The blood supply of the inferior nasal concha (turbinate): a cadaveric anatomical study.

The blood supply of the lateral nasal wall acquires a great deal of interest for many reasons especially for the treatment of clinical conditions such as epistaxis that sometimes needs surgical interventions and endoscopic sinus and skull base surgeries that requires a good choice of endonasal flaps including inferior nasal concha (commonly named as inferior turbinate by clinicians) flap to close the dural defects. Successful treatment of epistaxis and closure of such defects depends on detailed anatomical knowledge of lateral nasal wall vasculature and a vital flap with good blood supply, respectively. Because of these we aimed to study the blood supply of inferior turbinate, regarding the sources and courses of the blood vessels. Forty formalin-fixed hemisected cadaveric heads were used at Hacettepe University Anatomy Dissection Laboratory. Anatomical dissection of the inferior nasal concha and the lateral nasal wall was done by dissecting microscope. Coloring dye injection to the arteries was performed. After a detailed examination of the lateral nasal wall; the position of the sphenopalatine foramen (SPF) and the sphenopalatine artery (SPA) were identified. The posterior lateral nasal artery (PLNA) found to give middle and inferior conchal (turbinate) arteries. The average length of the inferior turbinate artery (ITA) was 9.057 ± 1.674 mm, the diameter was 1.452 ± 0.172 mm, the distance from posterior end of inferior turbinate was 7.879 ± 1.52 mm. Anastomosis in the lateral nasal wall between the ITA and the anterior ethmoidal and the lateral nasal (branch of the facial artery) arteries were established. The blood supply of inferior nasal concha is mainly provided by ITA and its anastomotic contributors. Detailed knowledge related to it, before surgical interventions, may reduce intraoperative bleeding and increase endoscopic exposure.

Radiological Assessment of the Anatomy of Frontal Recess Cells and the Anterior Ethmoidal Artery.

It is necessary for the surgeon to be familiar with frontal recess anatomy during an endoscopic approach to the frontal sinuses. The aim of this study was to evaluate the prevalence of frontal recess cells in Japanese adults as well as the association between the frontal recess and the location of the anterior ethmoidal artery (AEA). The frontal recess cells and the AEAs were retrospectively evaluated in CT scans of the nasal and paranasal sinuses for 89 patients. The prevalence of agger nasi cells was 90.7%. The frequency of frontal cell types 1, 2, 3 and 4 was 28.8, 0.6, 2.6 and 0%, respectively. Suprabullar cells (SBCs) and frontal bullar cells (FBCs) were identified in 78/96 sides (81.3%) and 24/96 sides (24%), respectively. The prevalence of the medial group of frontal recess cells (interfrontal sinus septal cells) was 12.4%. In 42/61 sides (68.9%), the AEAs were located within the posterior margin of the SBCs or the FBCs. Therefore, SBCs, FBCs and the vertical portion of the middle turbinate are reliable landmarks for the identification of AEAs.

The posterior pedicled inferior turbinate-nasoseptal flap: a potential combined flap for skull base reconstruction.

OBJECTIVES: To develop a combined pedicled flap comprising the mucoperiosteum and mucoperichondrium of the inferior turbinate, lateral nasal wall, nasal floor, and nasal septum based on the posterior lateral nasal artery, a branch of the sphenopalatine artery, for the reconstruction of skull base defects resulting from endoscopic expanded endonasal approaches. METHODS: Eleven fresh adult cadaver heads were dissected. Arterial distribution patterns of the inferior turbinate, lateral nasal wall, nasal floor, and nasal septum were investigated. The posterior pedicled inferior turbinate-nasoseptal flap was designed, measured, and harvested, and its ability to cover ventral skull base defects was examined. RESULTS: The inferior turbinate artery and/or posterior lateral nasal artery had 3.19 ± 1.47 (range 2-7) branches [mean outer diameter of largest branch, 0.40 ± 0.10 (range 0.24-0.60) mm] that anastomosed with the nasoseptal artery. These anastomosing arteries allowed the posterior lateral nasal artery to supply arterial blood to the nasoseptal mucoperichondrium and mucoperiosteum. Mean flap length was 100.65 ± 5.61 (range 91.43-109.44) mm, and minimum and maximum widths were 25.21 ± 2.29 (range 22.36-30.23) and 44.53 ± 5.02 (range 36.45-54.10) mm, respectively. Mean flap area was 3090.69 ± 288.08 (range 2612.97-3880.09) mm(2). The flap covered defects extending from the frontal sinus to the foramen magnum in all specimens. CONCLUSIONS: Harvesting of a posterior pedicled inferior turbinate-nasoseptal flap is feasible. It should be considered a useful option for the reconstruction of large defects involving the anterior skull base, planum sphenoidale, sella turcica, and/or clivus.

Model demonstrates functional purpose of the nasal cycle.

BACKGROUND: Despite the occurrence of the nasal cycle being well documented, the functional purpose of this phenomenon is not well understood. This investigation seeks to better understand the physiological objective of the nasal cycle in terms of airway health through the use of a computational nasal air-conditioning model. METHOD: A new state-variable heat and water mass transfer model is developed to predict airway surface liquid (ASL) hydration status within each nasal airway. Nasal geometry, based on in-vivo magnetic resonance imaging (MRI) data is used to apportion inter-nasal air flow. RESULTS: The results demonstrate that the airway conducting the majority of the airflow also experiences a degree of ASL dehydration, as a consequence of undertaking the bulk of the heat and water mass transfer duties. In contrast, the reduced air conditioning demand within the other airway allows its ASL layer to remain sufficiently hydrated so as to support continuous mucociliary clearance. CONCLUSIONS: It is quantitatively demonstrated in this work how the nasal cycle enables the upper airway to accommodate the contrasting roles of air conditioning and the removal of entrapped contaminants through fluctuation in airflow partitioning between each airway.

Septal perforation and bilateral partial middle turbinate necrosis after bilateral sphenopalatine artery ligation.

OBJECTIVE: To report previously unreported complications of bilateral sphenopalatine artery ligation. SUBJECTS AND METHODS: We present the case of a 45-year-old man who underwent bilateral sphenopalatine artery ligation to control intractable posterior epistaxis. After four months, he re-presented with nasal obstruction and crusting. RESULTS AND ANALYSIS: Examination under general anaesthesia showed posterior septal perforation and bilateral necrosis of the lower parts of the middle turbinates. The necrotic parts were excised. The patient had no more complaints. CONCLUSION: Following sphenopalatine artery occlusion, ischaemic necrosis is a potential risk in anatomical areas that receive their only arterial supply from this artery. The staging of bilateral sphenopalatine artery occlusion needs to be studied.

Why Rudolph's nose is red: observational study.

OBJECTIVE: To characterise the functional morphology of the nasal microcirculation in humans in comparison with reindeer as a means of testing the hypothesis that the luminous red nose of Rudolph, one of the most well known reindeer pulling Santa Claus's sleigh, is due to the presence of a highly dense and rich nasal microcirculation. DESIGN: Observational study. SETTING: Tromsø, Norway (near the North Pole), and Amsterdam, the Netherlands. PARTICIPANTS: Five healthy human volunteers, two adult reindeer, and a patient with grade 3 nasal polyposis. MAIN OUTCOME MEASURES: Architecture of the microvasculature of the nasal septal mucosa and head of the inferior turbinates, kinetics of red blood cells, and real time reactivity of the microcirculation to topical medicines. RESULTS: Similarities between human and reindeer nasal microcirculation were uncovered. Hairpin-like capillaries in the reindeers' nasal septal mucosa were rich in red blood cells, with a perfused vessel density of 20 (SD 0.7) mm/mm(2). Scattered crypt or gland-like structures surrounded by capillaries containing flowing red blood cells were found in human and reindeer noses. In a healthy volunteer, nasal microvascular reactivity was demonstrated by the application of a local anaesthetic with vasoconstrictor activity, which resulted in direct cessation of capillary blood flow. Abnormal microvasculature was observed in the patient with nasal polyposis. CONCLUSIONS: The nasal microcirculation of reindeer is richly vascularised, with a vascular density 25% higher than that in humans. These results highlight the intrinsic physiological properties of Rudolph's legendary luminous red nose, which help to protect it from freezing during sleigh rides and to regulate the temperature of the reindeer's brain, factors essential for flying reindeer pulling Santa Claus's sleigh under extreme temperatures.

The sphenopalatine artery: a surgical challenge in epistaxis.

UNLABELLED: Knowledge on the anatomy of the sphenopalatine artery (SPA) and its branches is fundamental for the success of the endoscopic treatment of posterior epistaxis. However, the complex anatomical variations seen in the irrigation of the nasal cavity poses a significant surgical challenge. OBJECTIVE: This paper aims to describe the endoscopic anatomy of the SPA in human cadavers. MATERIALS AND METHODS: This is a contemporary cross-sectional cohort study carried out between April 2010 and August 2011. The presence of the ethmoidal crest on the lamina perpendicular to the palatine bone and the location of the principal sphenopalatine foramen (PSF) and the accessory sphenopalatine foramen (ASF) were analyzed in 28 cadavers, and the branches emerging from the foramens were counted. RESULTS: Fifty-six nasal fossae were analyzed. The ethmoidal crest was present in 96% of the cases and was located anteriorly to the PSF in most cases. The PSF was located in the transition area between the middle and the superior meatus in all cases. The ASF was seen in 12 cases. Most nasal fossae (n = 12) presented a single bilateral arterial trunk emerging from the PSF. In other cases, three (n = 8) or two (n = 5) arterial trunks emerged bilaterally from the PSF. In most cases, the SPA emerged as a single trunk from the ASP. CONCLUSIONS: The anatomy of the SPA is highly variable. The success of the treatment for severe epistaxis relies heavily on adequate knowledge of the possible anatomical variations of the sphenopalatine artery.

Artéria esfenopalatina: desafio cirúrgico na epistaxe / The sphenopalatine artery: a surgical challenge in epistaxis

O conhecimento anatomocirúrgico da artéria esfenopalatina (AEP) e de seus ramos é de fundamental importância para o sucesso no tratamento endoscópico da epistaxe posterior. Contudo, essa complexa variação anatômica da irrigação da cavidade nasal ainda é um desafio cirúrgico. OBJETIVO: Descrever a anatomia endoscópica da AEP em cadáveres humanos. CASUÍSTICA E MÉTODOS: Estudo de coorte histórica com corte transversal de abril de 2010 a agosto de 2011. Foi descrita a presença da crista etmoidal da lâmina perpendicular do osso palatino, a localização do forame esfenopalatino principal (FEP) e acessório (FEA) e quantificados os ramos que emergem dos forames. RESULTADOS: Foram analisadas 56 fossas nasais. A crista etmoidal estava presente em 96% dos casos e na maioria das vezes anterior ao FEP. O FEP se localizava na transição do meato médio para o meato superior em todos os casos. O FEA estava presente em 12 casos. Foi mais prevalente a presença de um único tronco arterial bilateral na emergência do FEP (43%). Em outros casos, observaram-se três (n = 8) e dois (n = 5) troncos arteriais, emergindo do FEP bilateralmente. Observou-se que na maioria dos casos um único tronco se emergia do FEA. CONCLUSÕES: A anatomia da artéria esfenopalatina é bastante variável. O conhecimento das possíveis variações anatômicas implica no sucesso do tratamento da epistaxe grave.

Knowledge on the anatomy of the sphenopalatine artery (SPA) and its branches is fundamental for the success of the endoscopic treatment of posterior epistaxis. However, the complex anatomical variations seen in the irrigation of the nasal cavity poses a significant surgical challenge. OBJECTIVE: This paper aims to describe the endoscopic anatomy of the SPA in human cadavers. MATERIALS AND METHODS: This is a contemporary cross-sectional cohort study carried out between April 2010 and August 2011. The presence of the ethmoidal crest on the lamina perpendicular to the palatine bone and the location of the principal sphenopalatine foramen (PSF) and the accessory sphenopalatine foramen (ASF) were analyzed in 28 cadavers, and the branches emerging from the foramens were counted. RESULTS: Fifty-six nasal fossae were analyzed. The ethmoidal crest was present in 96% of the cases and was located anteriorly to the PSF in most cases. The PSF was located in the transition area between the middle and the superior meatus in all cases. The ASF was seen in 12 cases. Most nasal fossae (n = 12) presented a single bilateral arterial trunk emerging from the PSF. In other cases, three (n = 8) or two (n = 5) arterial trunks emerged bilaterally from the PSF. In most cases, the SPA emerged as a single trunk from the ASP. CONCLUSIONS: The anatomy of the SPA is highly variable. The success of the treatment for severe epistaxis relies heavily on adequate knowledge of the possible anatomical variations of the sphenopalatine artery.

Surgical management of nasal obstruction.

The proper evaluation of the patient with nasal obstruction relies on a comprehensive history and physical examination. Once the site of obstruction is accurately identified, the patient may benefit from a trial of medical management. At times however, the definitive treatment of nasal obstruction relies on surgical management. Recognizing the nasal septum, nasal valve, and turbinates as possible sites of obstruction and addressing them accordingly can dramatically improve a patient's nasal breathing. Conservative resection of septal cartilage, submucous reduction of the inferior turbinate, and structural grafting of the nasal valve when appropriate will provide the optimal improvement in nasal airflow and allow for the most stable results.

Anteriorly based inferior turbinate flap for endoscopic skull base reconstruction.

OBJECTIVE: In the absence of the nasal septal flap, there is limited ability to reconstruct the anterior skull base because of the paucity of alternative intranasal vascularized flaps. In this article, the authors describe the anteriorly pedicled inferior turbinate flap (AITF) as a method for endoscopic reconstruction of anterior skull base defects. STUDY DESIGN: A case series with chart review of the demographic, clinical, surgical, and early follow-up data of patients who underwent endoscopic reconstruction of skull base defects by the AITF. SETTING: An academic cancer center. METHODS: The nature of the arterial blood supply of the inferior turbinate from the anterior ethmoidal artery was exploited to design an anteriorly pedicled flap. Flap survival, adequacy of the seal, and rate of complications were assessed. RESULTS: Seven patients were suitable to undergo anterior skull base reconstruction using the AITF with or without combinations with other flaps. Each had a high-flow intraoperative cerebrospinal fluid (CSF) leak. The reconstruction achieved covering of the anterior skull base, including the frontal sinus and cribriform plate, with no postoperative CSF leaks or any other complications. CONCLUSION: The AITF is well tolerated and is associated with good outcomes. Its length and angle of rotation allow reconstruction of skull base defects in the posterior frontal sinus wall and cribriform plate, especially when traditional reconstruction techniques are not possible.

The clinical value of the novel cauterization procedure for the inferior turbinate artery during turbinate surgery.

The objective of the study was to evaluate the efficacy and the safety of the novel cauterization procedure of the inferior turbinate artery, which may be performed with any kind of inferior turbinate procedures in reducing the intra and the post-operative bleeding in partial inferior turbinectomy. A prospective controlled study was conducted in a referral center. Sixty patients (38M, 22F) who underwent partial turbinectomy were included. In 20 patients, partial turbinectomy was performed with the cauterization in one nasal cavity and the other one without it. The remaining 40 patients were divided into two groups which comprised cauterization positive and negative patients and are assessed in terms of post-operative bleeding. The area of the cauterization was 1 cm(2) field which is 1 cm anterior to the posterior attachment of the inferior turbinate on the lateral nasal wall, very close to the inferior turbinate, where the pulsating vessel is most commonly seen. Mean operation time, mean intra-operative blood loss and post-operative bleeding incidence are the main outcome measures. Post-operative bleeding was seen in three patients (15%) in the cauterization negative group. No patient had post-operative bleeding in the cauterization positive group. Mean operation time and mean intra-operative bleeding amount were significantly lower in the cauterization positive side. Cauterization of the inferior turbinate artery on the lateral nasal wall is a safe and effective method which may also be performed with any kind of inferior turbinate procedures to reduce both the operation time and intra and post-operative bleeding.

Middle turbinate vascularized flap for skull base reconstruction after an expanded endonasal approach.

INTRODUCTION: The expanded endonasal approaches to the skull base are modular approaches that arise from the sphenoidal sinus. The reconstructive techniques in these approaches are key to avoid postoperative complications. Available flaps for reconstruction include the pedicled nasoseptal flap, the transpterygoid temporoparietal fascia flap, and the posterior pedicle inferior turbinate flap (PPITF), among others. Recently, the middle turbinate flap has been described in a cadaveric study. We report our preliminary experience in the use of this middle turbinate vascularized flap for skull base reconstruction after expanded endonasal approaches. MATERIAL AND METHODS: Ten patients underwent reconstructive procedures with the mucoperiostial vascularized middle turbinate flap. Capability to cover the defect, closure success, operative time and complications related to the procedure are retrospectively analyzed. RESULTS: A satisfactory closure was obtained in all procedures, and there were no complications related to the technique. Required operative time was similar to the time employed for the nasoseptal flap. CONCLUSIONS: The vascularized middle turbinate flap is a reliable reconstructive technique for the reconstruction of moderate-sized skull base defects. It can be considered either as the first choice of closure or as an alternative to the nasoseptal flap when this is not available. Different flap combinations may facilitate skull base defect reconstruction.

Rhinitis medicamentosa as a cause of increased intraoperative bleeding.

Rhinitis medicamentosa occurs with repeated and prolonged use of topical decongestants. The resultant reduced ability to respond to decongestants mediated via enlarged capillary endothelial gaps can lead to profuse bleeding during turbinate surgery. We recommend that patients with rhinitis medicamentosa be weaned off topical decongestants prior to elective turbinate surgery to minimize this complication. The management of rhinitis medicamentosa and a case of intraoperative hemorrhage are presented.

Blood supply of the inferior turbinate and its clinical applications.

One of the most effective treatments of inferior turbinate (IT) hypertrophy is surgical reduction. Bleeding from the IT branch of the posterior lateral nasal artery (ITB) may interfere with the outcome of IT surgery. The aim of this study is to define the anatomic localization of the ITB and its variations and to investigate its clinical importance. Anatomic relations of the ITB were determined by microdissecting 20 adult, sagittally cross-sectioned head specimens. Branching characteristics of the ITB and its anatomical relations were evaluated. The most consistent two markers to define the ITB on the lateral nasal wall were the posterior attachment of the IT (PAIT) and the posterior attachment of the middle turbinate (PAMT). Mean horizontal distances of the ITB from the PAIT and the PAMT were 7.2 mm ± 2.8 mm (2.5-11.8 mm) and 8.2 mm ± 2.8 mm (4-14.6 mm), respectively. ITB was the only major artery that supplied the IT in 85% of the specimens, and, in 15%, there was more than one artery. ITB was located lateral to the IT in 95% and medial to the IT in 5%. The ITB coursed on the lateral nasal wall, vertically between the middle and ITs and always anterior to the PAIT. All the variations of blood supply to the IT were within a one square centimeter area, ∼1-cm anterior to the PAIT. Successful cauterization of this particular area may be an alternative cauterization site in IT surgery.

Inferior nasal turbinate wound healing after submucosal radiofrequency tissue ablation and monopolar electrocautery: histologic study in a sheep model.

OBJECTIVES/HYPOTHESIS: To study differences in inferior nasal turbinate (INT) mucosal and submucosal wound-healing histology after radiofrequency tissue ablation (RTA) and monopolar electrocautery (MEC). STUDY DESIGN: Randomized controlled trial. METHODS: Experimental study in sheep. Using hematoxylin- and eosin-stained sections, stromal fibrosis, submucosal interstitial space volume (ISV), mucosal epithelial cell necrosis, submucosal inflammation, and vascularization in inferior turbinate samples were compared after RTA and MEC. Twelve turbinate samples were studied for each technique after 1, 3, and 8 weeks postoperatively (four samples at each time point) and there were five samples of controls. A 4-point semiquantitative histologic grading scale (0 = absence, 1 = mild, 2 = medium, 3 = pronounced) was used to assess changes. Comparisons were performed using the Mann-Whitney test and the Kruskal-Wallis one-way analysis of variance (ANOVA). RESULTS: At postoperative week 8, the RTA group had more extensive fibrosis (P = .061) and ISV reduction (P = .127), less epithelial cell necrosis (P = .131), and significantly less submucosal inflammation (P = .036) and vascularization (P = .011) compared with the MEC group. Epithelial cell necrosis and submucosal inflammation at week 8 did not differ significantly between RTA and control group (P = 1.000 and P = .356, respectively). A significant decrease in submucosal layer vascularization in RTA-treated INTs has been observed (P = .003 compared with controls). CONCLUSIONS: RTA is more effective (although not significantly) and less invasive than MEC for INT volume reduction. Tissue damage and wound healing were dominated by inflammation and associated epithelial cell necrosis in MEC and by a disturbance in the INT submucosal microcirculation in RTA in the studied sheep model.

Ultrasound submucosal inferior nasal turbinate reduction technique: histological study of wound healing in a sheep model.

AIM OF THE STUDY: To describe histological changes after application of an ultrasound tissue reduction (UTR) technique in a newly introduced sheep model to study inferior nasal turbinate mucosal wound healing. MATERIALS AND METHODS: An experimental study in a sheep model. Stromal fibrosis, submucosal interstitial space volume (ISV), mucosal epithelial cell necrosis, mucosal inflammation and blood vessels' engorgement in inferior turbinate samples were assessed after application of UTR using hematoxylin/eosin staining in 12 turbinate samples after different time points. Histological grading was performed using a 4-point scale RESULTS: After one week, extensive development of fibrosis (p = 0.006) and significant reduced stromal ISV (p < 0.001) compared to controls were observed. The degree of fibrosis and the stromal ISV remained constant during the 8-week period. The extensive epithelial cell necrosis observed at week 1, diminished later, so that at 8 weeks no significant difference with controls in the necrosis extent was noted. Significant reduction of engorgement of blood vessels in the submucosal layer was noted after 8 weeks (p = 0.008, compared with baseline). Mucosal inflammation, while pronounced at week 1 (p = 0.005, compared with baseline), was normalized at week 8. CONCLUSION: Due to the rapid induction of extensive fibrosis, to the limited inflammation reaction, to the moderate degree of epithelial necrosis, to the reduction of subepithelial ISV and the persistence of these features till week 8 at least, UTR emerges as an effective minimally invasive technique for inferior nasal turbinate volume reduction.

A study of the maxillary and sphenopalatine arteries in the pterygopalatine fossa and at the sphenopalatine foramen.

OBJECTIVES: Arterial ligation remains a key option in the treatment of persistent epistaxis and clarification of the arterial configuration of the distal maxillary/sphenopalatine artery is important for understanding the rationale behind current surgical treatments. Greater understanding of the arterial anatomy will reduce the risk of technical failures and improve the reliability of surgical interventions for persistent epistaxis and will also be useful for surgeries involving the pterygopalatine fossa. STUDY DESIGN: Anatomical study in cadavers. METHODS: This is an anatomical study of 128 cadaveric tissue blocks containing the pterygopalatine fossa. In total, 118 tissue blocks were microdissected using a Watson-Barnet dissecting microscope. Ten injected tissue blocks were cleared by the Spalteholz technique. Photographic records were made. RESULTS: Analysis demonstrated three common configurations of the maxillary artery in the pterygopalatine fossa: a single looped form (18%) and two double-looped forms, 'E' (51%) and 'M' (31%). The maxillary artery bifurcates before the sphenopalatine foramen in 105 cases (89%). The sphenopalatine foramen lies at the posterior end of the middle turbinate; in 58% of cases it lies in both the superior and middle meati. Asymmetry in the size of the maxillary arteries was uncommon; only 3% could be described as 'dominant'. CONCLUSIONS: The arterial configuration of the maxillary artery in the pterygopalatine fossa can be complex but may be classified into one of three forms. Some configurations may be more liable to lead to difficulties with branch identification during surgical treatment of epistaxis particularly in combination with an inadequate osteotomy. Clinicians should expect to find more than one vessel exiting the sphenopalatine foramen and actively search for these during surgery. Asymmetry in the maxillary/sphenopalatine arteries is not common and contralateral ligations are not indicated.

[The influence of different methods of surgical intervention on mucosal microcirculation in the inferior turbinate bone evaluated by laser Doppler flowmetry].

Thirty patients with enlarged inferior turbinate bones were allocated to 3 subgroups depending on the choice of surgical treatment. The control group comprised 10 practically healthy volunteers with unaffected nasal and paranasal cavities. The objective of the study was to compare clinical efficiency of three surgical techniques, viz. submucosal vasotomy, submucosal endoscopic conchotomy, and submucosal osteoconchotomy. Mucosal microcirculation in the nasal cavity was studied by laser Doppler flowmetry in the middle part of the inferior turbinate bone. In all the cases, measurements were performed before and after the adrenaline test; patients of the study group underwent additional measurements on day 7 and 3 months postoperatively. The results of the study confirmed the development of microcirculatory disturbances in patients with enlarged inferior turbinate bones. It is concluded that all the three surgical modalities employed in this study for the correction of enlarged inferior turbinate bone preserve functional capacity of intranasal mucosa and promote normalization of its microhemodynamic patterns. Submucosal endoscopic conchotomy appears to be the most efficacious of the three techniques.

Old and new aspects of middle turbinate histopathology.

OBJECTIVE: To study the histology of the normal and pathologic middle turbinate (MT). STUDY DESIGN: Nonrandomized, controlled study. SUBJECTS AND METHODS: Qualitative and quantitative assessment of soft tissue and bony elements of 14 normal and 10 chronic rhinosinusitis (CRS) MT samples (patients' mean CT score, 6.5 +/- 6.7). A comparison with 14 normal inferior turbinate (IT) samples was accomplished. Quantitative assessment was limited to the lateral mucosal layer (LML). RESULTS: The thickness of the LML was significantly greater in pathologic MT than in normal MT (P = 0.002). Except for veins that underwent significant increase (P = 0.036), other soft tissue constituents of the pathologic MT did not change significantly. Glands were more abundant in normal MT and veins in normal IT (P < 0.001, P = 0.001, respectively). Qualitative assessment showed larger veins in the normal IT compared with the normal MT. Inflammatory cell infiltrate, edema, and fibrosis were found in CRS. None of our MT bones exhibited osteomyelitic changes. CONCLUSIONS: The different proportion of glands suggests varied functional roles for both the MT and IT. The significant involvement of the MT in the inflammatory process of CRS and the relatively small size and paucity of veins with relatively little effect on nasal airflow justify partial excision of the MT.