Patients & CaregiversHealthcare ProfessionalsWorldwide
HomeAbout MerckProductsNewsroomInvestor RelationsCareersResearchLicensingThe Merck Manuals
THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Diagnosis and Therapy
Tips for better results
ABCDEFGHI
JKLMNOPQR
STUVWXYZ
Sections
Resources
Index
lalelhlilolplsluly
Type in the first few letters of a word to get there faster:
Go

LA

LAAM (levomethadyl acetate)

Opioids: Maintenance

Labetalol

  • in aortic dissection

  • Aortic Dissection: Treatment

  • in hypertensive emergency

  • Parenteral Drugs for Hypertensive EmergenciesTables
    Hypertensive Emergencies: Treatment

  • in pregnancy

  • Hypertension in Pregnancy: Diagnosis and Treatment

    Labor and delivery

    see also Birth
    Management of Normal Labor
    Management of Normal Delivery
    Sequence of events in delivery for vertex presentations. Figures

  • abnormal presentations during

  • Fetal Dystocia: Occiput posterior presentation
    Evaluation and Care of the Normal Neonate: Physical examination

  • analgesia for

  • Management of Normal Labor: Analgesia

  • anesthesia for

  • Management of Normal Labor: Analgesia
    Management of Normal Delivery: Anesthesia

  • breech presentation during

  • Fetal Dystocia: Breech presentation

  • cardiac output during

  • Heart Disorders in Pregnancy: Pathophysiology

  • care after

  • Postpartum Care

  • complications of

  • Management of Normal Labor: Birthing options
    Abnormalities and Complications of Labor and Delivery

  • diabetes mellitus and

  • Diabetes Mellitus in Pregnancy: Labor and delivery

  • dystocia in

  • Fetal Dystocia

  • fetal monitoring during

  • Management of Normal Labor: Fetal Monitoring
    Small-for-Gestational-Age (SGA) Infant: Complications

  • fetopelvic disproportion during

  • Fetal Dystocia: Fetopelvic disproportion

  • forceps for

  • Management of Normal Delivery: Delivery Procedures
    Alternatives to Spontaneous Delivery: Forceps Delivery and Vacuum Extraction

  • head molding during

  • Evaluation and Care of the Normal Neonate: Physical examination

  • hemorrhage after

  • Postpartum Hemorrhage
    Perinatal Anemia: Blood loss

  • induction of

  • Alternatives to Spontaneous Delivery: Induction of Labor

  • infection with

  • Infections in Neonates

  • inverted uterus and

  • Inverted Uterus

  • Leopold maneuvers for

  • Leopold maneuver. Figures

  • meconium aspiration during

  • Meconium Aspiration Syndrome

  • occiput posterior presentation during

  • Fetal Dystocia: Occiput posterior presentation

  • premature rupture of membranes and

  • Management of Normal Labor: Rupture of membranes
    Premature Rupture of Membranes (PROM)

  • preterm

  • see also Premature infant
    Risk Factors: Prior preterm delivery
    Preterm Labor

  • protracted

  • Protracted Labor

  • Ringer's lactate during

  • Management of Normal Labor: Preparation for delivery

  • shoulder dystocia during

  • Fetal Dystocia: Shoulder dystocia

  • stages of

  • Management of Normal Labor: Stages of labor

  • transverse lie during

  • Fetal Dystocia: Transverse lie

  • umbilical cord prolapse and

  • Umbilical Cord Prolapse

  • vacuum extraction for

  • Alternatives to Spontaneous Delivery: Forceps Delivery and Vacuum Extraction

    Laboratory tests

    see also specific tests

  • in acute renal failure

  • Causes of Acute Renal Failure Based on Laboratory FindingsTables

  • in clinical decision making

  • Diagnostic Testing
    Distributions of test results. Figures
    Cardiac Troponin I Levels in Acute Ischemic Heart DiseaseTables
    Interpretation of Cardiac Troponin I Results Using Bayes' TheoremTables

  • false-negative

  • Diagnostic Testing
    Distributions of test results. Figures

  • false-positive

  • Diagnostic Testing
    Distributions of test results. Figures

  • odds-likelihood formulation for

  • Bayes' Theorem: Odds-Likelihood Formulation

  • sensitivity of

  • Diagnostic Testing
    Bayes' Theorem: Defining a Positive Test Result
    Distributions of test results. Figures

  • specificity of

  • Diagnostic Testing
    Bayes' Theorem: Odds-Likelihood Formulation
    Distributions of test results. Figures

  • threshold for

  • Determining a Threshold for Treating
    One-way sensitivity analysis of testing threshold tree.Figures

  • units of measurement for

  • Ready Reference Guides

    Laboratory worker's lung

    Examples of Hypersensitivity Pneumonitis Tables

    Labyrinthitis

    Vertigo: History
    Purulent Labyrinthitis

    Lacerations

    Lacerations
    Suture MaterialsTables
    Simple subcutaneous suture. Figures
    Simple cutaneous suture.Figures
    Suture spacing.Figures
    Vertical mattress suture.Figures
    Running suture.Figures

  • ocular

  • Contusions and Lacerations

    Lachman's test

    Knee Sprains and Meniscal Injuries: Diagnosis

    Lacrimal apparatus

    Anatomy of the lacrimal system.Figures

  • infection of

  • Tearing: Dacryocystitis

  • irrigation of

  • Tearing: Diagnosis

  • obstruction of

  • Tearing
    Causes of TearingTables

  • palpation of

  • Approach to the Ophthalmologic Patient: Eyelid and conjunctival examination

    Lacrimal sac

    Anatomy of the lacrimal system.Figures

  • infection of

  • Dacryocystitis

    Lacrimal system

  • disorders of

  • Eyelid and Lacrimal Disorders

    La Crosse encephalitis

    Arbovirus, Arenavirus, and Filovirus Diseases Tables
    Encephalitis: Etiology and Pathophysiology

    β-Lactam antibiotics

    see also Penicillin
    Bacteria and Antibacterial Drugs: Selection and Use of Antibacterial Drugs
    Usual Doses of Commonly Prescribed Antibiotics Tables
    β-Lactams

  • aminoglycoside interaction with

  • Aminoglycosides: Pharmacology

    Lactase deficiency

    Gas-Related Complaints: Excessive flatus
    Carbohydrate Intolerance

    Lactate

  • serum

  • in shock

  • Intravenous Fluid Resuscitation: End point and Monitoring

    Lactate dehydrogenase (LDH)

  • in anemia

  • Evaluation of Anemia: Testing

  • disease-related alterations in

  • Laboratory Tests: Lactate dehydrogenase

    Lactation

    see also Breastfeeding
    see also Breast milk
    Postpartum Care: Management in the Hospital

  • abnormal

  • Galactorrhea

  • suppression of

  • Postpartum Care: Management in the Hospital

    Lactic acidosis

    Metabolic Acidosis: Lactic Acidosis

    Lactobacillus

    Gastroenteritis: Antimicrobials

    Lactobionate

    Usual Doses of Commonly Prescribed Antibiotics Tables

    Lactose-H2 breath test

    Malabsorption Syndromes: Diagnosing the cause of malabsorption
    Carbohydrate Intolerance: Diagnosis

    Lactose intolerance

    Carbohydrate Intolerance

  • diarrhea with

  • Diarrhea: Osmotic load
    Dietary Factors That May Worsen DiarrheaTables
    Diarrhea: Etiology

  • irritable bowel syndrome and

  • Irritable Bowel Syndrome (IBS): Diet

  • protein-energy undernutrition and

  • Protein-Energy Undernutrition: Prevention and Treatment

  • test for

  • Carbohydrate Intolerance: Diagnosis

    Lactose tolerance test

    Carbohydrate Intolerance: Diagnosis

    Lactotrophs

    Principles of Endocrinology: Prolactin

    Lactulose

  • constipation and

  • Agents Used to Treat ConstipationTables
    Constipation: Types of laxatives

  • diarrhea and

  • Diarrhea: Osmotic load

  • in portal-systemic encephalopathy

  • Portal–Systemic Encephalopathy: Treatment

    Lacunar infarct

    Selected Stroke SyndromesTables
    Ischemic Stroke: Lacunar infarcts
    Ischemic Stroke: Symptoms and Signs

    Lagophthalmos

  • leprosy and

  • Leprosy: Complications

    Laguna Negra virus infection

    Hantavirus Infection: Hantavirus Pulmonary Syndrome

    Lambert-Eaton syndrome

    Examples of Disorders Associated With Defects in Neurotransmission Tables

    Lamin A

    Progeria

    Laminaria

    Induced Abortion: Instrumental evacuation

    Lamivudine

    Antiretroviral Drugs Tables
    Human Immunodeficiency Virus (HIV): Treatment

  • in children

  • Dosage and Administration of Antiretroviral Drugs for Children* Tables

  • in chronic hepatitis B

  • Comparison of Drugs Commonly Used to Treat Chronic Viral Hepatitis B*Tables
    Chronic Hepatitis: HBV

    Lamotrigine

  • in bipolar disorder

  • Selected Drugs for Bipolar DisorderTables

  • during breastfeeding

  • Drugs Contraindicated for Breastfeeding Mothers Tables

  • in seizures

  • Drugs Used in Seizure Disorders*Tables

    Lancaster red-green tests

    Diplopia

    Langer-Giedion syndrome

    Examples of Contiguous Gene SyndromesTables

    Langerhans' cell

    Components of the Immune System: Antigen-Presenting Cells

    Langerhans' cell histiocytosis (granulomatosis)

    Tumors of Bones and Joints: Symptoms, Signs, and Diagnosis
    The Histiocytic SyndromesTables
    Langerhans' Cell Histiocytosis

  • pulmonary

  • Pulmonary Langerhans' Cell Granulomatosis

    Language

  • development of

  • Development: Language development

  • autism and

  • Autism Spectrum Disorders: Symptoms, Signs, and Diagnosis

  • dyslexia and

  • Learning Disabilities: Symptoms and Signs
    Learning Disabilities: Diagnosis

  • loss of

  • Aphasia

    Lanreotide

    Gigantism and Acromegaly: Treatment

    Lansoprazole

    Some Oral Drugs for DyspepsiaTables
    Drug Treatment of Gastric Acidity: Proton pump inhibitors
    Proton Pump InhibitorsTables

  • in gastroesophageal reflux disease

  • Gastroesophageal Reflux Disease (GERD): Treatment

  • in Helicobacter pylori infection

  • Helicobacter pylori Infection: Treatment

    Lanthanum carbonate

    Medical Aspects of Long-Term Renal Replacement Therapy: Hyperphosphatemia

    Laparoscopy

    Laparoscopy

  • in appendicitis

  • Appendicitis: Diagnosis

  • in gynecologic evaluation

  • General Gynecologic Evaluation: Testing

  • in jaundice

  • Jaundice: Testing

    Laparotomy

    Foreign Bodies: Gastric and intestinal foreign bodies

    Large-for-gestational-age infant

    Level of intrauterine growth based on birth weight and gestational age of liveborn, single, white infants. Figures
    Large-for-Gestational-Age (LGA) Infant

    Large intestine

    see Colon

    Larsen's syndrome

    Hip, Leg, and Foot Abnormalities: Knee dislocation

    Larva migrans

    Cutaneous Larva Migrans
    Hookworm Infection: Symptoms and Signs

  • ocular

  • Toxocariasis

  • visceral

  • Toxocariasis

    Laryngeal mask airway

    Airway Establishment and Control: Airway and Respiratory Devices

    Laryngectomy

    Laryngeal Cancer: Treatment and Prognosis

    Laryngitis

    Laryngitis

    Laryngoceles

    Laryngoceles

    Laryngopharyngectomy

    Laryngeal Cancer: Treatment and Prognosis

    Laryngoscopy

    Laryngeal Disorders

  • in epiglottitis

  • Epiglottitis: Diagnosis

  • in smoke inhalation

  • Smoke InhalationSidebars

    Laryngotracheobronchitis

    Parainfluenza Virus Infections

    Larynx

  • cancer of

  • Laryngeal Cancer

  • evaginations of

  • Laryngoceles

  • inflammation of

  • Laryngitis

  • spastic dystonia of

  • Dystonias: Focal dystonias

  • tumors of

  • Benign Tumors

  • ulcers of

  • Contact Ulcers

  • visualization of

  • Laryngeal Disorders

    Laser peripheral iridotomy

    Angle-Closure Glaucoma: Acute angle-closure glaucoma

    Laser trabeculoplasty

    Primary Open-Angle Glaucoma: Surgery

    LASIK (laser in situ keratomileusis)

    Refractive Surgery: Laser In Situ Keratomileusis (LASIK)

    Lassa fever

    Selected Viruses That Infect Humans* Tables
    Arbovirus, Arenavirus, and Filovirus Diseases Tables
    Arboviridae, Arenaviridae, Bunyaviridae, and Filoviridae
    Lassa Fever

    Latanoprost

    Drugs Used to Treat Glaucoma Tables

    Lateral epicondylitis

    Lateral Epicondylitis

    Lateral sclerosis

    Motor Neuron Disorders: Primary lateral sclerosis and progressive pseudobulbar palsy

    Latetalol

    β -Blockers for HypertensionTables

    Latex agglutination test

    Acute Bacterial Meningitis: Diagnosis

  • in neonatal sepsis

  • Neonatal Sepsis: Other tests for infection and inflammation

    Latex allergy

    Diabetes Mellitus (DM): Insulin
    Latex SensitivitySidebars

    Laurence-Moon syndrome

    Major Groups of Cystic NephropathiesTables
    Renal Cystic Disease in Malformation Syndromes
    Male Hypogonadism in Children: Secondary

    Lavage

  • bronchoalveolar

  • Bronchoscopy

  • in Goodpasture's syndrome

  • Pulmonary-Renal Syndrome: Diagnosis

  • in hypersensitivity pneumonitis

  • Hypersensitivity Pneumonitis: Diagnosis

  • in idiopathic interstitial pneumonia

  • Idiopathic Interstitial Pneumonias: Diagnosis

  • in pneumonia

  • Hospital-Acquired Pneumonia: Symptoms, Signs, and Diagnosis

  • in pulmonary alveolar proteinosis

  • Pulmonary Alveolar Proteinosis: Symptoms, Signs, and Diagnosis

  • in sarcoidosis

  • Sarcoidosis: Diagnosis

  • gastric

  • in poisoning

  • General Principles: Gastric emptying

  • nasogastric

  • GI Bleeding: Testing

  • peritoneal

  • Approach to the Trauma Patient: Testing

  • whole lung

  • in pulmonary alveolar proteinosis

  • Pulmonary Alveolar Proteinosis: Treatment

  • in silicosis

  • Silicosis: Treatment

    Laxatives

    Agents Used to Treat ConstipationTables
    Constipation: Types of laxatives

  • abuse of

  • Diarrhea: Testing
    Drug- and Chemical-Related Gastroenteritis
    Disorders of Potassium Concentration: Drugs
    Causes of Metabolic AlkalosisTables

  • for children

  • Constipation: Treatment

  • for dying patient

  • Symptom Control in the Dying: Constipation

  • for elderly

  • High-Risk Drugs in the Elderly (Based on Beers Criteria) Tables

  • porphyria and

  • Drugs and Porphyria* Tables

    Lazarus sign

    Brain Death: Prognosis

    lalelhlilolplsluly
    Audio
    Figures
    Photographs
    Tables
    Videos
    Contact UsSite MapPrivacy Policy