Detection of R-wave in Fetal EGG Based on Wavelet Transform and Matched Filtering / 中国医疗器械杂志

By analyzing the characteristics of maternal abdominal ECG (Electrocardiogram), a method based on wavelet transform and matched filtering is proposed to detect the R-wave in fetal EGG (FECG). In this method, the high-frequency coefficients are calculated by using wavelet transform. First, the maternal QRS template is obtained by using the arithmetic mean scheme. Finally, the R-wave of FECG is detected based on matched filtering. The experimental results show that this method can effectively eliminate the noises, such as the maternal ECG signal and baseline drift, enhancing the accuracy of the detection of fetal ECG.

Influence of aluminum hydroxide adjuvant on a murine model of allergic rhinitis / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To investigate the influence of aluminum hydroxide adjuvant on a murine model of allergic rhinitis (AR) and to confirm an appropriate method of establishing a mouse model of AR.@*METHOD@#Establishing two types of BALB/c mice models of AR, one was identified as Local group which was characterized through intranasal sensitization and challenge using ovalbumin (OVA), and the other Systemic group which was made by intraperitoneal sensitization with OVA plus aluminum hydroxide and intranasal challenge through OVA. Then the numbers of sneezing and nasal rubbing were counted after the last challenge and the eosinophils in the nasal mucosa of mice models were observed and counted though Luna stain. Furthermore, morphological hyperplasia was examined in intraepithelial goblet cells and submucosal glands with HE stain. In addition, interlukin (IL) -4, IL-5, OVA specific IgE (sIgE) and interferon (IFN)-gamma in nasal lavage fluid (NLF) and serum of mice were examined u sing enzyme linked immunosorbent assay (ELISA).@*RESULT@#The counts of sneezing and nasal rubbing in local group were more than those in systemic group and eosinophilia in the nasal mucosa of former group was greater than that in the latter one. Morphological hyperplasia was stronger in intraepithelial goblet cells and submucosal glands in local group compared with that in systemic group. Furthermore, the contents of IL-4, IL-5 and sIgE increased in the NLF and serum of mice of local group compared to those of systemic one. However, the production of IFN-gamma of mice in local group decreased when compared with that in Systemic group.@*CONCLUSION@#OVA plus aluminum hydroxide adjuvant may promote Th1 type immune response as well as Th2 response. OVA intranasal sensitization and challenge locally is an appropriate way in the establishment of AR mice models.

Treatment of allergic rhinitis with normal saline nasal irrigation at different temperature / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To investigate the influence of normal saline nasal irrigation with different temperature on allergic rhinitis (AR) and to confirm the appropriate temperature of nasal irrigation.</p><p><b>METHODS</b>Sixty patients with AR were randomly divided into 3 groups (according to random number table) and received 15 °C, 25 °C or 40 °C normal saline nasal irrigation respectively, and 20 healthy controls received no treatment. Visual analogue scale ( VAS) was used to assess the symptoms among the control group and the various intervention groups and the enzyme linked immunosorbent assay (ELISA) was applied to detect the contents of histamine, leukotriene C4 (LTC4), house dust mite D1 specific IGE (sIGE) and eosinophil cationic protein (ECP) among the control group and the various intervention groups. GraphPad Prism 5 software was used to analyze the data.</p><p><b>RESULTS</b>There was no statistical difference between 15 °C normal saline nasal irrigation group and 25 °C normal saline nasal irrigation group. Pre-intervention and post intervention whether is VAS scores of rhinorrhea, sneezing, nasal obstruction and nasal pruritis or in contents of histamine, LTC4, sIgE and ECP showed no difference (all P > 0.05). However, the symptoms of (sneezing VAS score: 3.765 ± 0.291; nasal obstruction VAS score: 3.529 ± 0.365). The difference was significant (t = 4.678, P < 0.001; t = 3.901, P < 0.01). The contents of histamine [ (21.78 ± 0.62) ng/ml] and LTC4 (17.43 ± 0.67 ng/ml) were also decreased after intervention of 40 °C normal saline nasal irrigation [ histamine content: (18.82 ± 0.52) ng/ml; LTC4 content: (13.14 ± 0.59) ng/ml ]. The difference was significant (t = 3.632, P < 0.01; t = 4.79, P < 0.001). Nonetheless, there were no statistical differences in VAS scores of rhinorrhea (t = 2.02, P = 0.051) and nasal pruritis (t = 1.984, P =0.056) and in contents of sIgE (t = 1.891, P = 0.066) and ECP (t = 2.021, P = 0.05). There were statistical differences between the 40 °C group and the 25 °C group normal saline nasal irrigation group in symptoms of sneezing (t = 2.060, P = 0.048) and nasal obstruction (t = 2.1053, P = 0.048). and inflammatory factors of histamine (t = 2.078, P = 0.045) and LTC4 (t = 2.149, P = 0.038). In symptoms of rhinorrhea and nasal pruritis and local production of sIgE and ECP, there was no statistical difference (all P > 0.05).</p><p><b>CONCLUSION</b>40 °C normal saline nasal irrigation can improve the symptoms of sneezing and nasal obstruction and can alleviate the local levels of inflammatory factors like histamine and LTC4 in AR patients, and is the appropriate irrigation temperature.</p>

Clinicopathological characteristics of hypopharyngeal carcinosarcoma / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To study the clinicopathological characteristics, diagnosis and differential diagnosis of hypopharyngeal carcinosarcoma.@*METHOD@#Clinical data of one case with hypopharyngeal carcinosarcoma proved by pathology were analyzed retrospectively. The related literatures were reviewed.@*RESULT@#The masses were surgically removed,and the postoperative diagnosis was confirmed to be carcinosarcoma by histopathological examination. After radiotherapy and chemotherapy, the patient recovered well postoperatively without recurrence during 18-month follow-up.@*CONCLUSION@#Carcinosarcoma of the hypopharynx is an extremely rare malignant tumor with distinctive histological, clinical and immunohistochemical features. The final diagnosis depends on histopathology. This tumor should be differentiated from other tumors such as sarcomatoid carcinoma and the reaction of radiotherapy of carcinoma. Surgery is the proper treatment strategy for carcinosarcoma of the hypopharynx. The patients with locally advanced, postoperative residual tumor or tumor without clear safe surgical margin should undergo radiotherapy, and the postoperative follow up should be in time.

Management of difficult suspension laryngoscopy using a GlideScope® Video Laryngoscope.

CONCLUSIONS: The GlideScope® Video Laryngoscope (GVL) provides a successful method for obtaining adequate visualization of the larynx in patients with difficult laryngeal exposure (DLE). Although the GVL is far from an ideal laryngoscope for laryngeal surgery because of its low image quality and narrow curved operation space, valuable concepts regarding its development can be used for designing a new laryngoscope specifically for otolaryngology. OBJECTIVE: DLE is a problem characterized by poor visualization of the larynx due to a combination of anatomic and clinical conditions. With respect to DLE, no consensus has been reached as to which alternative method should be used when direct laryngoscopy fails. This study focused on the management of DLE cases using the GVL to achieve adequate laryngeal exposure for phonosurgery. METHODS: We used the GVL in conjunction with a set of specially designed endolaryngeal instruments in six cases for which traditional rigid laryngoscopy could not provide visualization of the larynx. RESULTS: Using the GVL, full visualization of the larynx was obtained in all patients with minimal need for excessive internal or external pressure. Manipulations to remove simple lesions or perform a biopsy were carried out successfully. All of the surgeries were completed with excellent visualization and without any major complications.

Clinical analysis of superficial parotidectomy with preservation of the Steven’s duct / 中国耳鼻咽喉头颈外科

OBJECTIVE To evaluate the results of superficial parotidectomy with preservation of the Steven’s duct. METHODS 27 cases of superficial parotidectomy with preservation of the Steven’s duct were reviewed retrospectively. Complications and treatment outcomes were analyzed. RESULTS Almost all cases investigated resulted in satisfactory outcomes. CONCLUSION Superficial parotidectomy with preservation of the Steven’s duct is a possible alternative for some patients, especially those with benign parotid tumour.

Transconjunctival approach to the fractures of the orbital floor and infraorbital rim / 临床耳鼻咽喉头颈外科杂志

Objective:To study the surgical approach to the orbital floor and infraorbital rim.Method:15 cases of fractures of the orbital floor and infraorbital rim were treated with the transconjunctival approach.Result:All fractures of the orbital floor and infraorbital rim were repositioned and fixed through transconjunctival approach. Except for 1 case with mild canthal malposition, no other complication was observed.Conclusion:The transconjunctival approach can provide adequate exposure of the infraorbital rim and orbital floor without scar formation in the face.