Publications by authors named "Martin Herrera"

This review article provides a comprehensive overview of common medical emergencies that can occur in pregnant patients. We summarize the key diagnostic and management steps for each emergency to assist health care professionals in identifying and treating these potentially life-threatening conditions. The medical emergencies discussed in this article include postpartum hemorrhage; hemolysis, elevated liver enzymes, and low platelets (HELLP) syndrome; acute fatty liver of pregnancy; amniotic fluid embolism; pulmonary embolism; acute respiratory distress syndrome; and shock.

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Type 4 renal tubular acidosis (RTA) is a type of metabolic acidosis characterized by hyperchloremia and hyperkalemia resulting from the reduction in and/or resistance to aldosterone. RTA can be caused by multiple different medications including angiotensin-converting enzyme (ACE) inhibitor/angiotensin receptor blocker (ARB), potassium-sparing diuretics, and heparin. In this case, we discuss renal tubular acidosis caused by heparin use for the prevention of thromboembolic disease in COVID-19 infections.

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This case report describes a 60 year-old Black-American male with a past medical history of human immunodeficiency virus (HIV) infection and hyperthyroidism, who suffered a bilateral spontaneous pneumothorax (SP) in the setting of coronavirus disease 2019 (COVID-19) pneumonia. SP is a well-established complication in HIV-positive patients and only recently has been associated with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. While HIV and COVID-19 infections have been independently linked with increased risk of SP development, it is unknown if both infections interact in a synergistic fashion to exacerbate SP risk.

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Background And Aims: An effective bowel preparation is essential for quality colonoscopy. Inadequate preparation results in missed lesions, need for earlier repeat procedures, prolonged colonoscopy duration, an increased likelihood of adverse events, reduced patient satisfaction, and increased costs. The MOTUS GI Pure-Vu System (Tirat Carmel, Israel) is an Food and Drug Administration-cleared device designed to improve visualization in an inadequately prepared colon by facilitating intraprocedural cleaning.

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The present study was designed to confirm the wide traditional use of treating pain with Salix canariensis, an endemic species of the Macaronesian region. The active compounds were identified. Pharmacological activities were explored in experimental animals by acetic acid-induced writhing, formalin and Levy's tests, and bioactive compounds were identified after a bio-guided fractionation of the most active organic extract.

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Ethnopharmacological Relevance: Sambucus palmensis Link is an endemic species of the Canary Islands, popularly known as "Saúco canario". This species has wide use in folk medicine practice on the islands, especially as analgesic and anti-inflammatory. So the aim of our study is to evaluate the antinociceptive and anti-inflammatory activity of an aqueous extract of this species.

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Ethnopharmacological Relevance: Diuretic plants are widely used in traditional medicine in many countries. However, many of these species have not been subjected to experimental studies to confirm that property. In this paper, a simple new method is proposed to evaluate the diuretic activity of plants.

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Dyschromatosis universalis hereditaria (DUH) is a rare genodermatosis mainly described in asian subjects. Here, we report a case of a caucasian 11-year-old boy with DUH and an unaffected twin brother. Parents were not consanguineous.

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DAPI (4',6-diamidino-2-phenylindole) is a widely used fluorescent dye, whose complicated binding features to DNAs and RNAs have been the object of debates and are still not fully understood. In this study, different approaches were employed, including binding equilibrium measurements (spectrofluorometry), melting experiments (spectrophotometry), viscometric measurements, circular dichroism, and T-jump kinetic analyses; all data concur in shedding light on the complex mechanistic aspects of the binding mode of DAPI to natural DNA. Conditions are found that induce the mode of the DAPI/DNA interaction to change from groove binding to intercalation.

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Ethnopharmacological Relevance: Smilax canariensis is an endemic species of the Canary Islands, popularly known as "Zarzaparrilla sin espinas". The rhizome, leaves and stem of this species has wide use in folk medicine practice on the islands, where they are habitually employed as diuretic.

Aim Of The Study: In this paper we report on the diuretic activity in experimental animals of several fractions of the methanol extract of this species.

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Mantle cell lymphoma is a type of non-Hodgkin lymphoma that affects extranodal areas, especially, bone narrow, digestive tract and Waldeyer ring. Here we report a case of mantle cell lymphoma IV Ann Arbor stage with cutaneous lesions on nasal dorsum and glans penis as the first manifestations. Skin involvement is a very rare manifestation and less than 20 cases have been reported in the literature.

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Vitiligo is the most common depigmenting disorder, with a worldwide occurrence of 0.1-2% in the general population. Multiple conditions have been described colocalized in vitiligo patches, like psoriasis or lichen planus.

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Melanoma involving the conjunctiva is extremely rare. Graver prognosis has been reported with primary conjunctival melanoma than with their cutaneous counterparts [Collin et al.: Aust N Z J Ophthalmol 1986;14:29-34].

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Objective: The hepatocyte growth factor (HGF) is a pleiotropic cytokine produced by hepatic stellate cells and implicated in liver regeneration and fibrosis. Serum levels of HGF vary in liver diseases, reflecting hepatic damage and hepatocellular dysfunction. In this study, serum levels of HGF and the relationship between HGF and biochemical, histological and virological data, have been analysed in patients suffering from chronic hepatitis C (CHC).

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Clear cell sarcoma (CCS) is a recently described variant of sarcoma characterized by prominent clear cells showing features similar to clear cell melanoma. This neoplasm was first described by Dr. Franz M.

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Eccrine spiradenoma (ES) is a benign uncommon tumor of skin adnexa with a characteristic clinical and histopathological presentation. Typically, it presents as a painful, slow growing and solitary nodule on the head or upper trunk in adult patients. We report a child with linear ES which presented with asymptomatic papulonodular lesions in a blaschkoid distribution on the face.

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Aim Of The Study: Withania aristata is an endemic plant used traditionally in Canary Islands as a diuretic. In this paper, we report on this pharmacological activity in several extracts of the dry vegetal material collected and the identification and diuretic activity of two withanolides, one of them previously not reported, isolated from the most active fraction.

Material And Methods: Four Whitania aristata extracts at 100 mg/kg were orally administered to laboratory animals to evaluate their diuretic activity.

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Proteasome inhibitors are emerging as a promising class of anti-cancer therapeutic agents. Bortezomib (PS341) is the first proteosome inhibitor with clinical significance. It acts by blocking vital functions of tumoral cells in myeloma, inducing apoptosis.

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Unlabelled: The Light chain deposition disease (LCDD) is a strange entity characterised by the deposition of only one type of light chain in the renal tubular basement membranes. It can be associated to a plasma cell dyscrasia, however, it can occur in the absence of any detectable hematological disorder and it is called idiopathic LCDD. The clinical manifestation is renal insufficiency and nephrotic proteinuria, it does not have a clearly fixed treatment and has a severe prognosis.

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Ethnopharmacological Relevance: Smilax canariensis is an endemic species of the Canary Islands, popularly known as "Zarzaparrilla sin espinas". This species has wide use in folk-medicine practice on the islands, especially as diuretic. So the aim of our study is to evaluate the diuretic activity of an aqueous and a methanol extract of this species.

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