org/10.31579/2692-9562/091

Role of Postoperative Intravenous Administration of Dexamethasone on Outcomes of Tonsillectomy Procedure: as Comparative Prospective Audit

  • Khalid Mohamed Bofares *

Professor of Otorhinolaryngology, Omar Almoukhtar University, ELbyda, Libya.

*Corresponding Author: Khalid Mohamed Bofares, Professor of Otorhinolaryngology, Omar Almoukhtar University, ELbyda, Libya.

Citation: Khalid Mohamed Bofares (2023), Role of Postoperative Intravenous Administration of Dexamethasone on Outcomes of Tonsillectomy Procedure: as Comparative Prospective Audit, J Clinical Otorhinolaryngology, 5(5); DOI:10.31579/2692-9562/091

Copyright: © 2023, Khalid Mohamed Bofares. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Received: 28 April 2023 | Accepted: 19 June 2023 | Published: 28 June 2023

Keywords: post- tonsillectomy dexamethasone administration; post-tonsillectomy antinociception; post-tonsillectomy analgesia; post- tonsillectomy complications

Abstract

Back ground and aims:     

Tonsillectomy is considered as the most common surgical procedure in specialty of otorhinolaryngology. Therefore, there are frequent thoughts regarding this procedure to improve its conditions from different aspects, indications, time of surgery, techniques, safety measures, and postoperative care. One of big issues regarding this procedure is the post-operative sequel and complications namely post-operative pain, hemorrhage, nausea and vomiting, dehydration, metabolic as well as nutritional deficiencies, and air way obstruction. Therefore, this study was conducted prospectively to confirm the effect of intravenous administration of dexamethasone on outcomes of this procedure as compared to the effect of rectal administration of indomethacin as well as oral administration of paracetamol after tonsillectomy in children.

Patients and methods: 

One-thousand, five-hundred, sixty-four (1564) cases of patients aged from 8 months to 85 years presented at ENT department- ALTAWRA central teaching hospital, and ALTRAHOM private clinic – ELByeda – Libya as well as ALNGAH private clinic –DARNA- Libya, at period from September 2005 to September 2022. The patients presented as cases of chronic tonsillitis (with or without adenoid enlargement among childhood patients), with different varieties of surgical indications for tonsillectomy. These indications were snoring and apnea attacks, persistent secretory otitis media, frequent attacks of acute suppurative otitis media, failure to thrive among children, repetitive attacks of chest infection, mal-occlusive dental deformity, recurrent attacks of acute tonsillitis (according to Paradise's criteria), and unilateral enlarged tonsils with high suspicious of neoplastic changes for tonsillectomy-biopsy. The patients were divided into two groups, group-A including seven-hundred, eighty-two patients, and remaining half of patients was representing the group-B. The patients among group-A were administrated with intravenous dexamethasone, while the other group receiving just paracetamol. As prospective analytic study, two groups compared in relation to significant postoperative complications risk, which were in form of post-tonsillectomy pain, bleeding, nausea and vomiting, respiratory distress, dehydration, post-adeno-tonsillectomy negative pressure pulmonary edema, and metabolic as well as nutritional deficiencies. In addition, these groups compared for any significant difference regarding the period of postoperative hospitalization, which can be used as objective indicator to measure the postoperative morbidity rate.

Results:  

Dexamethasone administration caused significant improvement in pain intensity and thus improving the postoperative oral intake as compared to paracetamol group. From the other view, there was significant reduction in the incidence of post-tonsillectomy upper air way obstruction, nausea and vomiting, dehydration, bleeding, and metabolic as well as nutritional deficiencies among group-A as compared to group-B. 

Conclusion:

Dexamethasone can be considered as potent analgesic drug after tonsillectomy procedure and in same time, it plays significant rule in the improvement of outcomes of this common procedure as compared to the other commonly used non-steroidal anti-inflammatory drugs.

Introduction

Tonsillectomy procedure (with or without adenoidectomy) is the most common surgical procedure in the specialty of otorhinolaryngology[1,2]. Post-operative pain is a significant problem that continues to be untreated in the pediatric population. Post-adenotonsillectomy pain can be in the form of sore throat, odynophagia, otalgia or trismus [1-3,5]. The presence of post- tonsillectomy pain especially in the form of sore throat, or severe odyno­phagia may restrict swallowing and lead to severe dehydration and weight loss [1-3,5]. Thus post-tonsillectomy pain can be considered as the most significant contributing factor for other post- tonsillectomy complications namely bleeding, air way obstruction, dehydration, metabolic as well as nutritional deficiencies therefore by proper control of post-operative pain, the other complications incidence will be reduced [1-4,5]. For this reason there is continuous research for potent anti-nociceptive agent to be used post-operatively after tonsillectomy procedure. Although many studies have been carried out to evaluate the effect of diclofenac sodium as well as paracetamol and indomethacin on post-tonsillectomy pain [1,3,5,7], it was felt at the time of initiating this study that there is a lack of data and information regarding the effectiveness of intravenous administration of dexamethasone after tonsillectomy. The specific aims of the study were (a): To assess the analgesic efficacy of dexamethasone on post-tonsillectomy pain and oral intake. ­(b): To compare the an­algesic efficacy of dexamethasone with that of indomethacin and paracetamol as most common analgesic drugs used after adeno-tonsillectomy. ­(c): To postulate the effect of intravenous administration of dexamethasone on outcomes of tonsillectomy procedure as compared to indomethacin and paracetamol.

Patients and Methods 

One-thousand, five-hundred, sixty-four (1564) cases of patients aged from 8 months to 85 years presented at ENT department- ALTAWRA central teaching hospital, and ALTRAHOM private clinic – ELByeda – Libya as well as ALNGAH private clinic –DARNA- Libya, at period from September 2005 to September 2022. The patients presented as cases of chronic tonsillitis (with or without adenoid enlargement among childhood patients), with different varieties of surgical indications for tonsillectomy. These indications were snoring and apnea attacks, persistent secretory otitis media, frequent attacks of acute suppurative otitis media, failure to thrive among children, repetitive attacks of chest infection, mal-occlusive dental deformity, recurrent attacks of acute tonsillitis (according to Paradise's criteria), and unilateral enlarged tonsils with high suspicious of neoplastic changes for tonsillectomy-biopsy. Patients with renal disease, gastro­intestinal disease, chronic pain states or daily intake of NSAID were excluded. Informed consent was obtained from the patients as well as patients' relatives for participation at the study. All patients were admitted one day prior to surgery after normal routine investigations. The patients were divided into two groups, group-A including seven-hundred, eighty-two patients, and remaining half of patients was representing the group-B. The patients among group-A were administrated with intravenous dexamethasone, while the other group receiving just paracetamol. In accordance, by simple random sampling, each group contains variety of ages from selected age spectrum. Group-A patients were administrated by intravenous dexamethasone (4mg-8mg\ dose) as three doses first dose was administrated intra-operatively. Group-B patients were received oral paracetamol (10-15 mg/kg) in four divided doses first dose after two hours from surgery. Inhalation anesthesia with was used and supplemented with intravenous Fentanyl 200-400mg, and intubation ei­ther performed by oral endotracheal or naso-tracheal tube insertion.

Adenoidectomy was carried out by cu­rette, while tonsillectomy by simple dissection method. Homeostasis was se­cured by Bipolar Electrocautery, ligation or by pack pressure. All patients under­went extubation in the operative room then transferred to the recovery station, vital signs were assessed and after ap­propriate care in recovery room, the patients were transferred to the in- patient ward. During this period, any instances of crying, vomiting or agitation were re­corded. The patients were assessed 6, 12, 18 and 24 hours after surgery to see whether they required pain medication. The pain was assessed subjectively using visual analog scale (VAS) by looking to facial expression of the patient during swallowing process. Time of first oral intake and quantity was re­corded; temperature, nausea and vomit­ing were also recorded. Although there were some cases attained some degree of improvement in pain after administration of analgesic drug, they were considered as having pain, while those who im­proved completely were considered as having no pain. As prospective analytic study, two groups compared in relation to significant postoperative complications risk namely post-tonsillectomy pain, bleeding, nausea and vomiting, respiratory distress evidences, dehydration, post-adeno-tonsillectomy negative pressure pulmonary edema, and metabolic as well as nutritional deficiencies. In addition, these groups compared for any significant difference regarding the period of postoperative hospitalization, which can be used as objective indicator to measure the postoperative morbidity rate.

Data were presented by using descriptive analysis as means ± standard error of mean (s.e.m) and per­centages. Test of significance was measured; using chi-square test and two-way analysis of variance ~.A probability less than 0.05 was consid­ered as significant, the degree of signifi­cance was determined by using level of standard deviation test. Student — t — test was used for dependent sample, as well as contingency coefficient was calculated as measurement of association between studied variables.

Results

As can be illustrated at figure-1, the results presented sig­nificant reduction in post tonsillec­tomy throat pain and otalgia after ad­ministration of dexamethasone in compari­son to paracetamol (P<0>

In fact there was no any significant difference between two groups regarding the occurrence of post-tonsillectomy airway obstruction (P>0.5) i.e. there was no any post- operative air way obstruction cases recorded by this presented study. By same manner, there was no any significant difference between two groups regarding the appearance of post-tonsillectomy metabolic or nutritional deficiencies (P>0.5). In addition, there was no any significant difference between two groups in relation to post-operative hospitalization time, all patients among two groups were discharged from the hospital after 12 hours maximum from time of the surgery performance (P>0.5). 

 

Figure-1: the illustration of the significant difference (P<0>

Figure-2: the illustration of the significant difference (P<0>

Discussion

Adeno-tonsillectomy and tonsillectomy procedures are considered as the most common surgical procedures in the spe­cialty of (ENT). Post-operative pain is a significant problem that continues to be untreated in the pediatric population, which leads to the inability to tolerate oral intake and unplanned hospitaliza­tion  [1,2,3-5].

Prostaglandins contribute to pain and in­flammation after tissue injury and the anti-nociceptive action of Non Steroidal Anti Inflammatory Drugs is attributed usually to the peripheral inhibition of prostaglandin synthesis [1-7].

It has been demonstrated that the admini­stration of diclofenac sodium decreases postoperative pain results in a lower in­cidence of nausea and vomiting, and in­creases oral intake as compared to paracetamol[3,5-7]. In the same study, it has been shown that by the administration of diclofenac sodium still there is risk of post tonsillectomy complications. Whereas among 80 children; there were one child developed reactionary hemor­rhage and one child developed secondary hemorrhage, this is most probably due to platelets dysfunction which may be caused by the administration of di­clofenac sodium [3,5,7,8].

On the other hand; it was found that indomethacin given (1-3mg/kg) in three divided doses after tonsillectomy reduces pain, increases liquid intake in the first 24 hours and re­sulted in earlier discharge from hospital.  Although indomethacin was given earlier with less frequency, but still it is show­ing more potent analgesic effect as com­pared to paracetamol. This can be ex­plained by longer duration of action of indomethacin as compared to paraceta­mol [1]

In addition, it was found that the intra-operative as well as postoperative intravenous administration of dexamethasone would help in the maintenance of airway as patent as much as possible due to the potent anti-inflammatory action of this agent. In same manner the systemic administration of dexamethasone was approved to relief the post-tonsillectomy throat pain thus, it helps in the recovery of normal swallowing mechanism as soon as possible, and due to platelets aggregation stimulating effect of dexamethasone, its systemic administration was found to reduce the risk of post-tonsillectomy hemorrhage [9-14]. The protocol of dexamethasone administration which applied in this presenting study was 4-8 mg administered intravenously at time of anesthesia induction then followed by 4-8 mg administered intravenously every eight hours postoperatively for first 24 hours and after that the child will continue with oral administration of dexamethasone as 1 mg \ kg \ day for 7-14 days accordingly [9-14]

Although there were multiple factors which usually affect severity of pain and tolerance of the patients to pain intensity, one of them is the age factor. The adult patients can tolerate pain more than children. Other factor is the technique for bleeding control, the use of bipolar elec­trocautery and ligation technique create more painful situation as compared to pack pressure technique [2-8]. However, the effects of these factors on the results of the study were overcame by random selection of the patients participated in each group. Moreover, each group was including all age varie­ties in the presenting study. In addition, the ran­dom distribution of patients in each group was made regarding the technique which was used intra-operatively for con­trol of bleeding.

On the other hand, the vomiting tendency can be correlated with the pain intensity, that the pain severity is directly proportionate to the induction of vomiting tendency [4,6-9]. This can be explained by the relationship between the pain and vasovagal attack i.e. the pain is an important inducing factor of vasovagal attack, thus the stimulation of vasovagal attack will in­duce vomiting [4,6-9]. This may explain the significant reduction of vomiting ten­dency after administration of dexamethasone as compared to paracetamol.

Conclusion:     

Dexamethasone can be considered as potent analgesic drug after tonsillectomy procedure and in same time, it plays significant rule in the improvement of outcomes of this common procedure as compared to the other commonly used non-steroidal anti-inflammatory drugs. However, the tonsillectomy is a commonest procedure in ENT specialty that creates the interest of the all levels of ENT surgeons, including juniors as well as seniors, thus continuous research activities are recommended to resolve all the issues and problems, which can be associated with this common procedure.

Ethical approval: the administrator of ALTAWRA central teaching hospital- ELByeda- Libya approved the research ethically.  

References

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