What Are the Clinical Features and Complications of Rhinosinusitis?
Chronic rhinosinusitis is one of the major inflammatory diseases of the head, particularly of the paranasal sinuses (air-filled spaces around the nasal cavity), and is known to occur in approximately one percent to five percent of the United States population, as per current research statistics. This condition causes nasal, oral, and facial discomfort with reported cardinal symptoms such as facial pain or pressure, hyposmia (reduced ability to smell) or anosmia (complete loss of the sense of smell), nasal drainage, nasal obstruction, etc. Usually, patients affected report at least one or two of these four major signs that can be indicative of the disease and when left untreated, it can not only continue to impair the quality of the affected individual's life but also cause several complications like abnormal tissue changes that can cause patient morbidity.
In chronic rhinosinusitis, patients often complain of soft tissue or nasal mucosal edema (an inflammatory condition) that is most often a result of environmental triggers. Furthermore, the patients experience clinical symptoms of sinus ostial obstruction (blockage of the opening (ostium) of the sinuses, which can impair drainage and may also have retention of secretions, which is a bodily response to bacterial or viral proliferation. In severe cases of chronic rhinosinusitis that have been left untreated, the long-term response to inflammation can induce the sinus lining epithelium to eventually transform into an abnormal or metaplastic tissue type, with the sinus undergoing ciliary dysfunction (a condition where the tiny, hair-like structures on cell surfaces, known as cilia, fail to function properly) eventually. Untreated cases of chronic rhinosinusitis can further worsen the condition, giving the patient severe orofacial discomfort and leading to complications.
What Hypotheses Explain the Development of Rhinosinusitis?
One of the popular hypotheses that has been suggested by oral pathologists as well as medical researchers implicated in the development of chronic rhinosinusitis is that it may develop because of certain environmental factors or allergens that act as triggers for the individual. This can vary from infectious agents, whether viruses, bacteria or fungi, air pollutants, etc. These environmental triggers or allergens may be capable of stimulating the epithelium (the layer of cells lining the sinuses) and subsequently causing localized inflammation of the sinus mucosal layers or tissues. The normal physiological functions of the facial sinuses in the body are quite dependent, according to medical researchers, on the patency of the osteomeatal unit (a key area in the nasal cavity where the sinuses drain). The functions of the facial sinuses of the head are also dependent further on the mucociliary transport and the normal quantity as well as quality of the secretions that tend to vary physiologically.
What Are the Options for Medical or Surgical Management of Chronic Rhinosinusitis?
While medical therapy is the primary goal of any treatment modality for patients with chronic rhinosinusitis, the treatments considered are either antibiotic drugs or topical nasal steroids as suggested by the oral surgeon or the otolaryngologist.
An oral and maxillofacial surgeon or otolaryngologist may recommend either balloon sinuplasty (a minimally invasive procedure that uses a balloon catheter to widen the sinus passages and improve drainage) or functional endoscopic sinus surgery (a surgical technique that uses an endoscope to directly access and remove obstructions or infection from the sinus cavities, aiming to restore normal sinus function) as the main surgical option in the management of chronic rhinosinusitis. Further, with the advent of technical advances by surgeons in modern endoscopic systems, there has been a recognition of the importance given to the mucociliary flow and ventilation status for the patient, which is promoted through the anatomical ostia (natural openings in the sinus cavities that allow for normal sinus drainage and function). The newer option of FEDS (functional endoscopic dilatation of sinuses) has also been a popular choice among surgeons currently.
1. Functional Endoscopic Sinus Surgery: Functional endoscopic sinus surgery (FESS) is one of the gold-standard treatments for the management of chronic rhinosinusitis. This procedure includes a set of minimally invasive techniques in which the sinus air cells and the ostia are opened by the operator or surgeon through techniques that employ direct visualization of the sinus. The goal of this procedure ultimately is to restore both sinus ventilation and its normal functions, which are otherwise severely disrupted in this condition.
Though every procedure has its own fair share of relative risks and debate, the FESS procedure remains one of the most opted gold standard surgical procedures in the treatment of rhinosinusitis patients and also further is said to have a very low complication rate. Because of the post-operative reduced risk and the ability of the surgery to restore normal mucociliary functions in affected patients, this can be called the modern-day procedure of choice for many oral surgeons and otolaryngologists.
2. Balloon Sinuplasty: This is deemed to be one of the traditional but minimally invasive techniques employed for managing not only chronic but also recurrent bouts of sinusitis or sinus infections in affected patients. This procedure is indicated often when medical therapy is not able to provide adequate or symptomatic relief to the patient. During this procedure, surgeons utilize a small balloon that is placed through the nose for dilatation of the sinus openings. However, the major drawbacks that exist to this procedure are that not every chronic rhinosinusitis patient is deemed fit for undergoing this, for instance, younger children. Mild nasal discomfort or nasal congestion can be common complaints for those who undergo this procedure.
3. Functional Endoscopic Dilatation of Sinuses (FEDS): The new age technique further that is similar but employs a slightly different method from the FESS technique is the functional endoscopic dilatation of the sinuses (FEDS). This procedure involves the rationale of sinus ostial balloon dilatation and focuses on specifically restoring the patency of sinuses without eliminating or removing any tissue. These are more conservative surgical therapies in comparison to FESS procedures and have a low risk of postoperative complications, thereby rapidly decreasing patient morbidity. Many cadaver studies are currently confirming the excellent potential use of this procedure in treating rhinosinusitis and also as an alternative conservative therapy in fact to FESS. Clinical trials in the USA have demonstrated the method of FEDS to be both safe and effective in the selected patients of rhinosinusitis on which this procedure has been performed.
The new age technique of FEDS is slowly gaining popularity in the surgical field for effectively relieving not only the sinus ostial obstruction but also the main symptom in these patients. The added advantages are that there is reduced postoperative pain, scarring, or tissue bleeding that is typically seen or associated with traditional instruments or procedures like Balloon sinuplasty or ethmoidectomy surgeries.
Conclusion:
New-age surgical techniques like FEDS are being considered and implemented with the advent of modern surgical instruments over the gold standard of FESS or the minimally invasive balloon sinuplasty procedure for treating chronic rhinosinusitis patients. The oral maxillofacial surgeon or the otolaryngologist needs to recognize and treat the symptoms of the affected patients on time to prevent postoperative complications such as nasal congestion, secretions, or oral and nasal discomfort.
