Conventional Dissection and Bipolar Electrocauterization Methods of Tonsillectomy: A Comparative Study

Introduction: Tonsillectomy is frequently performed surgical procedure. There are several different methods with varied advantages and disadvantages. In spite of the different techniques available there is no consensus and definite evidence for best method. The most commonly performed are conventional dissection and bipolar electrocauterization methods. Aims: The aim of the study was to compare time required for the completion of surgery, intraoperative and postoperative blood loss along with post operative pain between conventional dissection and bipolar electrocauterization methods. Methods: This comparative study was conducted from August 2019 to March 2021 in total of 30 patients planned for tonsillectomy in department of Otorhinolaryngology, Nepalgunj Medical College Teaching Hospital.In every patient right side tonsillectomy was done with conventional dissection method and left side tonsillectomy was done with bipolar electrocauterization method. Results: The mean age was 27.2±13.08 years. The mean duration of surgery was 16.53 ± 2.43 min and 11.10 ± 1.93 min in conventional dissection method and bipolar electrocauterization method respectively. The difference was statistically significant. Intraoperative blood loss was significantly lower in bipolar electrocauterization method with mean intraoperative blood loss of 19 ±4.62 ml in bipolar electrocauterization group and 81.83 ±36.54 ml in conventional dissection method. The pain intensity was statistically similar in both methods at all-time intervals post operatively. Conclusion: In tonsillectomy, bipolar electrocauterization method has advantage over conventional dissection method in regards to reduced surgical time and intra operative blood loss, without any significant difference in post-operative pain intensity and post-operative hemorrhage.

Angle Trisection, Bhaskara’s Proof, and Pythagorean Theorem

This paper deals with 1) angle trisection, 2) Bhaskara’s first proof, and 3) Pythagorean theorem. The purpose of this paper is threefold. First, to show a new, direct method of trisecting the 900 angle using unmarked straight edge and compass; secondly, to show Bhaskara’s first proof of the Pythagorean theorem (c2 = a2 + b2) as embedded in this new, direct trisection of the 900 angle; lastly, to show the derivation of the Pythagorean theorem from this trisection of the 900 angle. This paper employs the direct dissection method. It concludes by presenting four points: a) the concept of trisectability as distinct from concept of constructability; b) the trisection of the 900 angle as really a new, different method; c) Bhaskara’s first proof of the Pythagorean theorem as truly embedded in this trisection of the 900 angle and; d) another way of deriving Pythagorean theorem from this trisection of the 900 angle.

DYNAMICS OF HORSE INFECTION WITH THE TREMATODE SCHISTOSOMA TURKESTANICUM SKRJABIN, 1913 IN KARAKALPAKSTAN

The dynamics of infection of horses with the trematode Schistosoma turkestanicum Skrjabin, 1913 in Karakalpakstan was studied. We carried out scientific research in various regions of the Republic of Karakalpakstan in 2016–2020. When determining the infection of horses with trematodes in the districts of Karakalpakstan, we used methods of complete and incomplete helminthological dissection by K. I. Skriabin (1928). A total of 143 horses were examined by the complete dissection method. The article presents the results of studies carried out on the territory of the Republic of Karakalpakstan. Helminths were found in all 143 horses examined during the study. The trematode Schistosoma turkestanicum Skrjabin, 1913 was among the identified helminths, which is very common in this region. The parasitic worms Schistosoma turkestanicum were found to belong to the Plathelminthes type, the Trematoda class. The study results indicate that the simultaneous presence of mixed (associative) invasions by trematodes was observed in horses. It was established that trematodes found in horses parasitize on blood vessels of the bile ducts, gallbladder, liver and intestinal mesentery. The prevalence of the trematode Schistosoma turkestanicum in horses was 18.8%, and the intensity of invasion was 3876–12538 specimens. The trematode Schistosoma turkestanicum, depending on the development cycle, develops in the presence of an intermediate host. Freshwater mollusks Lymnaea auricularia, belonging to the family Lymnaeidae perform the function of an intermediate host.

Morphometric study of the segmental branches of the splenic artery in human cadaver spleens by dissection method

Introduction: Spleen is the largest lymphoid organ. It is supplied by splenic artery the largest branch of coeliac trunk. It traverses through the lienorenal ligament to reach near the hilum of the spleen, where it divides into two or three primary branches, each of which is subdivided mostly into two or four secondary branches. Moreover, a superior polar arteries and inferior polar arteries are given from splenic trunk or from one of its primary branches, which goes to the poles of the spleen, without entering the hilum. The present study was undertaken to know about the morphometry of the segmental branches of splenic artery and polar arteries Material and method: The present study was conducted on 79 adult human cadaver spleens by dissection method of unknown sex, fixed in 10% formalin solution, collected from the Department of Anatomy and Forensic Medicine, Mysore Medical College and Research Institute, Mysore. Results: Two primary segmental branches were seen in 56 (70.9%) specimens, three primary segmental branches in 19(24.1%) specimens and four primary segmental branches in 4(5.1%) specimens. Superior polar artery was present in 18(22.8%) specimens and inferior polar artery was present in 32(40.5%) and both superior and inferior polar artery was seen in 5(6.3%) specimens. The length of primary segmental branches varied from 0.2 cm to 4.9 cm. The length of polar arteries varied from 0.7 cm to 5.7 cm. The diameter of primary segmental branches varied from 0.6 mm to 4.7 mm. The diameter of polar branches varied from 0.4 mm to 2.8 mm. Conclusion: The present study adds up to the existing knowledge regarding the morphometry of the segmental branches of splenic artery, as the various splenic conservative surgeries are dependent on better understanding of the vascular anatomy of the spleen. KEY WORDS: Splenic artery, Segmental branches, Polar artery.

Fast–Slow Variable Dissection with Two Slow Variables: A Case Study on Bifurcations Underlying Bursting for Seizure and Spreading Depression

The identification of nonlinear dynamics of bursting patterns related to multiple time scales and pathology of brain tissues is still an open problem. In the present paper, representative cases of bursting related to seizure (SZ) and spreading depression (SD) simulated in a theoretical model are analyzed. When the fast–slow variable dissection method with only one slow variable (extracellular potassium concentration, [Formula: see text]) taken as the bifurcation parameter of the fast subsystem is used, the mismatch between bifurcation points of the fast subsystem and the beginning and ending phases of burst appears. To overcome this problem, both slow variables [Formula: see text] and [Formula: see text] (intracellular sodium concentration) are regarded as bifurcation parameters of the fast subsystem, which exhibits three codimension-2 bifurcation points and multiple codimension-1 bifurcation curves containing the saddle-node bifurcation on an invariant cycle (SNIC), the supercritical Hopf bifurcation (the border between spiking and the depolarization block), and the saddle homoclinic (HC) bifurcation. The bursting patterns for SD are related to the Hopf bifurcation and the depolarization block while for SZ to SNIC. Furthermore, at the intersection points between the bursting trajectory and the bifurcation curves in plane ([Formula: see text], [Formula: see text]), the initial or termination phases of burst match the SNIC or HC point well or the Hopf point to a certain extent due to the slow passage effect, showing that the fast–slow variable dissection method with suitable process is still effective to analyze bursting activities. The results present the complex bifurcations underlying the bursting patterns and a proper performing process for the fast–slow variable dissection with two slow variables, which are helpful for modulation to bursting patterns related to brain disfunction.