Randomized, Controlled, Study of Absorbable Nasal Packing on Outcomes of Surgical Treatment of Rhinosinusitis with Polyposis

A Biodegradable, Adhesive, and Stretchable Hydrogel and Potential Applications for Allergic Rhinitis and Epistaxis

Bioadhesive hydrogels have attracted considerable attention as innovative materials in medical interventions and human-machine interface engineering. Despite significant advances in their application, it remains critical to develop adhesive hydrogels that meet the requirements for biocompatibility, biodegradability, long-term strong adhesion, and efficient drug delivery vehicles in moist conditions. A biocompatible, biodegradable, soft, and stretchable hydrogel made from a combination of a biopolymer (unmodified natural gelatin) and stretchable biodegradable poly(ethylene glycol) diacrylate is proposed to achieve durable and tough adhesion and explore its use for convenient and effective intranasal hemostasis and drug administration. Desirable hemostasis efficacy and enhanced therapeutic outcomes for allergic rhinitis are accomplished. Biodegradation enables the spontaneous removal of materials without causing secondary damage and minimizes medical waste. Preliminary trials on human subjects provide an essential foundation for practical applications. This work elucidates material strategies for biodegradable adhesive hydrogels, which are critical to achieving robust material interfaces and advanced drug delivery platforms for novel clinical treatments.

Hyaluronic Acid in Rhinology: Its Uses, Advantages and Drawbacks-A Review

Hyaluronic acid has been increasingly involved in recent research due to its many chemical and physical properties. This is a review of the literature for studies involving the use of hyaluronic acid in rhinology. Hyaluronic acid washes and irrigation have been increasingly used in chronic sinusitis medical therapy and post-operatively with mixed results. It has also been shown to play a role in the treatment of nasal polyposis, allergic rhinitis, acute rhinosinusitis and empty nose syndrome. Its effect on biofilm in many disease entities has also been studied. HA is being recently used as ancillary treatment for several rhinologic conditions such as post-operative endoscopy care and chronic sinonasal infections. The properties of HA have intrigued researchers over the past years particularly in biofilm management, healing and inflammation.

Effect of chitosan-based gel dressing on wound infection, synechia, and granulations after endoscopic sinus surgery of nasal polyps: A meta-analysis

A meta-analysis was performed to evaluate the effect of chitosan-based gel dressing on wound infection, synechia, and granulations after endoscopic sinus surgery of nasal polyps. A systematic literature search until March 2022 incorporated 386 subjects after endoscopic sinus surgery of nasal polyps at the beginning of the study; 187 were using chitosan-based gel dressing, and 199 were control. Statistical tools like the dichotomous method were used within a random or fixed-influence model to establish the odds ratio (OR) with 95% confidence intervals (CIs) to evaluate the influence of chitosan-based gel dressing on wound infection, synechia, and granulations after endoscopic sinus surgery of nasal polyps. Chitosan-based gel dressing had significantly lower wound infection (OR, 0.48; 95% CI, 0.25-0.92, P = 0.03), and synechia (OR, 0.25; 95% CI, 0.13-0.50, P < 0.001) compared with control in subjects with endoscopic sinus surgery of nasal polyps. However, no significant difference was found in granulations between chitosan-based gel dressing and control in subjects with endoscopic sinus surgery of nasal polyps. Chitosan-based gel dressing had significantly lower wound infection, synechia compared with control in subjects with endoscopic sinus surgery of nasal polyps, and no significant difference in granulations. Further studies are required to validate these findings.

Green hemostatic sponge-like scaffold composed of soy protein and chitin for the treatment of epistaxis

Epistaxis is one of the most common otorhinolaryngology emergencies worldwide. Although there are currently several treatments available, they present several disadvantages. This, in addition to the increasing social need of being environmentally respectful, led us to investigate whether a sponge-like scaffold (SP–CH) produced from natural by-products of the food industry — soy protein and β-chitin — can be employed as a nasal pack for the treatment of epistaxis. To evaluate the potential of our material as a nasal pack, it was compared with two of the most commonly used nasal packs in the clinic: a basic gauze and the gold standard Merocel®. Our SP-CH presented great physicochemical and mechanical properties, lost weight in aqueous medium, and could even partially degrade when incubated in blood. It was shown to be both biocompatible and hemocompatible in vitro, clearing up any doubt about its safety. It showed increased blood clotting capacity in vitro, as well as increased capacity to bind both red blood cells and platelets, compared to the standard gauze and Merocel®. Finally, a rat-tail amputation model revealed that our SP-CH could even reduce bleeding time in vivo. This work, carried out from a circular economy approach, demonstrates that a green strategy can be followed to manufacture nasal packs using valorized by-products of the food industry, with equal or even better hemostatic properties than the gold standard in the clinic.

Comparison of Absorbable Packing versus No Packing in Wound Healing after Endoscopic Sinus Surgery: A Systematic Review and Pooled Analysis

INTRODUCTION

Nasal packing after endoscopic sinus surgery (ESS) is controversial. The aim of this systematic review was to compare absorbable packing versus no packing in wound healing after ESS for the treatment of chronic rhinosinusitis.

DATA SOURCE

English electronic databases, including Cochrane Library, EMBASE, MEDLINE, and PubMed, were searched, and only randomized controlled trials were included.

METHODS

The outcome measures were the presence of synechiae/adhesion formation, mucosal edema, crusting, granulation formation, and infection. The McNemar's test was used for pooled analysis.

RESULTS

Four studies with 148 participants were included. The pooled analysis showed that absorbable packing may offer benefit in reducing adhesion at 6-8 weeks (odds ratio [OR]: 0.3864; 95% confidence interval [CI]: 0.2136-0.7235) and 12 weeks (OR: 0.2396, 95% CI: 0.08267-0.7709) postoperatively compared with no packing. There was no significant difference between the packed and the unpacked side at 2, 6-8, and 12 weeks after ESS in terms of presence of crusting, edema, and granulation formation.

CONCLUSION

There is insufficient evidence to suggest that absorbable packing after ESS does not increase mucosal edema, granulation formation, and infection. However, the absorbable packing may be more effective than no packing for the prevention of mucosal adhesion after ESS. The use of absorbable nasal packing after ESS is recommended when used to reduce postoperative mucosal adhesion. More research in this area is clearly needed.

International consensus statement on allergy and rhinology: rhinosinusitis 2021

I.

EXECUTIVE SUMMARY

BACKGROUND: The 5 years since the publication of the first International Consensus Statement on Allergy and Rhinology: Rhinosinusitis (ICAR-RS) has witnessed foundational progress in our understanding and treatment of rhinologic disease. These advances are reflected within the more than 40 new topics covered within the ICAR-RS-2021 as well as updates to the original 140 topics. This executive summary consolidates the evidence-based findings of the document.

METHODS

ICAR-RS presents over 180 topics in the forms of evidence-based reviews with recommendations (EBRRs), evidence-based reviews, and literature reviews. The highest grade structured recommendations of the EBRR sections are summarized in this executive summary.

RESULTS

ICAR-RS-2021 covers 22 topics regarding the medical management of RS, which are grade A/B and are presented in the executive summary. Additionally, 4 topics regarding the surgical management of RS are grade A/B and are presented in the executive summary. Finally, a comprehensive evidence-based management algorithm is provided.

CONCLUSION

This ICAR-RS-2021 executive summary provides a compilation of the evidence-based recommendations for medical and surgical treatment of the most common forms of RS.

Polyurethane Versus Chitosan-Based Polymers Nasal Packs After Functional Endoscopic Sinus Surgery: A Prospective Randomized Double-Blinded Study

BACKGROUND

Different packing materials are applied to the nose at the end of surgery to maintain drainage and sinus ventilation of the paranasal sinuses and avoid some complications such as bleeding, infection, crustations, adhesions in the middle meatus and lateralization of the middle turbinate.

OBJECTIVE

The study aims to compare the clinical outcomes of two absorbable packing materials, the synthetic polyurethane, and the naturally occurring Chitosan-based polymers (CBP) nasal packs, after functional endoscopic sinus surgery.

METHODS

Fifty patients with bilateral chronic rhinosinusitis with nasal polypi were operated with 100 surgical cavities. At the end of the surgery, one side was randomly packed with synthetic polyurethane and the opposite side with CBP nasal pack. Measure their outcomes at week 1, 2, 4, 8 and 12 as the presence of remnants materials in the middle meatus, crustations, adhesions, bleeding, granulations, infection, and general satisfaction of patients.

RESULTS

CBP nasal pack shows a statistically significant advantage only in the first two weeks as regard remnants material, crusting and bleeding. All over the 12 weeks, there was no statistically significant difference between the two types of packs as regard granulations, adhesions and infection. In the first month, eight patients of the CBP group experienced bad smell and two patients had watery rhinorrhea as adverse reaction without a statistically significant difference. Patients were generally satisfied without a statistically significant difference between the two types of packs.

CONCLUSION

Synthetic polyurethane and Chitosan-based polymers nasal packs are safe and efficient regarding; the mucosal healing, bleeding control, and the overall satisfaction of patients. The CBP showed a higher statistically significant advantage in the first two weeks only regarding the amount of the retained material, crusting as well as bleeding. Patients packed with CBP experienced fish-like smelly odor and watery rhinorrhea but there is no statistically significant difference.

Q192R polymorphism in the PON1 gene and nasal polyp in a Turkish population

The pathogenesis of nasal polyps is not completely understood. Oxidative damage contributes to polyp formation in the nasal mucosa. The paraoxonase 1 (PON1) enzyme is an important liver enzyme with high antioxidant activity. In this study, we investigated the correlation between Q192R genotypic polymorphism of the PON1 enzyme and nasal-polyp disease. The study examined 62 nasal-polyp patients and 88 controls. PON1 Q192R polymorphism was determined using polymerase chain reaction-restriction fragment length polymorphism. The genotype distribution of the PON1 gene was significantly different between nasal-polyp patients (QQ = 69.35%, QR = 25.81%, RR = 4.83%) and healthy controls (QQ = 52.27%, QR = 44.31%, RR = 3.40%). Our results suggest that the PON1 QQ genotype (odds ratio [OR] = 2.066, P = .036) is associated with a higher risk of developing the nasal-polyp disease while QR genotype (OR = 0.437, P = .021) showed a lower risk.

Current and Alternative Therapies for Nasal Mucosa Injury: A Review

Nasal mucosa injury can be caused by trauma, radiotherapy, chronic infection such as sinusitis, and post sinus surgery. The rate of healing and its treatment are important in the recovery of patients especially in post sinus surgery, which introduces new injuries. In this review, the current knowledge in terms of the mechanism underlying nasal wound healing was initially discussed. The currently available treatment options for enhancement of wound healing following sinus surgery were discussed and these had included intravenous antibiotics or steroids, various nasal sprays, and nasal packing. In addition, emerging alternative therapies in nasal mucosa wound healing such as herbal medicine and the advancement of regenerative medicine therapies such as stem cells and their byproducts were also discussed. Despite the various available treatment options for wound healing in nasal mucosa, rigorous strong evidence of their efficacy is gravely warranted in order to recommend them as part of the treatment modality.

Steroid vs. antibiotic impregnated absorbable nasal packing for wound healing after endoscopic sinus surgery: a randomized, double blind, placebo-controlled study

Introduction

Endoscopic sinus surgery can lead to crusting or synechiae formation, which can affect the healing process.

Objective

The aim of our study was to compare the influence of steroid versus antibiotic versus saline solution impregnated absorbable nasal spacers on postoperative wound healing and patient satisfaction.

Methods

Eighty patients, 33 women and 47 men, were enrolled in this study. At the end of the surgery, two pieces of 4 cm biodegradable material were applied in each ethmoid cavity. One of them was impregnated with saline solution, while the second one with steroid, or with antibiotic.

Results

We observed statistically significant differences in the Lund–Kennedy score between the control and both treatment groups: for the Antibiotic-group on days 10 and 30 (p = 0.009; p = 0.009) and for the Steroid-group on day 90 (p = 0.008). The extended endoscopic appearance of nasal mucosa indicated statistically significant differences in crust formation on day 10 comparing the steroid and control dressing (p = 0.025), in secretion type on days 10 and 30 comparing the antibiotic and control dressing (p = 0.003; p = 0.016) and additionally for steroid and control on day 90 (p = 0.046). On Day 90 we observed statistically significant differences in the absence of mucosal edema in the S-group compared to controls (p = 0.007).

Conclusions

The results of this study reveal the significant positive influence of steroid- and antibiotic-impregnated biodegradable nasal packing on the postoperative healing process and patient satisfaction compared to the saline soaked dressing.

Influence of chitosan-based dressing on prevention of synechia and wound healing after endoscopic sinus surgery: A meta-analysis

INTRODUCTION

Endoscopic sinus surgery (ESS) has had many complications, e.g., synechia formation. This meta-analysis investigated the effect of a novel chitosan-based dressing on prevention of synechia and wound healing after ESS.

METHODS

We systematically searched various medical literature data bases and included the randomized controlled trials (RCT) regarding the effect of novel chitosan-based dressing on ESS. The study outcomes included synechia, granulations, hemostasis, crusting scores, and infection.

RESULTS

Six RCTs, which involved 337 patients, were included in the meta-analysis. Compared with control intervention after ESS, chitosan-based gel dressing substantially inhibited synechia (risk ratio [RR] 0.28 [95% confidence interval {CI}, 0.15-0.54]; p = 0.0001), improved granulations (RR 1.47 [95% CI, 1.07-2.03]; p = 0.02), and hemostasis (RR 1.47 [95% CI, 1.07-2.03]; p = 0.02) but demonstrated no effect on crusting scores (standard mean difference -0.41 [95% CI, -1.06 to 0.23]; p = 0.21) and infection (RR 0.88 [95% CI, 0.51-1.52]; p = 0.64).

CONCLUSION

Compared with control intervention, chitosan-based dressing was associated with significantly reduced synechia and with increased granulations and hemostasis but showed no influence on crusting and infection after ESS.

The clinical outcomes of using a new cross-linked hyaluronan gel in endoscopic frontal sinus surgery

In endoscopic sinus surgery (ESS) synechiae formation and ostial stenosis are frequently encountered. This is not uncommon after frontal recess and ostium interventions due to the narrow recess and difficult anatomy of the region. The goal of this study is to evaluate the efficacy of the new cross-linked hyaluronan gel-PureRegen^® Gel Sinus-on wound healing and synechiae prevention in endoscopic frontal sinus surgery. The study consists of two groups of patients who underwent ESS, including frontal sinus surgery. In the study group of 37 patients, PureRegen^® Gel Sinus was applied to both the frontal recess and ostium at the end of the procedure. The control group consisted of 28 patients. In this group, nasal dressing material was not applied at the end of surgery-neither to the frontal recess nor to the ostium. Postoperatively, epithelization was found to be significantly better at 2 and 4 weeks in the study group when compared with the findings in patients where no postoperative dressing was applied. In the eighth week, there was no significant difference found between the two groups in terms of epithelization. Synechiae formation was significantly lower in the PureRegen^® Gel Sinus group than the control group at all 2, 4 and 8 weeks postoperative evaluations. The effects of PureRegen^® Gel Sinus on wound healing, especially in reepithelization, have shown to occur earlier in the postoperative period. Rapid reepithelization and control of infection related granulation tissue formation with antibiotics in the early postoperative period may explain the low stenosis rate in frontal sinus ostia in PureRegen^® Gel Sinus applied patients.

Influence of hyaluronan nasal dressing on clinical outcome after endoscopic sinus surgery: A systematic review and meta-analysis

INTRODUCTION

Hyaluronan nasal dressing might be promising in promoting reepithelialization after endoscopic sinus surgery (ESS). However, the results remain controversial. We conducted a systematic review and meta-analysis to explore the effects of hyaluronan nasal dressing on clinical outcome after ESS.

METHODS

Medical literature data bases were systematically searched. Randomized controlled trials (RCT) that assessed the effect of hyaluronan nasal dressing on the outcome after ESS were included. The results were searched and data were extracted and assessed for quality. The primary outcome was reepithelization. Meta-analysis was performed by using the random-effect model.

RESULTS

Four RCTs, which involved 352 patients, were included in the meta-analysis. Overall, compared with control intervention, hyaluronan nasal dressing significantly promoted reepithelization (odds ratio [OR] 3.18 [95% confidence interval {CI}, 1.33-7.59]; p = 0.009) and reduced edema (OR 0.45 [95% CI, 0.23-0.89]; p = 0.02) after ESS. However, hyaluronan nasal dressing failed to reduce synechia (OR 0.45 [95% CI, 0.19-1.03]; p = 0.06), crust (OR 1.00 [95% CI, 0.20-5.09]; p = 1.00), and infection (OR 0.84 [95% CI, 0.46-1.53]; p = 0.56) compared with the control group in patients who underwent ESS.

CONCLUSION

Compared with "Control intervention" indicates standard nasal dressing without hyaluronan, resorbable hyaluronan nasal dressing could significantly improve reepithelization and decrease edema but had no influence on synechia, crust, and infection after ESS.

Healing of the nasal septal mucosa in an experimental rabbit model of mucosal injury

Objective

The aim of this study was to investigate the regeneration process of the nasal mucosa after a surgically created mucosal defect in the rabbit nasal septum, and to evaluate the effects of different interventions.

Methods

A 7 mm-diameter circular mucosal defect was made in the septum of forty New Zealand white rabbits. The rabbits were divided into four groups (ten rabbits in each group) according to the type of intervention; no treatment (control), silastic sheet (SS), hyaluronic acid (HA), and silastic sheet and hyaluronic acid (SS + HA) group. The diameter of the defect, mucosal thickness, epithelial thickness, and ciliated cell count were evaluated every week for five weeks.

Results

The average diameter of the defect in the control group were 5.1, 3.65, 1.2, 0.75, and 0.05 mm at postoperative 1, 2, 3, 4, and 5 weeks. In the SS group, the diameter decreased to 4.35, 2.1, 0.35, 0.15, and 0 mm at postoperative 1, 2, 3, 4, and 5 weeks, respectively, in which the mean diameter of the postoperative week 2 was significantly smaller compared to control (3.65 mm vs. 2.1 mm, P = 0.039). For the HA group and SS + HA group, the diameter of the defect did not show a significant difference from the control group during the five weeks. The mucosal thickness, epithelial thickness, and ciliated cell count of the regenerated mucosa were not significantly different among the groups.

Conclusion

The regeneration process of the nasal septal mucosa was identified using a novel rabbit model. Mucosal regeneration can be accelerated by applying silastic sheets.

Advances in Absorbable Biomaterials and Nasal Packing

Nasal biomaterials have been developed to improve postoperative outcomes after functional endoscopic sinus surgery (FESS). These products have been designed to overcome certain common complications in FESS, and to maximize patient comfort. This article evaluates the performance of nonabsorbable and absorbable packing with respect to these outcomes. The collected trials suggest superior performance of bioabsorbable packs compared with absorbable packs with respect to patient comfort. For hemostasis and wound healing, variation in performance metrics makes interstudy comparison difficult. Before further trials are conducted, consensus must be reached among rhinologists as to the proper method of evaluating these products.

Hyaluronic acid for post sinus surgery care: systematic review and meta-analysis

BACKGROUND

Wound healing after endoscopic sinus surgery may result in adhesion formation. Hyaluronic acid may prevent synechiae development. A systematic review was performed to evaluate the current evidence on the clinical efficacy of hyaluronic acid applied to the nasal cavity after sinus surgery.

METHODS

Studies using hyaluronic acid as an adjunct treatment following endoscopic sinus surgery for chronic rhinosinusitis were identified. The primary outcome was adhesion formation rates. A meta-analysis was performed on adhesion event frequency. Secondary outcome measures included other endoscopic findings and patient-reported outcomes.

RESULTS

Thirteen studies (501 patients) met the selection criteria. A meta-analysis of adhesion formation frequency on endoscopy demonstrated a lower risk ratio in the hyaluronic acid intervention group (42 out of 283 cases) compared to the control group (81 out of 282) of 0.52 (95 per cent confidence interval = 0.37-0.72). Hyaluronic acid use was not associated with any significant adverse events.

CONCLUSION

Hyaluronic acid appears to be clinically safe and well tolerated, and may be useful in the early stages after sinus surgery to limit adhesion rate. Further research, including larger randomised controlled trials, is required to evaluate patient- and clinician-reported outcomes of hyaluronic acid post sinus surgery.

Electrocauterization and no packing may be comparable with nasal packing for postoperative hemorrhage after endoscopic sinus surgery

BACKGROUND

Nasal packing is commonly performed after functional endoscopic sinus surgery (FESS). However, nasal packing is associated with higher cost (owing to the cost of packing materials), patient discomfort, delayed wound healing, and concern about toxic shock syndrome. Some surgeons have been performing FESS without packing, but there are few studies that show its safety.

OBJECTIVE

The purpose of this study was to evaluate the safety of electrocauterization and no packing.

METHODS

A total of 490 patients who underwent bilateral FESS for chronic rhinosinusitis were included in this retrospective study, 242 in the nasal packing group and 248 in the electrocauterization and no-packing group. Electrocauterization was performed by using a suction coagulator. Rates of immediate (first 24 hours after surgery) and delayed postoperative bleeding were compared. Patient characteristics, including concomitant disease and medication history, and Lund-Mackay computed tomography score were also assessed Results: There were no significant differences in age; sex; Lund-Mackay score; use of anticoagulant drugs; or prevalence of hypertension, diabetes, or asthma between the two groups. In the electrocauterization and no-packing group, there were fewer patients with allergic rhinitis and more smokers. Primary bleeding did not occur in the nasal packing group, but 11 patients (4.4%) had delayed bleeding. Primary bleeding occurred in four patients (1.7%) in the electrocauterization and no-packing group, and five patients (2.1%) had delayed bleeding. There were no significant differences in primary (p = 0.058) and secondary bleeding (p = 0.142) between the two groups. All bleeding was minor and easily controlled. Multivariate logistic regression analysis ruled out significant correlation between no packing and postoperative bleeding.

CONCLUSION

This study provided evidence that, in terms of postoperative hemorrhage, the safety of the electrocauterization and no-packing technique after FESS was comparable with that of nasal packing.

Evidence and evidence gaps in therapies of nasal obstruction and rhinosinusitis

Therapeutic decisions in otorhinolaryngology are based on clinical experience, surgical skills, and scientific evidence. Recently, evidence-based therapies have gained increased attention and importance due to their potential to improve the individual patient's treatment and their potential at the same time to reduce treatment costs. In clinical practice, it is almost impossible to stay ahead of the increasing mass of literature and on the other hand critically assess the presented data. A solid scientific and statistical knowledge as well as a significant amount of spare time are required to detect systematic bias and other errors in study designs, also with respect to assessing whether or not a study should be part of an individual therapeutic decision. Meta-analyses, reviews, and clinical guidelines are, therefore, of increasing importance for evidence-based therapy in clinical practice. This review is an update of the availability of external evidence for the treatment of nasal obstruction and rhinosinusitis. It becomes evident that both groups of diseases differ significantly in the availability of external evidence. Furthermore, it becomes obvious that surgical treatment options are normally based on evidence of significantly lower quality than medical treatment options.

Effects of triamcinolone-impregnated nasal dressing on subjective and objective outcomes following endoscopic sinus surgery

The aim of this study was to compare the effects of triamcinolone (TA)- and saline-soaked biodegradable nasal dressing on subjective symptoms, wound healing and improvement of olfactory dysfunction in patients with chronic rhinosinusitis with nasal polyposis (CRSwNP) after undergoing endoscopic sinus surgery (ESS). The study was a prospective, randomized, double-blinded, placebo-controlled study. A total of 80 patients undergoing bilateral ESS for CRSwNP were enrolled and randomly assigned to two groups. Nasal dressing was impregnated with normal saline in the control group, while patients received triamcinolone-impregnated dressing in the TA group. Sino-Nasal Outcome Test 20 (SNOT-20) and Korean Version of the Sniffin' Stick (KVSS) II test were used to assess the patients' condition preoperatively and at postoperative 1 and 3 months. Lund-Kennedy (L-K) and perioperative sinus endoscopy (POSE) scores were assessed on postoperative months 1, 2, and 3. There were significant differences between the control group and the TA group in terms of postoperative L-K scores and POSE scores at 1 and 2 months. The postoperative endoscopic scores were significantly decreased in the TA group compared to the control at 1 month. Olfactory functions were significantly improved at postoperative 3 months (p = 0.0099) compared to the preoperative score in the TA group. Significant improvement in the olfactory functions among anosmic and hyposmic patients at postoperative 1 month (p = 0.0475) and 3 months (p = 0.0019) compared to their preoperative olfactory function score was observed only in the TA group. TA-impregnated dressing had a significant advantage over saline-soaked dressing with regard to postoperative wound healing and improvement of olfactory function.

Clinical outcome and patient satisfaction using biodegradable (NasoPore) and non-biodegradable packing, a double-blind, prospective, randomized study

Introduction

Nasal packing after endoscopic sinus surgery is used as a standard procedure. The optimum solution to minimize or eliminate all disadvantages of this procedure may be accomplished using biodegradable packs.

Objective

The aim of this study was to compare patient satisfaction and clinical outcome associated with absorbable and non-absorbable packing after FESS.

Methods

In total, 50 patients were included in a prospective, double-blind, randomized trial. One side was packed with polyurethane foam, while the opposite side was packed with gauze packing. On the 2nd, 10th, and 30th postoperative day, the patients were questioned with the aid of a visual analog scale. The standardized questionnaires for bleeding, nasal breathing, feeling of pressure, and headache were used. The presence of synechiae, infection, or granulation was noted and recorded with the video-endoscopy.

Results

A significant difference according to lower pressure was found in the NasoPore group compared to the controls on day ten after surgery. The NasoPore packing had lower scores with respect to postoperative nose blockage on the 2nd and 10th days. Mucosal healing was better for the NasoPore group, both at day ten and 30 compared with the control group.

Conclusion

The overall patient comfort is higher when using NasoPore compared to non-resorbable traditional impregnated gauze packing. Intensive saline douches applied three to four times per day are mandatory after the operation to prevent synechiae formation and fluid resorption by the packing.

Biomaterials in Rhinology

Introduction

Many different kinds of rhinologic biomaterials, both nonabsorbable and absorbable, have been developed over the years to improve outcomes following endoscopic sinus surgery (ESS) for patients with chronic rhinosinusitis. In particular, these products have been designed to prevent postoperative bleeding, optimize the wound healing process, and reduce inflammation. This review evaluates the most recent evidence on biomaterials used in rhinology, focusing on these outcomes after ESS.

Data Sources

MEDLINE, Scopus, Google Scholar, and Clinicaltrials.gov.

Review Methods

A primary literature search based on the listed databases was performed with combinatorial search terms. Studies were considered for review if they met a set of inclusion and exclusion criteria.

Conclusions

Some products have performed better than others in clinical trials, although significant heterogeneity among studies does not allow for selection of a clearly superior biomaterial. While nonabsorbable biomaterials are still effective in achieving certain outcomes, newer, absorbable substances may be just as effective and avoid the morbidity associated with nasal packing removal. Steroid-eluting biomaterials have shown promising early results in reducing inflammation and promoting wound healing.

Implications for Practice

Certain absorbable biomaterials, such as chitosan gel and fibrin glue, have performed well with respect to postoperative hemostasis and wound healing, although they do not address mucosal inflammation. Steroid delivery systems may play an increasingly important role in reducing disease recurrence after ESS, although more studies are needed to assess long-term outcomes.

How effective is postoperative packing in FESS patients? A critical analysis of published interventional studies

The present study aimed to assess the clinical effectiveness of absorbable packing alone, non-absorbable packing alone, and absorbable versus non-absorbable packing in the postoperative care of FESS patients, regarding bleeding control, adhesion formation, wound healing, and overall patient comfort. Systematic literature review in Medline and other database sources until July 2013, and critical analysis of pooled data were conducted. Blinded prospective randomized control trials, prospective, and retrospective comparative studies were included in study selection. The total number of analyzed studies was 19. Placing packs in the middle meatus after endoscopic procedures does not seem to be harmful for postoperative patient care. Regarding the postoperative bleeding rate, absorbable packing is not superior to no postoperative packing (strength of recommendation A). Comparing absorbable to non-absorbable packing, the former one seems slightly more effective than the latter in the aforementioned domain (strength of recommendation C). Absorbable packing was also found more effective than non-absorbable packing as a means of reducing the postoperative adhesion rate (strength of recommendation B), and more effective in comparison with not placing any packing material at all (strength of recommendation C). Non-absorbable packing also proves more effective than no postoperative packing in preventing the appearance of such adhesions (strength of recommendation A). Absorbable packing is also more comfortable compared to non-absorbable materials (strength of recommendation A), or no postoperative packing in FESS patients (strength of recommendation B). The comparative analysis between the different packing modalities performed in the present study may help surgeons design a more individualized postoperative patient care.

Product comparison model in otolaryngology: Equivalency analysis of absorbable hemostatic agents after endoscopic sinus surgery

OBJECTIVES/HYPOTHESIS

Evidence-based medicine in otolaryngology literature continues to be lacking, especially with regard to new products brought to market. The marketing of products often includes statements of benefit that have limited objective support in research or literature. To address this, and to adequately determine product equivalency/superiority, careful evaluation must be made. In order to establish standards for this process in rhinology products, we directly compare three different absorbable hemostatic agents in patients with chronic rhinosinusitis (CRS) after undergoing endoscopic sinus surgery (ESS), using both objective and subjective outcomes.

STUDY DESIGN

Double-blinded prospective (level 1) comparison and equivalency analysis of three plant-based absorbable hemostatic agents (carboxymethylcellulose [CMC] gel, mucopolysaccharide hemospheres (MPH), and potato starch wafer) in patients undergoing bilateral ESS.

METHODS

Patients with medically refractory CRS who underwent bilateral ESS were recruited and prospectively followed. At the conclusion of ESS, one of three different hemostatic agents was applied to each nasal passage. Subjective patient data was obtained using rated symptoms compared between the two sides (nasal obstruction, bleeding, pain, and nasal discharge) at baseline and on postoperative days 1, 7, and 14. Objective data was obtained by blinded endoscopic scoring to rate mucosal edema, inflammation, granulation, crusting, infection, and synechiae formation on postoperative weeks 1, 3, and 6.

RESULTS

Forty-eight patients who underwent ESS for CRS were included. There is no statistical difference in subjective scores for any of the variables measured, although (MPH) nearly reached statistical significance at postoperative day 7 for increased pain (P = 0.06) and obstruction (P = 0.22). Objective measures showed equivalency between all products, except the CMC gel approached significance at week 3 for increased crusting (P = 0.10), granulation (P = 0.24), and debridement (P = 0.07). At 6 weeks, increased debridement (P = 0.14) also approached significance.

CONCLUSION

Careful and deliberate consideration should be taken when choosing products to assist our surgical endeavors. Subjectively, patients treated with MPH showed near-significant increases in pain and obstruction. In objective measures, CMC gel nearly reaches significance for more postoperative debridement, with increased crusting and inflammation. Product choice could consider these factors, although it remains at the discretion of the surgeon. This model of comparison allows careful product comparison and should be applied to other hemostatics, as well as other materials in use in otolaryngology.

LEVEL OF EVIDENCE

1b. Laryngoscope, 126:S5-S13, 2016.

The influence of spray cryotherapy on wound healing following endoscopic sinus surgery in chronic rhinosinusitis

OBJECTIVES/HYPOTHESIS

The aim of this study was to assess the influence of spray cryotherapy on wound healing following endoscopic sinus surgery (ESS).

STUDY DESIGN

A prospective, randomized, double-blinded, controlled trial.

METHODS

The study included 22 consecutive adult patients with chronic rhinosinusitis with and without polyps scheduled for bilateral ESS. At the end of the surgical procedure, patients were randomized to the distribution of spray cryotherapy in one middle meatus and saline contralaterally. Outcomes were only measured for endoscopy scores. Thus, postoperative healing and the amount of edema, crusting, secretions, and scarring were assessed using the validated Lund-Kennedy and Perioperative Sinus Endoscopy (POSE) scores.

RESULTS

There were no baseline differences concerning POSE and Lund-Kennedy scores between the two groups. Nevertheless, a significant difference was recorded at one, 2, 4, 8, and 12 weeks in both POSE (P = .001, P = .012, P = .02, P = .006, P = .001) and Lund-Kennedy (P = .002, P = .005, P = .02, P = .02, P = .03) scores.

CONCLUSIONS

These preliminary results reveal an improvement in postoperative scores, demonstrating enhanced healing following spray cryotherapy. However, without patient subjective outcomes, the study is limited. Additional studies with longer follow-up and larger samples are needed to describe the effects of cryotherapy on wound healing.

Biodegradable nasal packings for endoscopic sinonasal surgery: a systematic review and meta-analysis

OBJECTIVES

To assess biodegradable nasal packing effectiveness for improving postoperative symptoms and mucosal healing after endoscopic sinonasal surgery as compared with conventional/non-packing groups.

METHODS

Relevant articles were searched on PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials. We included randomized controlled trials (RCTs) that compared biodegradable packings with conventional packings or no packing, reporting postoperative symptoms and/or mucosal healing outcomes.

RESULTS

This review included 19 studies, of which 11 compared biodegradable packings with conventional packings. Meta-analysis found that biodegradable packings significantly improved postoperative symptoms: bleeding at removal, pain at removal, pain in situ, and nasal blockage. Mucosal healing outcomes were inconsistent within studies, with no data could be pooled. Eight studies compared biodegradable packings with non-packing group. Postoperative symptom data in this comparison could not be pooled: A protective or equal effect on postoperative bleeding was reported in different studies; no difference was reported in pain status and nasal blockage. As for mucosal healing, meta-analysis showed that two arms of comparison had similar effect on synechiae, edema, infection and granulation at each time point.

CONCLUSION

The limiting evidence suggests that biodegradable nasal packings are statistically better than conventional packings in postoperative symptoms, and probably comparable to non-packing group, as in this comparison we could not carry out meta-analysis. No beneficial or detrimental effect on postoperative mucosal healing could be determined based on existing evidence.

Hyaluronan in the Treatment of Chronic Rhinosinusitis with Nasal Polyposis

Chronic rhinosinusitis (CRS) is a common condition and affects the quality of life of approximately 16 % of adults in US and 10.9 % in Europe. Hyaluronan (HA) is a nonsulphate glycosaminoglycan found in the extracellular matrix of connective tissues, and plays an important role in the healing process and repair of mucosal surfaces. We aim to evaluate the effect of HA on nasal symptoms and endoscopic appearance in patients with CRS and nasal polyps (NP) who have not undergone sinus surgery. Eighty patients older than 18 years old were randomized to receive either open-label nebulized saline solution (NS) or intranasal corticosteroid spray (ICS) 200 µg bid or nebulized sodium hyaluronate (NHA, YABRO(®)) or both ICS and NHA. Results were collected at 1 month, 3 months and 3 months after treatment. Significant improvements in nasal symptoms scores, endoscopic appearance scores, radiologic scores, rhinomanometry and saccharine clearance test were observed in the NHA, ICS and ICS + NHA groups after 1 month and 3 months of treatment compared with baseline (all p ≤ 0.005). The use of oral steroids was significantly reduced after 3 months of therapy in the same groups versus baseline (all p < 0.05). The incidence of adverse events at 3 months was similar between the 4 groups (all p > 0.05). Throat irritation, nasal burning and drug-related epistaxis were not reported in the group NHA. HA, as a nebulized nasal douche preparation, improved nasal symptoms and endoscopic appearances in patients with CRS and NP who have not undergone sinus surgery.

Comparative analysis of Cutanplast and Spongostan nasal packing after endoscopic sinus surgery: a prospective, randomized, multicenter study

Commercial gelatin-based packing materials are available under different names and compositions to be used after endoscopic sinus surgery (ESS). The purpose of this study was to investigate the efficacy of Spongostan and Cutanplast nasal packing on patients' subjective symptoms, hemostasis, and wound healing following ESS. One hundred adult patients with chronic sinusitis requiring the same extent of ESS were included. Following surgery, one nasal cavity was packed with Cutanplast and the other one with Spongostan. Patients' subjective symptoms while the packing was in situ, hemostatic properties, degree of remaining amount of packing materials, postoperative wound healing, and the cost of the pack were evaluated. Cutanplast and Spongostan are equally effective in the control of postoperative bleeding following ESS. However, Cutanplast packing was significantly more comfortable than Spongostan for nasal obstruction, postnasal drip, rhinorrhea, and headache. Furthermore, the Cutanplast packing was significantly less painful at all time points. The remaining amount of the pack was significantly lower in the Cutanplast than Spongostan packing. Spongostan packing appears to impair wound healing within the sinus cavities up to 3 months postoperatively. Cutanplast was less expensive than Spongostan as used in this study. Cutanplast may be more useful gelatin-based packing material than Spongostan in terms of efficacy and cost-benefit after ESS.

Absorbable and nonabsorbable packing after functional endoscopic sinus surgery: systematic review and meta-analysis of outcomes

The purpose of the study was to perform a systematic review and meta-analysis of the literature to compare the efficacy (and other postoperative outcomes) of nonabsorbable versus absorbable nasal packing after functional endoscopic sinus surgery (FESS) for the treatment of chronic rhinosinusitis. Studies were considered for inclusion if they were published in English language, were randomized clinical trials, and reported on outcomes following postoperative synechia. The primary outcome for meta-analysis was the incidence of postoperative synechia; pooled odds ratios (ORs) and 95 % confidence intervals (CIs) were calculated using fixed-effects models. Five studies, involving 241 nasal cavities in each treatment group, were included in the systematic review. The prevalence of synechia ranged from 4.6 to 8.0 % in the absorbable groups and from 8.0 to 35.7 % in the nonabsorbable groups. Postoperative bleeding was lower in the absorbable groups, whereas there was no clear finding regarding postoperative pain. Postoperative edema was generally similar between groups. There were no consistent findings regarding bleeding and pain on packing removal. Two studies using the same type of packing material were included in the meta-analysis. The combined OR (0.33, 95 % CI 0.04–2.78) for postoperative synechia did not significantly favor (P = 0.308) absorbable packing over nonabsorbable packing. Although there is some evidence in the available literature that absorbable nasal packing may provide superior outcomes to nonabsorbable packing after FESS, the lack of homogeneity between studies makes definitive conclusions impossible. Further randomized clinical trials are needed to compare the efficacy of different types of absorbable nasal packing for preventing synechia after FESS.

Anti-adhesive effect of a thermosensitive poloxamer applied after the removal of nasal packing in endoscopic sinus surgery: a randomised multicentre clinical trial

OBJECTIVE

To compare the efficacies of a thermosensitive poloxamer (TPX) and Merogel in preventing adhesion applied after the removal of nasal packing in endoscopic sinus surgery as a non-inferiority trial.

DESIGN

Randomised, multicentre, single-blind, active-controlled, matched-pair study.

SETTING

Yonsei University Gangnam Severance Hospital, Korea University Guro Hospital.

PARTICIPANTS

A total of 70 patients were enroled and underwent endoscopic sinus surgeries. Four of the patients did not complete their follow-up. Analysis of the 66 enroled patients having completed postoperative assessment was performed. The severity of rhinosinusitis was graded with a Lund-McKay CT score, and only those with bilateral disease and a CT score difference ≤2 between sinuses were included.

MAIN OUTCOME MEASURES

An independent rhinologist from a third institution through a blinded assessment with digital photoendoscopy of the middle meati bilaterally taken postoperatively.

RESULTS

In the blinded assessment, thermosensitive poloxamer (anti-adhesion rate: 92%) was similar to Merogel (anti-adhesion rate: 89%). Evaluation of the presence and grade of adhesion, oedema, and infection in the middle meatus revealed no significant differences between the thermosensitive poloxamer group and the Merogel group at all postoperative periods.

CONCLUSION

Anti-adhesive effects of thermosensitive poloxamer are similar to those of Merogel. Therefore, thermosensitive poloxamer can be considered a safe alternative to Merogel for preventing adhesion in patients undergoing endoscopic sinus surgeries, and further evaluation of thermosensitive poloxamer as an anti-adhesive and primary packing material compared with the control using no packing is needed.

A Prospective Double-Blinded Randomized Controlled Study Comparing the Efficacy of a Novel Biodegradable Synthetic Polyurethane Foam (Nasopore) vs Standard Polyvinyl Acetate Sponge (Merocel) as Packing Material after Functional Endoscopic Sinus Surgery: The First Indian Experience

Background

In Indian clinical practice, conventional nasal packing for hemostasis after routine rhinological surgery is usually performed with Vaseline (paraffin) gauze, and rarely with glove-finger packs or tamponade balloons. These materials are tedious to pack and cause discomfort to the patient on removal. Newer nasal packs which have recently emerged in the Indian scenario are found to be more user-friendly, equally effective for hemostasis and less traumatic to the operated nasal mucosa. Most rhinologists today, prefer to use polyvinyl acetate sponge packs (Merocel/Ivalon) for tamponade after nasal surgery. These packs are very effective but non-absorbable and need to be removed which does not augur well with many patients postoperatively. The recent entry of a biodegradable synthetic polyurethane foam (Nasopore) as an alternative nasal packing material, has evoked new interest, which initiated this study.

Study method

This prospective randomized double-blinded controlled study was aimed to compare the clinical efficacy and patient comfort level, while using Merocel and Nasopore as packing material after functional endoscopic sinus surgery (FESS). This study included thirty adults who were diagnosed with moderate to severe bilaterally comparable chronic rhinosinusitis, who underwent FESS under general anesthesia and received size-matched nasal packs randomly - Merocel on one side and Nasopore on the other. The assessment of clinical efficacy of both packs with regards to ease of packing, hemostasis, pressure effects, infections and adhesions was done with a Diagnostic Nasal Endoscopy at first postoperative day, first week and fourth week after surgery. All Merocel packs were removed on the first postoperative day. Patient comfort levels for both packs were recorded with a standard symptom questionnaire marked on a visual analogue scale of ten and the results were statistically compared between the two groups.

Results

Comparable outcomes were found while using Merocel or Nasopore with regards to ease of nasal packing and control of postoperative bleeding. There was a statistical difference in the hemostatic property between the two materials in the immediate postoperative period. Five out of 30 patients developed reactionary bleeds with Nasopore, which required repacking with same material within the first 24 hours, but no further bleeds were noted. Two out of these five patients on the first postoperative day had migration of Nasopore toward the choana and had to be repacked with additional Nasopore. Sequential postoperative nasal endoscopy revealed that Nasopore is more mucosal friendly with lesser incidence of adhesions, synechiae, infection and edema, with better biocompatibility and safety. The major success with Nasopore was found to be, the fact that no pack removal was necessary, which immensely improved patient satisfaction and willingness to use the material when compared to Merocel. This was proved by the patient's symptom questionnaire which showed significant benefits of Nasopore over Merocel with regards to compliance and comfort levels.

Conclusion

Nasopore is a novel biodegradable synthetic material which is clinically as efficacious and patient-friendly as Merocel and is suitable for postoperative nasal packing after functional endoscopic sinus surgery. The clinical benefits of Nasopore and its outcomes among patients as recorded in our study, stands proof to support Nasopore as a successful packing material in rhinological surgery.

How to cite this article

Raghunandhan S, Kameswaran M, Thomas JK. A Prospective Double-Blinded Randomized Controlled Study Comparing the Efficacy of a Novel Biodegradable Synthetic Polyurethane Foam (Nasopore) vs Standard Polyvinyl Acetate Sponge (Merocel) as Packing Material after Functional Endoscopic Sinus Surgery: The First Indian Experience. Clin Rhinol An Int J 2014;7(3):105-111.

Comparison of Ropivacaine, Bupivacaine, Prilocaine, and Lidocaine in the Management of Pain and Hemorrhage during Nasal Pack Removal

Background

This study investigates the effects of local anesthetics application on pain and hemorrhage caused by nasal pack removal.

Methods

The study included 140 patients. Of these, 72 were women and 68 were men. The mean age and weight of the patients were 33.67 ± 10.2 years (range, 21–63 years) and 69.6 ± 13.6 kg. The patients were divided randomly into four groups. Three of the four groups received one of the local anesthetics studied in our trial (lidocaine + adrenaline, 0.25% bupivacaine, or 2% prilocaine) before removal of the nasal packing material and the control group received saline solution. Local anesthetics and 0.9% saline solution were applied to Merocel nasal packs 15 minutes before removal. Each patient was given a questionnaire where verbal analog score and amount of postoperative hemorrhage was noted.

Results

The mean pain score was 3.5 ± 1.2 (median, 4; range, 3–5) in the lidocaine group, 4.5 ± 1.2 (median, 4; range 3–5) in the prilocaine group, 4.7 ± 1.3 (median, 6; range, 3–5) in the bupivacaine group, and 6.35 ± 1.2 (median, 6; range, 5–7) in the saline group during nasal packing removal. The lidocaine group had significantly better pain scores versus other groups (p < 0.05). Bupivacaine and prilocaine had significantly better pain scores versus the control group, respectively. Analysis of bleeding scores after pack removal showed that all three study groups had significantly better bleeding scores versus the control saline group (p < 0.05). The lidocaine group had significantly less bleeding score than bupivacaine and prilocaine groups (p < 0.05).

Conclusion

Topical lidocaine application before removal of nasal packs in patients who undergo nasal septal surgery can decrease discomfort and bleeding and improve patient tolerance.

The clinical outcomes of new hyaluronan nasal dressing: a prospective, randomized, controlled study

BACKGROUND

Poor postoperative wound healing after endoscopic sinus surgery (ESS) remains a significant problem. This study evaluates the efficacy and safety of a new absorbable hyaluronan hydrogel.

METHODS

A prospective, randomized, controlled trial was conducted. Fifty-five patients with bilateral ESS were recruited and randomized to receive absorbable hyaluronan hydrogel in one side as treated and the opposite side without absorbable hyaluronan hydrogel as control. Clinical outcome measures were assessed at postoperative 1, 2, 4, 8, and 12 weeks.

RESULTS

Fifty-four patients completed the study. Overall, absorbable hyaluronan hydrogel significantly promotes the reepithelization process and reduces the presence of obstructing synechia, nonobstructing synechia, edema, crust, and mild mucopurulent drainage (all p ≤ 0.0002). At all postoperative follow-up visits, the promotion in reepithelization is statistically significant at 2, 4, and 8 weeks, and the reductions in the presence of nonobstructing synechia, edema, crust, and mild mucopurulent drainage are all statistically significant except for the presence of crust at 12 weeks and mild mucopurulent drainage at 1 and 12 weeks. Although the presence of obstructing synechia at each follow-up visit between groups does not reach statistical significance, the incidence ranges from 5.56 to 12.96% in the control group and from 0 to 3.70% in the treated group. No adverse event related to treatment was observed.

CONCLUSION

In this clinical study, data analyses suggest that this new absorbable hyaluronan hydrogel, as nasal dressing/packing after ESS is safe and promotes the postoperative reepithelization process and reduces the presence of synechia, edema, crust, and mild mucopurulent drainage.

A systematic review of nonabsorbable, absorbable, and steroid-impregnated spacers following endoscopic sinus surgery

BACKGROUND

Middle meatal (MM) spacers may reduce adhesions following endoscopic sinus surgery (ESS). However, there is no consensus as to which materials and adjuncts are the most effective for this purpose. The primary objective of this study was to examine the effectiveness of absorbable spacers (AS) vs nonabsorbable spacers (NAS) in reducing adhesions following ESS for chronic sinusitis. Secondarily, we assessed steroidal vs nonsteroidal MM spacers in reducing adhesions.

METHODS

Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a systematic review of randomized controlled trials (RCTs) was conducted and a meta-analysis on relevant outcome data was performed. Electronic search was done using OVID MEDLINE, EMBASE, Cochrane Central register of Controlled Trials, and Web of Science. Independent data extraction and evaluation was conducted.

RESULTS

For our primary objective, 6 RCTs were included in the systematic review. A pooled estimate of relevant trials revealed a nonsignificant trend favoring AS in reducing adhesion formation compared to NAS (Relative Risk (RR), 0.40; 95% confidence interval [CI], 0.15-1.03). This trend was not apparent if NAS are left for greater than 48 hours after ESS. For our secondary objective, we identified 5 RCTs that compared steroidal vs nonsteroidal spacers. Although a pooled analysis could not be achieved due to inconsistent reporting of MM adhesions, 2 studies demonstrated significantly less adhesions in the steroidal spacer group.

CONCLUSION

Comparison between NAS and AS showed that there was no significant difference in adhesion rates if NAS are used for at least 48 hours after surgery. Steroidal spacers may reduce adhesions, but more consistent data reporting is required for meta-analysis.

Antibodies directed against integration host factor mediate biofilm clearance from Nasopore

OBJECTIVES/HYPOTHESIS

Intranasal resorbable packing, such as Nasopore, is commonly used during sinus surgery despite a paucity of evidence that demonstrates clinical benefit. We theorized that Nasopore supports bacterial growth and biofilm formation. The DNABII family of bacterial nucleic acid binding proteins stabilizes the extracellular polymeric substance of the biofilm, thus protecting bacteria from host defenses and traditional antibiotics. We tested the hypothesis that use of anti-IHF antibodies in conjunction with antibiotics would enhance biofilm eradication from Nasopore.

STUDY DESIGN

In vitro experiments.

METHODS

Nontypeable Haemophilus influenzae (NTHI) biofilms were grown on Nasopore. Following 24-hour incubation, biofilms were incubated for an additional 16 hours with either medium alone, naïve rabbit serum, rabbit anti-IHF serum, amoxicillin/clavulanate, or anti-IHF serum + amoxicillin/clavulanate. Computer statistics (COMSTAT) analysis was performed on images of biofilms obtained via confocal microscopy.

RESULTS

NTHI readily formed a biofilm on Nasopore. Treatment with amoxicillin/clavulanate alone mediated an increase in biomass by 92% to 6.63 μ(2) /μ(3) compared to incubation in sterile medium alone (3.46 μ(2) /μ(3)). Treatment with anti-IHF alone reduced the biomass by 77% to 1.29 μ(2) /μ(3) compared to incubation with naïve rabbit serum (5.53 μ(2) /μ(3)). Anti-IHF + amoxicillin/clavulanate reduced biomass by 88% to 0.66 μ(2) /μ(3) (P <0.02) compared to incubation with naïve rabbit serum.

CONCLUSION

Antibiotics alone were ineffective in eradicating NTHI biofilms that had formed on Nasopore in vitro. Anti-IHF antibodies plus amoxicillin/clavulanate therapy synergistically reduced biofilm biomass by 88%. These data support clinical studies for the use of anti-IHF combined with antibiotics to reduce biofilm formation on intranasal packing.

State of the art treatment of nasal polyposis

BACKGROUND

Nasal polyposis represents the end point of multiple inflammatory pathways and controversy continues as to the exact roles of medical and surgical approaches in the management of nasal polyposis.

METHODS

A combination of both is often required to manage polyps adequately with surgery and intranasal steroids remaining the mainstay of therapy.

RESULTS

Fortunately, new technological advances are making surgery safer and more efficient. In the postoperative period, debridement is effective in reducing the formation of adhesions, and topical medications may play a beneficial role in preventing polyp reformation.

CONCLUSION

Additional investigations into the optimal perioperative medical management is needed to ensure optimal surgical outcomes.

The evaluation of two new hyaluronan hydrogels as nasal dressing in the rabbit maxillary sinus

BACKGROUND

The postoperative scaring, ostial stenosis, and adhesions after functional endoscopic sinus surgery for chronic rhinosinusitis remains a major problem. This study was designed to evaluate two new hyaluronan (HA) hydrogels for neo-ostium antistenosis and promoting wound healing in a rabbit maxillary sinus model.

METHODS

The anterior wall of the maxillary sinus of 48 rabbits was removed to create a 4-mm circumferential wound both on the nasal and on the sinus sides. A rapid-gelling HA hydrogel or preformed HA hydrogel was filled randomly into the right or left sinus, while the opposite sinus served as blank control or was treated with Merogel (Medtronic Xomed Surgical Products, Jacksonville, FL) as control. The neo-ostium diameter and histological scores were evaluated and analyzed postoperatively.

RESULTS

The neo-ostium diameter in the rapid-gelling HA hydrogel-treated side was significantly larger than that in the blank control side with a mean difference of 1.46 ± 0.99 mm (p = 0.03), 1.30 ± 0.61 mm (p = 0.0087), and 1.60 ± 0.25 mm (p = 0.00015) at 2, 3, and 4 weeks, respectively; the neo-ostium diameter in the preformed HA hydrogel-treated side at 2 weeks was significantly larger than that in the blank control side or Merogel control side with a mean difference of 1.46 ± 0.76 mm (p = 0.002) or 0.54 ± 0.36 mm (p = 0.007), respectively. The preformed HA hydrogel-treated side showed better histology scores at 2 weeks in heterophils, fibrosis, and osteogenesis than the blank control, and the chronic inflammation (lymphocyte/plasmacyte infiltration) was not prevalent.

CONCLUSION

During the postoperative follow-up period both of the two HA hydrogels significantly prevented neo-ostium stenosis and the preformed HA hydrogel promoted wound healing.

Management of early nasal polyposis using a steroid-impregnated nasal dressing

BACKGROUND

Oral corticosteroids are the mainstay of medical management of sinonasal polyposis. However, systemic steroid-related side effects can be significant in both the short-term and long-term. Topical targeted steroids in optimal concentrations to the affected mucosa present an attractive alternative. The objective of this study was to compare the efficacy of steroid impregnated absorbable nasal dressing with oral steroids in the management of early nasal polyposis after endoscopic sinus surgery.

METHODS

A total of 21 symptomatic patients with nasal polyposis presenting with endoscopic findings of early polyposis received triamcinolone-impregnated (20 mg/mL) nasal dressing (Nasopore; Stryker Canada). A control group of 20 similar patients were treated with a short course of oral steroids. Evaluation was based on Sinonasal Assessment Questionnaire (SNAQ-11) and Perioperative Sinus Endoscopy (POSE) score at baseline, 4-week, and 8-week follow-up intervals.

RESULTS

At baseline, 4 weeks, and 8 weeks mean SNAQ scores were 18.42, 8.76, and 9.42 in the study group and 19.35, 7.15, and 7.60 in the control group, respectively. Mean POSE scores were 12.14, 5.04, and 6.04 in the study group and 13.52, 5.01, and 5.52 in the control group, respectively. No significant difference was found between the groups at 4 and 8 weeks in either SNAQ (p = 0.129, p = 0.235) or POSE (p = 0.803, p = 0.795) scores.

CONCLUSION

Triamcinolone-impregnated absorbable nasal dressing is comparable to oral steroids in the management of early nasal polyposis after sinus surgery.

Evaluation of symptoms and QOL with calcium alginate versus chitin-coated gauze for middle meatus packing after endoscopic sinus surgery

OBJECTIVE

Nasal packing is used to control postoperative bleeding and wound healing, and it also exerts a very strong influence on the comfort of the patient. Sorbsan(®) (calcium alginate) is an absorbent packing that shows a potent hemostatic effect and is able to maintain wound surfaces in a moist environment by absorbing and gelling the wound exudate. The aim of this study was to evaluate the early symptoms and QOL with Sorbsan(®) versus Beschitin-F(®) (chitin-coated gauze) for middle meatus packing after endoscopic sinus surgery (ESS).

METHODS

We performed a cohort study of 40 patients who underwent ESS. Following ESS, the patients were randomly allocated into two groups of 20 patients each who underwent insertion of either Sorbsan(®) or Beschitin-F(®) into the middle meatus. A daily diary was used to record the symptoms and QOL, measured using visual analogue scales, before the ESS and on each day thereafter. Postoperative bleeding and local infection were also recorded.

RESULTS

The scores for each of the symptoms of nasal pain, headache, nasal bleeding and postnasal drip were statistically significantly lower in the Sorbsan(®) group. The scores for each of the QOL parameters, including the effect on their stay in the hospital and sleep disturbance, were also significantly lower in the Sorbsan(®) group. There were no findings of postoperative hemorrhage or local infection in either group.

CONCLUSION

Sorbsan(®) packing did not cause any major complications and has the potential to reduce nasal pain and suffering in post ESS patients compared with gauze packing.

Perioperative and intraoperative maneuvers to optimize surgical outcomes in skull base surgery

There are many approaches to obtaining a workable endoscopic surgical field in sinus surgery. With extended sinus and transdural endoscopic surgery, a more rigid approach must be taken. There are 3 main factors that invariably lead to poor surgical outcomes in endoscopic sinus and skull base surgery: bleeding, inadequate access, and unidentified anatomic anomalies. Bleeding is arguably the most common reason for incomplete resection. An understanding of microvascular and macrovascular bleeding allows a more structured approach to improve the surgical field in extended endoscopic surgery. The endoscopic surgeon should always be comfortable in performing the same procedure as an open operation. However, converting or abandoning an endoscopic procedure should rarely occur because much of this decision making should take place preoperatively. Along with poor hemostasis, inadequate access is an important cause of poor outcome. Evaluation of the anatomy involved by pathology but also the anatomy that must be removed to allow adequate exposure is important. This article reviews the current techniques used to ensure optimal surgical conditions and outcomes.

Triamcinolone-impregnated nasal dressing following endoscopic sinus surgery: a randomized, double-blind, placebo-controlled study

OBJECTIVES/HYPOTHESIS

To evaluate the impact of steroid-impregnated absorbable nasal dressing on wound healing and surgical outcomes after endoscopic sinus surgery (ESS).

STUDY DESIGN

A prospective, randomized, double-blinded, placebo-controlled trial.

METHODS

Chronic rhinosinusitis patients with polyposis who were to undergo bilateral endoscopic sinus surgery were recruited and randomized to receive triamcinolone-impregnated bioresorbable dressing (Nasopore; Stryker Canada, Hamilton, Ontario, Canada) in one nasal cavity and saline-impregnated dressing contralaterally. Postoperative healing assessments of edema, crusting, secretions, and scarring were done at postoperative days 7, 14, 28 and at 3 and 6 months using validated Lund-Kennedy and Perioperative Sinus Endoscopy (POSE) scores.

RESULTS

Analysis of 19 enrolled patients having completed observation shows no significant difference between the cavity scores preoperatively using both the POSE and Lund-Kennedy scores. There was, however, a statistically significant difference at day 7 and 14 in both the Lund-Kennedy (P = .04 and P = .03, respectively) and POSE scores (P = .03 and P = .001, respectively) for the treatment and control groups, and a significant difference was also detected between the groups at 3- and 6-month observations (Lund-Kennedy, P = .007 and P = .02, respectively; POSE, P = .049 and P = .01, respectively).

CONCLUSIONS

Data analysis suggests a significant improvement in early postoperative healing in nasal cavities receiving triamcinolone-impregnated absorbable nasal packing following ESS and is also associated with improved healing up to 6 months postoperatively.

The efficacy of a novel chitosan gel on hemostasis and wound healing after endoscopic sinus surgery

BACKGROUND

Postoperative bleeding and adhesion formation are the two most common complications after endoscopic sinus surgery (ESS). Continued bleeding risks airway compromise from the inhalation of blood clots and from the aspiration of blood-stained vomitus. Additionally, adhesion formation is the most common reason for patients requiring revision surgery. This study aimed to determine the efficacy of a novel chitosan/dextran (CD) gel on hemostasis and wound healing after ESS.

METHODS

A randomized controlled trial was performed involving 40 patients undergoing ESS for chronic rhinosinusitis. Immediately after surgery a baseline Boezaart Surgical Field Grading Scale was taken. Computer randomization was performed with one side receiving CD gel and the other side receiving no treatment (control). Boezaart bleeding scores were then calculated for each side every 2 minutes. Patient's endoscopic features of wound healing were assessed at 2, 6, and 12 weeks after surgery.

RESULTS

CD gel achieved rapid hemostasis with the mean time to hemostasis at 2 minutes (95% CI, 2-4 minutes) compared with 10 minutes (95% CI, > or =6 minutes) for the control (p < 0.001). There were significantly less adhesions at all time points with CD gel versus control: 2 versus 18 at 2 weeks (p < 0.001), 3 versus 16 at 6 weeks (p < 0.001), and 2 versus 12 at 3 months (p < 0.001). There was no significant difference between CD gel and control with respect to crusting, mucosal edema, infection, or granulation tissue formation.

CONCLUSION

CD gel is rapidly hemostatic immediately after ESS and prevents adhesion formation, addressing two of the most common complications of sinus surgery.

Nasal dressings after endoscopic sinus surgery: what and why?

PURPOSE OF REVIEW

Nasal dressings are commonly used following endoscopic sinus surgery in an attempt to prevent ongoing bleeding and to modulate the wound healing process. Experience with nasal dressings in the otolaryngologic literature spans more than half a century; however, despite this, there is still little agreement between surgeons on the optimal choice of nasal dressings following endoscopic sinus surgery, or whether nasal dressings are required at all. This paper briefly reviews the past research and examines recent advances in the area of nasal dressings.

RECENT FINDINGS

The ideal nasal dressing is one that is absorbable, hemostatic and improves healing. Although a number of currently available materials may address one of these features, none address all. Currently available dressings that achieve hemostasis worsen wound healing outcomes. However, recent research shows promise with microporous polysaccharide hemospheres and chitosan gel having promising effects on hemostasis, and chitosan gel showing a significant adhesion prevention effect.

SUMMARY

The sinus surgeon must be aware of the potential advantages and limitations of currently available nasal dressings. The area of wound healing and adhesion prevention remains an area of active research and more prospective controlled trials are needed to define any benefits biomaterials may have.

Advances in absorbable biomaterials and nasal packing

Absorbable biomaterials are commonly used after endoscopic sinus surgery, both for hemostatic and wound healing considerations. Although removable nasal packing is the traditional method of controlling ongoing bleeding and modulating wound healing, it is uncomfortable for patients and associated with several complications. Currently available absorbable agents frequently incite an inflammatory reaction and have been shown in animal and human trials to adversely affect the wound healing process. Newer agents offer distinct advantages because of their unique composition and rapid clearance profiles. The selection of packing material used in any given sinus procedure should be based on surgeon preference and the details of the specific case.

Effect of Microporous Polysaccharide Hemospheres (MPH) on Bleeding after Endoscopic Sinus Surgery

OBJECTIVES: Absorbable hemostatic agents are commonly used after endoscopic sinus surgery (ESS). MPH (microporous polysaccharide hemospheres) is a novel hemostatic powder that is rapidly absorbed. The goal of this study was to examine the effects of MPH on bleeding after ESS.

STUDY DESIGN: Randomized, controlled, single-blinded.

SETTING: Tertiary university hospital.

SUBJECTS AND METHODS: Patients undergoing bilateral (symmetric) ESS for CRS by the same surgeon were randomized to unilateral treatment with MPH at surgical conclusion. The untreated opposite side served as a control. All patients received standard postoperative management. Patients completed symptom diaries using visual analog scales (VAS, scored out of 100) at baseline and through postoperative day (POD) 30. Outcomes including bleeding, pain, obstruction, and nasal discharge were recorded separately for left and right sides.

RESULTS: Forty patients (19 men, 21 women) with an average age of 48.3 years were included. There were no complications, and all patients were discharged home the same day. The mean bleeding score on POD one for MPH-treated sides was 22.5 vs 39.0 for untreated controls (mean reduction 16.5, P < 0.0001, 95% CI −23.2 to −9.7). The scores for bleeding at baseline and at all other post-treatment days were not significantly different ( P > 0.05). There were no other significant differences between MPH-treated and control sides in any other variables measured.

CONCLUSION: The use of MPH after ESS results in significantly less bleeding in the early postoperative period with no increase in pain, obstruction, or nasal discharge. Patients treated with MPH follow a normal postoperative recovery otherwise.