Screws versus plate with screws for osteosynthesis of the posterior malleolus: a systematic review and meta-analysis.

INTRODUCTION: fractures involving the posterior malleolus (PM) of the ankle can have significant functional and clinical implications if not properly treated. The optimal treatment approach for these fractures remains uncertain. This review aims to compare the use of cannulated screws versus plate with screw fixation in terms of their impact on the development of postoperative ankle osteoarthritis and functional outcomes in patients with PM fractures. MATERIAL AND METHODS: a comprehensive search was conducted in PubMed, EMBASE, and Cochrane Library databases to identify studies directly comparing cannulated screws versus plate with screw fixation for PM fractures and their association with the development of postoperative osteoarthritis and functional outcomes. The quality of the included studies was assessed using appropriate assessment tools. The data on osteoarthritis development and functional outcomes were extracted and analyzed. RESULTS: a total of 691 articles were screened, and several studies were included for analysis. The findings revealed no statistically significant difference in the development of postoperative ankle osteoarthritis between the cannulated screws and plate with screw fixation groups. Similarly, there was no significant difference in functional outcomes between the two treatment approaches. CONCLUSION: based on the available evidence, there is no significant difference in the development of postoperative ankle osteoarthritis or functional outcomes between cannulated screws and plate with screw fixation for PM fractures. However, further research is needed to strengthen these findings and provide more conclusive evidence.

INTRODUCCIÓN: las fracturas que involucran el maléolo posterior (MP) del tobillo pueden tener importantes implicaciones funcionales y clínicas si no se tratan adecuadamente. El enfoque de tratamiento óptimo para estas fracturas sigue siendo incierto. El objetivo de esta revisión es comparar el uso de tornillos canulados versus placa con fijación de tornillos en cuanto a su impacto en el desarrollo de la osteoartrosis de tobillo postoperatoria y los resultados funcionales en pacientes con fracturas del MP. MATERIAL Y MÉTODOS: se realizó una búsqueda exhaustiva en las bases de datos de PubMed, EMBASE y Cochrane Library para identificar estudios que compararan directamente tornillos canulados versus placa con fijación de tornillos para fracturas de MP y su asociación con el desarrollo de osteoartrosis postoperatoria y los resultados funcionales. La calidad de los estudios incluidos se evaluó utilizando herramientas de evaluación adecuadas. Los datos sobre el desarrollo de osteoartrosis y los resultados funcionales se extrajeron y analizaron. RESULTADOS: se revisaron un total de 691 artículos y se incluyeron varios estudios para su análisis. Los hallazgos revelaron que no hay una diferencia estadísticamente significativa en el desarrollo de osteoartrosis de tobillo postoperatoria entre los grupos de tornillos canulados y placa con fijación de tornillos. Del mismo modo, no hubo una diferencia significativa en los resultados funcionales entre los dos enfoques de tratamiento. CONCLUSIÓN: según la evidencia disponible, no hay una diferencia significativa en el desarrollo de osteoartrosis de tobillo postoperatoria o en los resultados funcionales entre los tornillos canulados y la placa con fijación de tornillos para las fracturas del MP. Sin embargo, se necesita más investigación para fortalecer estos hallazgos y proporcionar evidencia más concluyente.

Screws versus plate with screws for osteosynthesis of the posterior malleolus: a systematic review and meta-analysis / Tornillos frente a placa con tornillos para la osteosíntesis del maléolo posterior: una revisión sistemática y meta-análisis

Abstract: Introduction: fractures involving the posterior malleolus (PM) of the ankle can have significant functional and clinical implications if not properly treated. The optimal treatment approach for these fractures remains uncertain. This review aims to compare the use of cannulated screws versus plate with screw fixation in terms of their impact on the development of postoperative ankle osteoarthritis and functional outcomes in patients with PM fractures. Material and methods: a comprehensive search was conducted in PubMed, EMBASE, and Cochrane Library databases to identify studies directly comparing cannulated screws versus plate with screw fixation for PM fractures and their association with the development of postoperative osteoarthritis and functional outcomes. The quality of the included studies was assessed using appropriate assessment tools. The data on osteoarthritis development and functional outcomes were extracted and analyzed. Results: a total of 691 articles were screened, and several studies were included for analysis. The findings revealed no statistically significant difference in the development of postoperative ankle osteoarthritis between the cannulated screws and plate with screw fixation groups. Similarly, there was no significant difference in functional outcomes between the two treatment approaches. Conclusion: based on the available evidence, there is no significant difference in the development of postoperative ankle osteoarthritis or functional outcomes between cannulated screws and plate with screw fixation for PM fractures. However, further research is needed to strengthen these findings and provide more conclusive evidence.

Resumen. Introducción: las fracturas que involucran el maléolo posterior (MP) del tobillo pueden tener importantes implicaciones funcionales y clínicas si no se tratan adecuadamente. El enfoque de tratamiento óptimo para estas fracturas sigue siendo incierto. El objetivo de esta revisión es comparar el uso de tornillos canulados versus placa con fijación de tornillos en cuanto a su impacto en el desarrollo de la osteoartrosis de tobillo postoperatoria y los resultados funcionales en pacientes con fracturas del MP. Material y métodos: se realizó una búsqueda exhaustiva en las bases de datos de PubMed, EMBASE y Cochrane Library para identificar estudios que compararan directamente tornillos canulados versus placa con fijación de tornillos para fracturas de MP y su asociación con el desarrollo de osteoartrosis postoperatoria y los resultados funcionales. La calidad de los estudios incluidos se evaluó utilizando herramientas de evaluación adecuadas. Los datos sobre el desarrollo de osteoartrosis y los resultados funcionales se extrajeron y analizaron. Resultados: se revisaron un total de 691 artículos y se incluyeron varios estudios para su análisis. Los hallazgos revelaron que no hay una diferencia estadísticamente significativa en el desarrollo de osteoartrosis de tobillo postoperatoria entre los grupos de tornillos canulados y placa con fijación de tornillos. Del mismo modo, no hubo una diferencia significativa en los resultados funcionales entre los dos enfoques de tratamiento. Conclusión: según la evidencia disponible, no hay una diferencia significativa en el desarrollo de osteoartrosis de tobillo postoperatoria o en los resultados funcionales entre los tornillos canulados y la placa con fijación de tornillos para las fracturas del MP. Sin embargo, se necesita más investigación para fortalecer estos hallazgos y proporcionar evidencia más concluyente.

Magnetic resonance based morphometric analysis of the tentorial notch.

BACKGROUND: The study of the tentorial notch can improve the understanding of brain injury mechanisms. Tentorial morphology has been analysed primarily in cadaveric studies. However, the postmortem effect can cause variability in the measurements. The objective was to evaluate the morphometry of the tentorial notch and the third cranial nerve on living subjects using magnetic resonance imaging (MRI). MATERIALS AND METHODS: A retrospective cross-sectional study was performed. Using consecutive cases, 60 MRI scans were analysed for tentorial notch morphology. Maximum notch width (MNW), notch length (NL), interpedunculoclival (IC) distance, apicotectal (AT) distance, third cranial nerve (CN-III) distance, and inter- CN-III angle, were obtained. For the classification of the tentorial notch quartile distribution technique for MNW, NL, AT distance, and IC distance were used. RESULTS: According to the quartile of the MNW, patients were stratified into narrow, midrange, and wide groups. Using the NL quartile groups, they were also classified as short, midrange, and long. With these, the tentorial notch could be classified into eight types. Statistical differences between genders in the MNW and inter-CN-III angle were found, as well as a strong positive correlation between NL and AT distance, and between right and left CN-III distances. CONCLUSIONS: There were differences between the cadaveric samples and living subjects in the CN-III distances. This difference could be explained by the dehydration of brain volume in the postmortem process which may cause nerve elongation. Morphometry of the tentorial notch and its neurovascular relations allows a better understanding of the mechanisms of brain herniation.

Morphometric variants of the paranasal sinuses in a Mexican population: expected changes according to age and gender.

BACKGROUND: There are developmental variations in the paranasal sinuses. Our objective was to determine their dimensions and volume stratified by age and sex and define the expected growth pattern. MATERIALS AND METHODS: A retrospective, observational study was performed including computed tomography (CT) of patients between 1 and 20 years of age. The volumes of the frontal, sphenoid, and maxillary sinuses were obtained. RESULTS: A total of 210 CT were included with a mean age of 10 ± 6.1 years, 106 (50.5%) were female. Groups were categorised in ranges of 5 years. Spearman correlation coefficients between the right and left sides were 0.843, 0.711, 0.916 for the frontal, sphenoid and maxillary sinuses. Post-hoc for the categorical age groups demonstrated statistically significant differences with values of p < 0.01, except between age groups 11-15 against ≥ 16 years of age (p = 0.8). Gender-related differences were evident with a higher air volume in girls in the 5-10-year-old group, while boys predominated in the rest of the groups. CONCLUSIONS: Computed tomography is ideal for pre-surgical sinus assessment. The maximum volume of paranasal sinuses is reached at the age of 15. There is a clear volumetric difference between age and gender groups. There is a direct relationship between a volume and its contralateral counterpart.

Volumetric assessment of the sella turcica: a re-evaluation.

BACKGROUND: The sella turcica volume is widely measured by the Di Chiro-Nelson method. The purpose is to compare the fidelity of a proposed volumetry method vs. the Di Chiro-Nelson method, using computed tomography (CT) images. MATERIALS AND METHODS: Morphometric examination of 173 CT scans were included, of which 52.6% were female. The mean age was 53.2 ± 17.6 years. Considering the Di Chiro-Nelson method, two measurements were added for each axis in the CT evaluation: length (central, left, and right), width (central, anterior, and posterior), and height (central, left, and right). RESULTS: The mean measurements were length: central 10.11 ± 1.44, left 7.45 ± 1.67, right 7.53 ± 1.59; width: central 12.27 ± 2.11, anterior 10.99 ± 1.92, posterior 10.10 ± 1.74; height: central 7.68 ± 1.38, left 7.16 ± 1.35, right 7.40 ± 1.41. A statistically significant difference between sexes was found only in the anterior width (p = 0.01). Using the proposed method, the volume was 342.2 ± 88.5 and 378. 6 ± 113.9 mm³, respectively for females and males (p = 0.02) vs. 476.1 ± 132.4 and 523.8 ± 186.0 mm3 (p = 0.05) using the Di Chiro-Nelson's method. CONCLUSIONS: Women had significantly smaller sella turcica volume than men. This proposed method considers the sella turcica as a not strictly symmetrical structure and indicates reduced variation between the maximum and minimum values, compared to the Di Chiro-Nelson's. Our findings may be useful for reassessment the volume of the sella turcica as the measurements indicate a higher precision.

Cochlear morphometry in healthy ears of a mexican population: A comparison of measurement techniques.

OBJECTIVE: This study describes the cochlear morphometry of a mexican population analysed by laterality and sex. The objective is to compare Cochlear Length (CL) evaluation between Alexiades et al. formula and manual method described by Würfel et al. PATIENTS: Hispanic patients from Mexico, with an age of 18 years or older, were included. Morphometric examination was performed retrospectively on 200 subjects who underwent previously temporal bone imaging for clinical purposes. MATERIALS AND METHODS: Horos for Mac program was used to measure CL, cochlear height, distance A, and distance B. WorkStation AW Volume Share 2 was used to obtain volume. CL was measured in 400 temporal bones (228 females, 172 males). RESULTS: The mean CL was 34.02mm±2.15mm. A significant difference was found in all variables between sex (P=≤0.05) and laterality (P=≤0.05). The Alexiades equation was used for determining CL and compared with the manual formula, with no significant differences (κ=0.71). However, the time consumption was 5 times faster with the calculated method. The Alexiades formula was demonstrated to be a reliable method measurement. CONCLUSION: Preoperative Computed Tomography evaluation of the internal ear helps to plan the Cochlear Implants (CI) surgical approach and allows to choose an appropriate electrode length for each necessity. Our findings may be useful to facilitate and adapt preoperative management of CI surgery by considering the characteristics of cochlear morphology of Latin-American populations.

Morphometry of the aortic arch and its branches. A computed tomography angiography-based study.

BACKGROUND: The current study aims to determine the prevalence of variations of the aortic arch using computed tomography angiography (CTA), as well as morphometries and gender correlations. MATERIALS AND METHODS: A retrospective, transverse, observational and descriptive study of 220 CTA was performed. The branching pattern, most cranial vertebral level of the aortic arch, area of the proximal, middle and distal segments of the arch, area of each branch, and the path of atypical arteries were recorded. Results were analysed and stratified by gender. RESULTS: The typical aortic arch branching pattern was present in 77.7% without statistical significance between genders. The most common variant was a two-branch pattern with a common trunk and a left subclavian (13.6%), followed by a typical branching pattern with an added left vertebral artery (7.3%). T3 was the most frequent cranial level (32.3%), followed by T2-T3 (26.8%), and T3-T4 (23.2%). The mean areas of the aortic arch were 685.5 ± 183.9, 476.1 ± 124.1, and 445.0 ± 145.1 mm2 for the proximal, middle and distal segments, with statistical difference between men and women in the middle and distal segments. Three paths of atypical arteries were identified: bifurcated vertebral artery (0.5%), aberrant right subclavian artery (0.5%), and left subclavian ostium obstruction (0.5%). CONCLUSIONS: Mexican population has one of the highest prevalence of variations in the aortic arch branching pattern. The high probability of finding these should be taken into consideration when assessing patients. A standardised classification method would contemplate future un-reported findings, without causing confusion by the different numbers assigned by each author.

A proposed extension to the elongated styloid process definition: A morphological study with high-resolution tomography computer.

The objective of the present study was to evaluate the morphology and angulation of the styloid process (SP), analyzing results stratified by gender, side and age on asymptomatic patients. We retrospectively analyzed 99 high-resolution computed tomography study images from asymptomatic patients. The images were assessed intra-observatory by a head and neck expert radiologist. Data for length, morphology, and angulation in a coronal and sagittal plane were recorded and stratified by age and gender. Morphology was classified according to the Langlais modified by Guimares classification. The mean lengths were 31.67±0.97mm and 31.64±0.90mm for the right and left sides respectively. Using the Langlais modified by Guimares classification, the normal type was the most prevalent and without a statistically significant difference when comparing between genders. A total of 27.6% presented a morphologically elongated SP (>25mm of continuous process), 49.5% presented a radiologically elongated SP (>30mm), and a total of 9.59% had a longer length than the proposed≤45mm. The right transverse angle was greater in men than women, and a statistically significant difference was found (P=0.010). We show the morphological variability of the SP. Although our results are reported with the traditional definition, the high prevalence supports the need for a new definition of elongated SP and a normal angulation ranges.

[The magnetic resonance imaging of the cerebral lesions in a newborn infant with tuberous sclerosis]. / Imagen por resonancia magnética de lesiones cerebrales en un recién nacido con esclerosis tuberosa.

Tuberous sclerosis is a neurocutaneous disease characterized of mental retardation, facial fibroangiomas, hypochromic stain and seizures. Is presented a case of a newborn that in the third day of life presenting seizures and in the physical exam show hypochromic CT scans irregular of 3-10 mm in thorax and limbs. The seizures presented during hospitalization were tonics, it was need treatment with three anticonvulsants for the control; the parents studies were normal. Magnetic resonance showed characteristic images of this pathology like nodular subependymal lesions, hyperintense, in lateral ventricles and a cortical tuberous lesion in the right frontal region. Tuberous sclerosis has a dominant autosomic transmission; the defect is in the chromosome 9, the prenatal diagnosis is not possible and 50-80% the of case are mutations. Affect a different organs as skin, eyes, heart, brain, kidney, bone and lung. The prognostic is variable and death is caused for epileptic state, brain tumor, heart failure, renal or intercurrent infection. The magnetic resonance imaging is the landmark study for diagnosis of this pathology of ample use in the present.

[Comparison of 2 methods of partial exchange transfusion in newborns with polycythemia: peripheral-peripheral and central-peripheral]. / Comparación de dos métodos para realizar exanguinotransfusión parcial en recién nacidos con policitemia: periférica-periférica y central-periférica.

Oneself presents the result of the prospective study from evaluate the morbility of the partial exchange-transfusion (exchange-dilution) to effect in two forms in newborn with polycythemia. The A group was newborn in the which extraction of blood volume was on peripheric vein is oneself administration crystalloid solution for another periphery vein; the B group was utilized umbilical vein to remove blood volume for another periphery vein is administration the crystalloid. To have 20 newborn in each group; to predisponent prenatal factors global were toxemic (12%); the plethora was the more frequent sing (55%) and nausea in (37%). Were not encountered difference in both groups for: gestational age, weight, birth rate, trophism, polycythemia type (asymptomatic vs symptomatic); neither to have difference in the seric electrolytes, protein and vital signs before and after procedure. Were encountered more infections process in the B group (P < 0.05). Were concluded what the exchange-dilution for polycythemia in newborn of term must be for periphery vein exclusive with security of not production metabolic and hemodynamic changes and without risk for sepsis and/or enterocolitis for manipulation of umbilical vessels.

[Variation in the blood lipids in premature newborns during the use of the "all-in-one" total nutritional mixture]. / Variación de los lípidos sanguíneos en recién nacidos prematuros durante la mezcla nutricional total "todo en uno".

This prospective study was performed for the evaluation of the lipids in serum; the metabolic and other effects related with septicaemia, stability and compatibility of the parenteral nutrition combining in one continent amino acids, carbohydrates and fats; this system is called nutritional total mixture, "all in one" or three in one. Twenty prematures neonates were included in the study. The variables analyzed were: weight, gestational age; the laboratory exams taken before the installation of the system and seven days after were: total lipids, triglycerides, phospholipids, cholesterol, sodium, potassium, chloride, glucose, urea nitrogen, creatinine, hepatic enzymes and proteins, cellular blood count and coagulations tests. We obtained the next results: the mean gestational age and weight were 34 +/- 5 weeks and 1327 +/- 172 g, have been observed rise of lipids (P < 0.001), declination of potassium levels (P < 0.001), increment of calcium levels (P < 0.001), increment of albumin (P < 0.001) and platelets (P < 0.01). It is concluded that nutritional total mixture is a sure method in management of premature newborn with good stability, compatibility, with a increment of fats in serum physiological levels, with metabolic tolerance without repercussion renal, hepatic, hematological and without infections.

[Utilization of percutaneous catheters in neonatology: insertion of 105 catheters]. / Utilización de los catéteres percutáneos en neonatología: colocación de 105 catéteres.

We present the results of one prospective study made it to evaluated central percutaneous catheters morbi-mortality in newborns critically sick ingresed in a Neonatal Intensive Care Unit (NICU). The total of 105 percutaneous catheter put it on in 97 newborns from one total 1554 catheter-days. We found in 53.3% were premature newborns, 74.2% weighted less than 2500 g, the femoral veins was used in 90%. The predominant morbidity at the moment of the colocations was respiratory problems, sepsis and mayor congenital malformation, the 30% the percutaneous catheter was had bacterial colonization when were retired; the catheter infection was 1.2 x 1000 catheter days. Our conclusion are the percutaneous catheter was the prime election to the vein access in the newborn critically stick, with low mortality rate during colocation and permanency, low sepsis incidence by catheter, and less quantity of venopunture stress and veins mutilation.

[Hepatic hemangioma in a premature newborn. The magnetic resonance images]. / Hemangioma hepático en un recién nacido prematuro. Imágenes por resonancia magnética.

Hepatic hemangiomas are benign vascular tumors that represent 5-15% of all liver tumors. They occur more often in females than in males (relation 2:1). They may produce cardiac failure, because of high output; less frequently hemolytic anemia, thrombocytopenia or bleeding are observed. We present a case of a newborn premature child with a gestation age of 34 weeks and weight of 1359 g who presents a palpable abdominal tumor in the right hypochondrium without additional symptoms. The diagnosis was confirmed by ultrasound with Doppler system any by means of the magnetic resonance imaging (MRI) both methods were able localize the hemangioma in the posterior segment of the right hepatic lobulus. MRI is a diagnostic tool which can provide finer anatomic details than ultrasound or axial computed tomography in hepatic hemangiomas. MRI has a sensitivity of 90% and specificity of 92%; the treatment depends of the complications which the patient presents.

[A giant follicular cyst of the ovary in a newborn infant]. / Quiste folicular gigante de ovario en una recién nacida.

The tumoral lesions proceeding of ovary in the newborns are the 3-6% of all abdominal tumors. The most frequent tumor is ovarian follicular cyst which will be diagnosed prenatally. As a result of ovarian stimulation by fetal gonadotrophins, maternal estrogen and placenta + gonadotrophins. Maternal antecedents reported diabetes, toxemia and isoimmunization. The most frequent complication is torsion. We present the case of one female newborn, with abdominal mass present by abdominal palpation referred of the first gestation of mother with 27 years of age, with primary sterility of 11 years without treatment, with toxemia during the pregnancy. The abdominal x-film show a intraperitoneal mass the ultrasound show cystic and solid mass, without determined origin, and the scan magnetic resonance (MR) a tumoral mass with origin in the pelvic hole with extension to the infrahepatic zone. The surgical finding was left ovarian cyst with left oophorectomy and salpingectomy.

[A study of 10 cases of neonatal tetanus]. / Estudio de 10 casos de tetanos neonatal

PIP: Tetanus is an infectious disease that can occur at any age and is highly lethal. In the present study, a review was made of all cases of tetanus between January 1979 and June 1985 at the University Hospital "Dr. Eleuterio Gonzalez" in Monterrey, Nuevo Leon, Mexico. Out of a total of 76 cases, 10 were newborns. Of these, 5 were female and 5 male. The average age at admission was 8.5 days and the period of Collis was 32.3 hours. All had been born in a septic environment at term and with an average birthweight of 3120 kgs. Using Jandra's classification, 3 cases were considered mild, 5 moderate, and 2 severe. The laboratory tests were not relevant. 9 patients were given Phenobarbital and Diazepam as sedatives; 6 received total parenteral alimentation, and 5 newborns were given mechanical ventilation during an average of 26.6 days. The most common complications were respiratory problems and septicemia. The average length of hospitalization was 26.3 days with a mortality rate of 50%. (author's)^ieng

Ambroxol, nuevo broncosecretolitico en afecciones broncopulmonares en pediatria. / Cambroxol, new bronchosecretolytic in bronchopulmonary disesases in pediatrics

Se presentan los resultados de un estudio clinico multicentrico nacional del tipo abierto no comparativo. Fue realizado en tres centros hospitalarios, en un total de 74 ninos con afecciones agudas y cronicas de las vias respiratorias, cuya manifestacion mas importante era la retencion de secreciones. Como secretolitico, el ambroxol modifico favorablemente el curso del padecimiento en 83.7% de los casos.Solo se uso medicacion antibiotica y/o broncodilatadora cuando se considero necesario. La tolerancia al medicamento fue excelente