Location Of Perforation Research Articles

Numerical study of fixed ended Lean duplex stainless steel (LDSS) flat oval hollow stub column with square perforation under pure axial compression

This paper presents the parametric study of single square perforated fixed ended LDSS (Lean Duplex Stainless Steel) flat oval section stub columns, by varying the square perforation size, location of perforation along transversely as well as longitudinally, using the Finite element software Abaqus (2009). Based on the Finite element study, a near-linear reduction in ultimate load capacity with perforation size has been observed. The reduction is found to be higher for the stockier cross-sections as compared to slender sections. The percentage drop in ultimate load capacity remains relatively unaffected for larger perforation when the section is slender and located at the flat element. It is seen that, in comparison to the slender section, perforated stocky sections showed a mild drop in ultimate load as the perforation is located toward the corner junction of flat and curve portion from the mid-flat region. Further, in general, it is observed that the reduction in load capacity to be highest when the perforation is located near the mid-height. A design approach based on modified ASDM (Automotive Steel Design Manual) has been proposed to estimate the design capacity of single square perforated flat oval LDSS hollow columns

Perforations of tri-layer nitrile-latex and natural rubber latex gloves during ex-vivo equine intestinal anastomoses.

To compare perforation rates between tri-layer nitrile-latex and natural rubber latex surgical gloves after single-layer end-to-end jejunojejunal anastomoses in equine cadavers. Prospective randomized ex-vivo study. Pairs of surgical gloves (n=46) worn during jejunojejunal anastomoses. Tri-layer nitrile-latex and rubber latex pairs of gloves were equally but randomly allocated to a right-handed surgeon performing 46 single-layer end-to-end jejunojejunal anastomoses on cadaveric material. Number and location of perforations were determined with the water leak test after each procedure. Ten unused pairs of both glove types were tested as controls. At least one perforation occurred in 41% (19/46) of the pairs of gloves. Glove perforations were present in 22% (5/23; 95% CI: 9-42) of tri-layer glove pairs and 61% (14/23; 95% CI: 41-78) of the rubber glove pairs. The odds of glove perforation were 5.6 times (p=.009, 95% CI: 1.5-20.5) lower when tri-layer rather than rubber gloves were used. The duration of procedure did not affect the risk of glove perforation (p=.679). No perforations were observed in the unused gloves. Perforations were less common when the surgeon wore tri-layer nitrile-latex gloves rather than to the natural rubber latex gloves tested in this study. Tri-layer nitrile-latex gloves were more resistant to perforations in experimental settings; further studies may confirm that they are also superior in a clinical setting.

CT angiography prior to DIEP flap breast reconstruction: a randomized controlled trial

CT angiogram (CTA) has become the preferred method for the planning of abdominal-based microsurgical breast reconstruction to gather information about location, number, caliber and trajectory of the abdominal perforators and to decrease overall flap dissection and operating room time. However, the high-level evidence to support its utility has been limited to nonrandomized retrospective and prospective studies. Patients undergoing deep inferior epigastric artery perforator (DIEP) flap breast reconstruction were prospectively randomized to preoperative CTA and no imaging groups. Patient demographics, operative times, selected row and number of perforators for flap harvest, agreement in perforator selection between radiologist and surgeon, and clinical outcomes data were collected. Two-way ANOVA, Fisher's exact and Student's t-tests were used for statistical analysis. Overall, 37 patients with 63 flaps were included in this study. Seventeen patients had CT scan prior to surgery. Mean age was 50.5±9.6 years. Flap dissection time was significantly shorter in the CT group (150.8±17.8vs 184.7±25.1min and p< 0.001). Although overall odds ratio (OR) time was also shorter in the CT group, this only reached a statistical significance in bilateral surgeries (575.9±70.1vs 641.9±79.6min and p=0.038). Hemiabdomen side, selected DIEP row, and the number of dissected perforators did not affect the overall dissection time. Complication rates were similar between the two groups. This prospective, randomized study demonstrates that preoperative CTA analysis of perforators decreases flap harvest and overall OR time with equivalent postoperative outcomes.

Correlation of gastrointestinal perforation location and amount of free air and ascites on CT imaging

PurposeTo analyze the amount of free abdominal gas and ascites on computed tomography (CT) images relative to the location of a perforation.MethodsWe retrospectively included 172 consecutive patients (93:79 = m:f) with GIT perforation, who underwent abdominal surgery (ground truth for perforation location). The volume of free air and ascites were quantified on CT images by 4 radiologists and a semiautomated software. The relation of the perforation location (upper/lower GIT) and amount of free air and ascites was analyzed by the Mann–Whitney test. Furthermore, best volume cutoff for upper and lower GIT perforation, areas under the curve (AUC), and interreader volume agreement were assessed.ResultsThere was significantly more abdominal ascites with upper GIT perforation (333 ml, range 5 to 2000 ml) than with lower GIT perforation (100 ml, range 5 to 2000 ml, p = 0.022). The highest volume of free air was found with perforations of the stomach, descending colon and sigmoid colon. Significantly less free air was found with perforations of the small bowel and ascending colon compared to the aforementioned. An ascites volume > 333 ml was associated with an upper GIT perforation demonstrating an AUC of 0.63 ± 0.04.ConclusionUsing a two-step process based on the volumes of free air and free fluid can help localizing the site of perforation to the upper, middle or lower GI tract.Graphic abstract

Ultrasound-guided cyanoacrylate injection for the treatment of incompetent perforator veins.

ObjectiveThe use of cyanoacrylate products (CA) in incompetent perforator vein (IPV) treatment has not been thoroughly examined. The primary objective of this study is to describe the technique of ultra sound guided direct injection of IPV with CA, and secondarily to determine early closure rates and safety of this technique.MethodsA retrospective analysis of patients undergoing IPV injection at two centres between 2015-2018 was conducted. Demographics, CEAP classification and IPV location were collected. Outcomes were assessed at two follow-up appointments.ResultsA total of 83 perforator vein injections were completed. CEAP classifications include C2 – C6 classes. Location of perforators were posteromedial (6%), femoral canal (9%), paratibial (14%), and posterior-tibial (71%). IPV closure rates were 96.3% at initial follow-up (16 ± 2 days). Closure rates decreased to 86.5% at second follow-up (72 ± 9 days). There were no deep vein thromboses during follow-up. One patient developed septic thrombophlebitis that was successfully managed with antibiotics.ConclusionUltrasound-guided CA glue injection is a simple and low risk procedure that effectively closes incompetent perforator veins.

The Role of Dual-Energy Computed Tomography in Locating Gastrointestinal Tract Perforations.

ObjectiveWith each passing day, dual-energy computed tomography (DECT) is being used more frequently in the evaluation of abdominal pathologies. In this article, we aimed to assess the role of dual-energy CT in locating gastrointestinal perforations, which are among the causes of acute abdomen.Materials and methodsAll patients who underwent DECT due to acute abdomen in a COVID-19 designated hospital between June 1st, 2020 and December 31st, 2020, who were found to have gastrointestinal tract (GIT) perforation and underwent surgery were included in the study. DECT results and intraoperative findings of the patients were compared.ResultsThirteen patients (nine males and four females) who underwent DECT for acute abdomen and were diagnosed with perforation in the gastrointestinal system were included in the study. The mean age of the patients was 57.6 years (range: 11-85 years). Two patients had gastric perforation, three had duodenal perforations, and one patient had a perforation in the gallbladder wall. Two patients were diagnosed with jejunal perforations, one patient with Meckel's diverticulum, and three patients with colorectal perforation. Although free air was detected in the abdomen of one patient, perforation could not be located. In patients with GIT perforation who were operated on following DECT imaging, the perforation location shown on DECT correlated 100% with the perforation locations detected during surgery.ConclusionDECT is significantly effective in planning surgical treatment and determining the foci of perforation in GIT perforations.

The effect of the airflow pattern inside air gaps on the assessment of interstitial mould: A theoretical approach

Internal wall insulation is one of the few, possibly, the only feasible solution to efficiently reduce heat losses through the external walls of buildings where the application of external insulation is not an option, for example, in conservation areas. However, the application of this intervention may lead to unintended consequences, such as moisture accumulation and mould growth. Currently, no international standards and regulations exist to evaluate these hazards via non-destructive inspections. Air sampling through impaction and culture-based analysis was suggested in previous research as a potential non-disruptive methodology for interstitial mould testing. The method requires the perforation of the inner side of a wall and the creation of airflow through the operation of a pump, to allow the collection of particles from the confined space of interest. The present study aimed to assess the location of perforations and their effect on the airflow created and the airflow pattern variations due to changes in the airflow velocity at the outlet. Results regarding airflow features such as the turbulence intensity, dynamic pressure and volume-averaged velocity were also extracted and discussed. Practical application: The rapid changes in climate and net-zero emissions targets call for major improvements of the existing building stock towards a more sustainable future. The installation of internal wall insulation is one of the few and might be the only feasible solution for the efficient reduction of heat losses through uninsulated walls. However, this intervention might lead to moisture accumulation and thus moisture-related problems such as mould growth. This study aims to build upon previous work on interstitial mould growth assessment and contribute to the development of a well-defined testing protocol for building professionals.

Optimum Strategy for Perforating Distribution of Homogeneous Gas-Liquid Two-Phase Flow in Vertical Gas Wells.

Aiming to optimize the total production of homogeneous gas–liquid two-phase flow in perforated vertical gas wells, a new coupled reservoir–wellbore mathematical model is proposed which consists of the crushed zone damage skin factor, pressure gradient, flow rate, and liquid holdup. An optimum strategy consisting of two optimization problems is developed to study the effect of perforation distribution on the production of vertical wells under a steady-state inflow. Then, these optimization models are applied to infinite and finite conductivity gas wells and the optimal distribution of perforation could be determined. The results show that inflow rate profiles could be improved by optimizing the perforation location for vertical gas wells.

The experimental thermal and hydraulic performance analyses for the location of perforations and dimples on the twisted tapes in twisted tape inserted tube

Experimental heat transfer enhancement investigation is carried out by using various twisted tape inserted tube configurations under turbulent flow conditions. Constant heat flux is applied on the outer wall of the test tube. The working fluid is selected as water. The twisted tapes having twist ratio (y/w) of 5.88 are modified with perforations (PTTE) and dimples (DTTE) at the edge of the twisted tape. The ratio of the distances between the perforations/dimples (p) to the twist length (y), i.e. pitch ratio (p/y), are selected as 0.25, 0.50 and 1.00. The results show that using twisted tapes lead to increase thermal performance when compared to the smooth tube. The DTTEs promise more heat transfer performance rather than the PTTEs, while the PTTEs gives less friction loss penalty than the DTTEs. Overall results are given as performance evaluation criteria and the highest PEC value is obtained as 1.57 for DTTE_p/y = 0.25 type twisted tape insert used case at Reynolds number of 6367. In addition, the paper includes a comparative evaluation in terms of the heat transfer and the hydraulic performance about the perforations/dimples at the edge or centre of the twisted tape.

A Semianalytical Model for Simulating Fluid Flow in Tight Sandstone Reservoirs with a Bottom Aquifer

Water breaks through along fractures is a major concern in tight sandstone reservoirs with a bottom aquifer. Analytical models fail to handle the three-dimensional two-phase flow problem for partially penetrating inclined fractures, so time-consuming numerical simulation are often used for this problem. This paper presents an efficient semianalytical model for this problem considering three-dimensional fractures and two-phase flow. In the model, the hydraulic fracture is handled discretely with a numerical discrete method. The three-dimensional volumetric source function in real space and superposition principle are employed to solve the model analytically for fluid flow in the reservoir. The transient flow equations for flow in three-dimensional inclined fractures are solved by the finite difference method numerically, in which two-phase flow and stress-dependent properties are considered. The eventual solution of the model and transient responses are obtained by coupling the model for flow in the reservoir and discrete fracture dynamically. The validation of the semianalytical model is demonstrated in comparison to the solution of the commercial reservoir simulator Eclipse. Based on the proposed model, the effects of some critical parameters on the characteristics of water and oil flow performances are analyzed. The results show that the fracture conductivity, fracture permeability modulus, inclination angle of fractures, aquifer size, perforation location, and wellbore pressure drop significantly affect production rate and water breakthrough time. Lower fracture conductivity and larger inclination angle can delay the water breakthrough time and enhance the production rate, but the increment tends to decline gradually. Furthermore, water breakthrough will occur earlier if the wellbore pressure drop and aquifer size are larger. Besides, the stress sensitivity and perforation location can delay the water breakthrough time.

Does Size Affect the Rate of Perforation? A Cross-sectional Study of Medical Gloves.

Healthcare workers often have unnoticed minor abrasions on their hands, putting them at risk of contracting infectious diseases from patients, if the integrity of the medical gloves is compromised. This study aimed to compare the rate and location of glove perforation between well-fitted and ill-fitted gloves. The participants of this cross-sectional study were 45 midwives in the maternity ward of a hospital in Shiraz city, Iran. A total of nine pairs of medical gloves including three pairs of fit size, three pairs of gloves with one size smaller (tight), and three pairs of gloves with one size larger (loose) were given to subjects, and asked them to use the gloves during episiotomy repair operations. After completing the task, all gloves were collected safely and gloves perforation was investigated based on water test (NF EN 455-1). The perforation rate of the fit, tight, and loose medical gloves was 20, 37.78, and 34.81%, respectively. The results showed a significant difference between glove perforation of different glove sizes (P < 0.05). In general, there was a significant difference between the perforation rate of the fit glove and ill-fitted gloves (P = 0.013). Wearing the wrong size gloves may increase the glove perforation rate. Providing a wide range of glove sizes by the hospital management, and choosing the best glove size can be very effective in reducing the glove perforation and increasing safety for healthcare workers and patients.

Features of fracture height propagation in cross-layer fracturing of shale oil reservoirs

Triaxial fracturing modeling experiments were carried out on whole diameter shale cores from different layers of Shahejie Formation in the Dongpu sag, Bohai Bay Basin to find out the vertical propagation shapes of hydraulic fractures in different reservoirs. A numerical simulation method of inserting global cohesive elements was adopted to build a pseudo-three-dimension fracture propagation model for multiple shale oil reservoirs considering interface strength, perforation location, and pump rate to research the features of hydraulic fracture (HF) penetrating through layers. The hydraulic fracture propagates in a cross pattern in tight sandstone layers, in a straight line in sandstone layers with natural fractures, forms ladder fracture in shale layers with beddings. The hydraulic fracture propagates in a stripe shape vertically in both sandstone and shale layers, but it spreads in the plane in shale layers after connecting beddings. Restricted by beddings, the hydraulic fractures in shale layers are smaller in height than those in sandstone layers. When a sandstone layer and a shale layer are fractured at the same time, the fracture extends the most in height after the two layers are connected. Perforating at positions where the sandstone-shale interface is higher in strength and increasing the pumping rate can enhance the fracture height, thus achieving the goal of increasing the production by cross-layer fracturing in multiple shale oil layers.

Profile of Patients with Gaster Perforation at Dr. Moewardi General Hospital Surakarta in The Period of January-December 2018

Introduction: A gastric perforation is a form of hollow digestive organ perforation in which the entire thickness of the stomach wall is injured. Perforation of hollow organs can be suspected based upon the clinical picture, and the diagnosis becomes obvious through an image of free air on imaging performed.&#x0D; Methods: Data of patient characteristics were observed retrospectively from medical records of patients diagnosed with gastric perforation between January and December 2018.&#x0D; Results: Between January and December 2018, 45 patients with gastric perforation were identified, with data distributed by gender. There were 36 women (80%) and 9 men (20%) in the group. Based on the age group, 32 patients (71%) were distinguished by the age group over 40 years and 13 patients (29 %) under 40 years of age. When viewed from the location of the gastric perforations, it was found that 4 patients (9%) had a perforation in the antrum, 36 patients (80%) in the Prepylorus, and 5 patients (11.2%) in the major curvature. Data on analgesic use revealed 32 patients (71%) had a history of taking analgesics and 13 patients (29%) without a history of taking analgesics.&#x0D; Conclusion: In 2018, the majority of gastric perforation patients at Dr. Moewardi Hospital were female (80%), with the highest age group being over 40 years (71%) and the most gastric perforations occurring in the pylori (80%). The number of patients with gastric perforation who had previously used herbs and analgesics was higher (70%) than those who had not. Thus, the results of this retrospective study are consistent with previous research findings and can be used to continue research into the relationships (correlations) between the aforementioned variables.

Profile of Patients with Gaster Perforation at Dr. Moewardi General Hospital Surakarta in The Period of January-December 2018

Introduction: A gastric perforation is a form of hollow digestive organ perforation in which the entire thickness of the stomach wall is injured. Perforation of hollow organs can be suspected based upon the clinical picture, and the diagnosis becomes obvious through an image of free air on imaging performed.&#x0D; Methods: Data of patient characteristics were observed retrospectively from medical records of patients diagnosed with gastric perforation between January and December 2018.&#x0D; Results: Between January and December 2018, 45 patients with gastric perforation were identified, with data distributed by gender. There were 36 women (80%) and 9 men (20%) in the group. Based on the age group, 32 patients (71%) were distinguished by the age group over 40 years and 13 patients (29 %) under 40 years of age. When viewed from the location of the gastric perforations, it was found that 4 patients (9%) had a perforation in the antrum, 36 patients (80%) in the Prepylorus, and 5 patients (11.2%) in the major curvature. Data on analgesic use revealed 32 patients (71%) had a history of taking analgesics and 13 patients (29%) without a history of taking analgesics.&#x0D; Conclusion: In 2018, the majority of gastric perforation patients at Dr. Moewardi Hospital were female (80%), with the highest age group being over 40 years (71%) and the most gastric perforations occurring in the pylori (80%). The number of patients with gastric perforation who had previously used herbs and analgesics was higher (70%) than those who had not. Thus, the results of this retrospective study are consistent with previous research findings and can be used to continue research into the relationships (correlations) between the aforementioned variables.

Evaluation of Prognostic Factors and Middle Ear Risk Index in Type 1 Tympanoplasty

Background: Chronic suppurative otitis media (CSOM) is a long-standing infection of middle ear cleft, characterized by ear discharge and permanent perforation of tympanic membrane. Surgical treatment of CSOM is still controversial. Recently many studies have been undertaken to evaluate the prognostic impact of various factors on the outcomes of tympanoplasty. Nonetheless, only few studies have assessed the clinical preoperative assessment method that allows for tympanoplasty outcome to be predicted. Objective: To examine the role of the prognostic factors and middle ear risk index on the success of tympanoplasty. Patients and methods: The medical records of 100 patients who underwent type 1 tympanoplasty between 2018 and 2020 were prospectively reviewed. Prognostic factors such as age, sex, presence of systemic diseases, location and size of perforation, duration of dry period, presence of myringosclerosis, presence of septal and conchal pathology, operation type, and status of the opposite ear were evaluated. Middle ear risk index (MERI) was calculated and its correlation with the rate of success of surgery was evaluated. Results: It was noticed that experience of surgeon more than 5 years, absence of comorbidities and low middle ear risk score were significant predictors for success of tympanoplasty type 1 (P < 0.001, P < 0.001, P < 0.001 respectively). Conclusion: We found that younger age, female gender, no comorbidities, and higher surgeon experience were associated with better outcome. In addition, patients with mild MERI score showed higher rate of success for tympanoplasty. The surgeon experience and MERI were independent predictors of successful procedure.

Comparison of Medial Underlay and Lateral Underlay Endoscopic Type I Tympanoplasty for Anterior Perforations of the Tympanic Membrane.

To compare the outcomes of medial and lateral underlay endoscopic type I tympanoplasty for anterior tympanic membrane (TM) perforations. Retrospective chart review. Tertiary care academic referral center. Patients who were diagnosed with either chronic otitis media with dry and stable anterior TM perforations or traumatic anterior TM perforations and underwent endoscopic type I tympanoplasty between 2017 and 2019. Medial or lateral underlay type I endoscopic tympanoplasty. Patient demographics, size, and location of TM perforation, graft success rate, and hearing outcome. Of the 170 patients, 68 and 102 patients underwent the medial and lateral underlay techniques, respectively. Patient demographics were not significantly different between groups, except the middle ear mucosa status. Graft success rates were significantly different between groups regardless of the perforation size (85.3 and 95.1%, p < 0.001). The lateral underlay group had a significantly better outcome (p < 0.001) when anterior superior quadrant TM perforation was included than the medial underlay group (p = 0.552). Hearing outcomes did not significantly differ between groups, but a significant audiological improvement was observed in both groups (p < 0.05). Lateral underlay type I endoscopic tympanoplasty can be challenging as it requires dissection of the malleus. However, the lateral underlay group had a high graft success rate without sensorineural hearing loss in the repair of anterior TM perforations. Thus, lateral underlay type I endoscopic tympanoplasty should be considered for repairing anterior TM perforations, especially when the anterior superior quadrant is involved.

Revision of cartilage tympanoplasty with endoscopic butterfly inlay myringoplasty.

While the use of cartilage graft for revision tympanoplasty is quite common, the data on the revision of cartilage tympanoplasty are limited. Our study aims to present the results of our patients who underwent endoscopic butterfly inlay myringoplasty for the revision of cartilage tympanoplasty. Demographic data, ear sides, perforation locations, graft success rates and hearing results of the patients who underwent endoscopic butterfly inlay myringoplasty for revision of cartilage tympanoplasty between Sep 2017 and Jan 2020 were evaluated. A total of 17 patients with 7 (41%) females and 10 (59%) males were included in our study. Eight of the ears (47%) were right and nine (53%) were left. Perforation locations included ten (59%) anterior, six (35%) inferior, and one (6%) posterior. The graft success rate of our study was 100%. No changes were observed in post-operative air conduction, bone conduction and air-bone gap values compared to the pre-operative period (p > 0.05). Endoscopic butterfly inlay myringoplasty for the revision of cartilage tympanoplasty is considered to be a safe surgical technique with satisfactory anatomical and hearing results.

Absorption Mechanism and Optimization of a Subwavelength Acoustic Absorber

A subwavelength acoustic absorber based on parallel coupled Helmholtz resonators is designed to extend the absorption band, where the lateral space is used and verified to reduce the overall thickness. Both theoretical analysis and finite element method are used to demonstrate the low frequency absorption performance. The ratio of absorber thickness to resonant wavelength acquires only 1.87%. It has found that the side location of perforation can move the absorption peak to lower frequency range. The absorption mechanism is investigated by analysing reflection coefficient in the complex frequency plane. The energy dissipation modes underlying absorption performance are further revealed by the viscous energy dissipation patterns. Finally, the absorber is optimized by a DE algorithm to extend the absorption band below 500Hz. The present design offers us an acoustic absorber with excellent stiffness and strength for low-frequency absorption.

Parametric effect of diverging perforated cones on the thermo-hydraulic performance of a heat exchanger tube

In the present work, conical frustums (d/D = 0.3) are used as turbulators to form an insert of a heat exchanger tube. Both the perforated and imperforated conical inserts in a diverging arrangement (DR arrangement) are experimentally studied. The effects of the parameters like pitch ratio (p/D), the number of perforated holes (N), and relative location of perforations (x/L) on thermal and fluid characteristics are investigated. The results indicate that the inserts are effective in mixing the fluid at a lower temperature in the core region with the fluid at a higher temperature near the wall. Perforation and its effect on thermo-hydraulic performance are critically examined in the study. Perforations near the small-end diameter of the conical insert are found to be effective in terms of reduction in frictional loss and also increment of heat transfer near the wall region. The maximum thermo-hydraulic performance (η) is found to be 1.38 for the perforated conical insert in the diverging arrangement (PDR) having d/D = 0.3, p/D = 2, x/L = 0.5, N = 4 at the Reynolds number of 6258.

Role of Mastoidectomy with Type 1 Tympanoplasty in Paediatric Patients with Poor Contralateral Ear Status.

The aim of the study was to assess the role of mastoidectomy with type 1 tympanoplasty in the management of paediatric patients with poor contralateral ear status and to evaluate the prognostic factors that may influence the success outcome of type 1 tympanoplasty. A prospective study of 112 paediatric patients from 4 to 12years of age. All patients in the study had bilateral ear perforations. They were randomly assigned to undergo either type 1 tympanoplasty (group 1, n = 56) or type 1 tympanoplasty with mastoidectomy (group 2, n = 56). The outcomes between the two groups were compared at 12months postoperative period. The outcomes evaluated were: 1. anatomical condition of the tympanic membrane, 2. functional improvement in hearing (≥ 10db), 3. air-filled middle ear space without atelectasis or otitis media with effusion, 4. overall outcome. The outcomes were also compared in both the surgical groups for patients who were ≤ 8years (n = 51) and > 8years (n = 61) of age. Prognostic factors for success outcome for type 1 tympanoplasty were evaluated. The prognostic factors considered were age at the time of surgery, age groups, duration of the disease prior to surgery, previous adenoidectomy, mechanism of perforation, location of perforation, size of the perforation, type of ear surgery performed (tympanoplasty with or without mastoidectomy). The success outcome in anatomical condition of the tympanic membrane was significantly higher in mastoidectomy group (p = 0.015) but was not significantly different in those ≤ 8years and > 8years (p = 0.112, p = 0.064 respectively).There was no difference in the functional improvement in hearing in both the surgical groups for all patients, ≤ 8years and > 8years (p = 0.188 p = 0.061, p = 0.865 respectively). Mastoidectomy group showed significantly higher success outcome for air-filled middle ear space without atelectasis or OME for all patients, ≤ 8years and > 8years (p < 0.001, p = 0.004, p = 0.041 respectively).Overall success was significantly higher in mastoidectomy group for all patients and ≤ 8years (p = 0.040, p = 0.012 respectively),but not significantly different for > 8years (p = 0.592).Out of the prognostic factors considered for success only the type of ear surgery performed showed as a better predictor for success (AUC = 0.606, p = 0.046). Cortical mastoidectomy done along with type 1 tympanoplasty in paediatric patients with poor contralateral ear showed statistically significant higher overall success outcome. Although mastoidectomy done with type 1 tympanoplasty showed better success outcome in patients above 8years, it was not statistically significant. Except the type of ear surgery performed, none of the prognostic factors considered could influence the success outcome. Our study recommends mastoidectomy to be combined with type 1 tympanoplasty in paediatric patients aged ≤ 8years with poor contralateral ear status to enhance the overall success outcome.