Dose Adjustment in Renal Disease Free Essays

GENERAL APPROACHES FOR DOSE ADJUSTMENT IN RENAL DISEASE Renal insufficiency can markedly alter one or more of the pharmacokinetic parameters of a drug including oral bioavailability, volume of distribution, drug binding to plasma proteins, and most importantly the rates of metabolism and excretion, i. e. , drug clearance. We will write a custom essay sample on Dose Adjustment in Renal Disease or any similar topic only for you Order Now . To minimize drug toxicity and maximize therapeutic benefits, it is often necessary to adjust drug dosage in proportion to the degree of renal insufficiency. A drug will most likely require dose adjustment in renal disease if: 1. A substantial fraction ( 40%) of the drug dose is excreted by the kidney either unchanged or as an active (or toxic) metabolites. 2. The drug or its active metabolite has a narrow therapeutic window such that drug accumulation cannot be tolerated. 3. The kidney is a major site for the inactivation of the drug. This applies mainly to peptides like insulin, glucagon, PTH, and imipenem. 4. There is a significant drop in the binding of the drug to plasma proteins. For instance, a decrease in the protein binding from 99 to 95% results in a fourfold rise in the unbound, active drug concentration. Dose adjustment may involve one or a combination of the following measures: 1. Extension of the dosing interval. 2. Reduction of the maintenance dose. 3. Administration of a loading dose. 4. Monitoring serum drug levels. FACTORS IN CHOOSING OF DOSE ADJUSTMENT APPROACH: Factors to consider when choosing appropriate dose adjustment approach are the class of drug ,the amplitude of the peak-trough fluctuation relative to the therapeutic index, magnitude of the dose with respect to the dose strength to be marketed and practicality of calculated dosing interval. Pharmacokinetic simulations can be especially helpful in visualizing the impact of various dose and interval changes and interval changes on the concentration time (C-T) profile at steady state. Reduced elimination of a drug prolongs its half life (t? ) as well as the time required for the serum level to reach a steady state (4 times t? ). Therefore, whenever it is clinically desirable to rapidly achieve a therapeutic steady state level a loading dose should administered. To maintain a therapeutic level and, at the same time, avoid drug accumulation and toxicity in a patient with reduced renal function, the clinician must consider reducing the size of the maintenance dose or the dosing frequency or both. In general, this reduction should also be proportional to the degree of renal impairment , but should also take into account adaptive or compensatory changes in the metabolism and excretion of the drug through non-renal routes. MAINTENANCE DOSE REDUCTION METHOD: The maintenance dose reduction method is used whenever a more constant (less oscillating) serum drug level is therapeutically preferable (e. . , ? -lactam antibiotics) Let us assume that one has already defined a safe and effective dose regimen for use in normal patients. This normal dose regimen is then adjusted according to dose fraction by two basic procedures. First method termed as constant interval, dose-reduction (DR) reduces the dose (D) by a factor of the dose fraction. Dose interval is the same as that used in the health person. D renal failure = D normal Kf t renal failure = t normal INTERVAL EXTENSION METHOD The second method referred to as constant dose, interval-extension(IE) extends dose interval by inverse of dose fraction, a value referred to as the dose interval multiplier : t renal failure = t normal (1/ kf) D renal failure = D normal This type of dose adjustment strategy may also be implemented through the use of a nomogram where the dosage interval multiplier for this IE regimen is simply read off a plot of creatinine clearance Interval extension method is used for drugs for which a constant serum level is either unnecessary (eg, vigabatrin) or undesirable (e. g. , aminoglycoside antibiotics). This method is also used for drugs that normally have long elimination t?. However, a combination of the two methods is often used. In addition, for a drug whose therapeutic serum level range is known and routinely measured, dosage adjustment is often guided by monitoring the serum drug level and the patient’s response in terms of the therapeutic benefit and adverse drug reactions (toxicity). Reference:: http://www. hedrugmonitor. com/RIT97. html http://books. google. com. pk/books? id=qXw33GaQF9IC=PA288=PA288=general+approaches+to+dose+adjustment+in+renal+patients=bl=IKsqNAp2nU=jglKfgGimUFQ_xBN9cGKPPRsC2E=en=CxbTStLaAo-QkQX1_N30Aw=X=book_result=result=7=0CCMQ6AEwBjgK#v=onepage=general%20approaches%20to%20dose%20adjustment%20in%20renal%20patients=false http://www. gbv. de/du/services/toc/bs/380847361 http://books. google. com. pk/books? id=9324ILATCgMC=PA288=general+approaches+to+dose+adjustment+in+renal+DISEASE#v=onepage=general%20approaches%20to%20dose%20adjustment%20in%20renal%20DISEASE=false How to cite Dose Adjustment in Renal Disease, Papers

Social Media in Arab Spring free essay sample

Facebook, Twitter, Youtube and other social media websites were the driving force in Arab Spring. â€Å"Arab Spring† translated to Arab revolutions in Arabic, were series of protests and demonstrations against dictatorship, absolute monarchy, human rights violations, and government corruption (SOURCE). Protests around the Middle East were sparked by posts, photos and updates on popular social media websites such as Facebook, Twitter, and Youtube. Pro-government officials responded to these protests violently These violent attacks led by supporters of the government sparked more drive, anger, and inspiration in protesters to strive for change. One by one totalitarian governments began to fall and the goal of the young protesters was in sight . Government corruption, inequality, censorship, and mass unemployment in the younger, educated, generation were prevalent in Tunisia (#2). The protests in the country were inspired around Mohamed Bouazizi (#2). Bouazizi was a young, well educated, man, who was the sole provider for his family of seven (#1). We will write a custom essay sample on Social Media in Arab Spring or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Due to the absence of his vendors permit, police took his cart, and slapped him Fed up with public humiliation, government corruption and his unemployment, Bouazizi lit himself on fire in front of a government building in protest . That day in December 2010, protests broke out, and were documented and shared online (ONE). The protesters relied on Facebook and Twitter to share updates of each demonstration Also calls and the organization of the next protest would be announced on those websites (TWO). In only a month’s time, President Zine El Abidine Ben fled the countr. Soon the actions of the Tunisians and Mohamed Bouazizi snowballed into one, unified protest for change all over the Middle

Lab report water Sample

Lab report water Paper If the amylase only partly digests the starch, what would you expect to happen? If the amylase only partly digests the starch, I would expect to see a faint color change as well as a small presence of glucose inside the intestine. If the amylase fails to digest the starch, what results would you expect? If the amylase fails to digest the starch, I would expect the solution inside the intestine (Dialysis tubing) to change color to blue-black due to the chemical action that will occur when the Logos regent (kill) permeates through the intestine (Dialysis tubing). Why is it necessary to have a control for this experiment? By having a control in this experiment, we can see the changes with the presence of amylase. Logos regent (kill) changes color in the presence of starch, which is the control group that we have setup that demonstrates what would happen naturally, with starch and Logos regent (kill). The control group will have a distinct comparison available for us. As amylase, an enzyme that catalysts the reawaken of the starch into glucose, which will have no reaction with Logos regent (kill) as well as no color change. We will write a custom essay sample on Lab report water specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Lab report water specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Lab report water specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Were starch molecules able to cross the membrane? No, the starch molecules were not able to cross the membrane, because if it were able to pass through, then the solution on the outside of the intestine (Dialysis tubing) would have changed color to blue-black. Were Lug molecules able to cross the membrane? Yes, the starch molecules were able to cross the membrane as we observe the lour changes that occur inside the intestine (Dialysis tubing). What is your conclusion regard amylase digestive activity? In this experiment, I concluded that amylase have the abilities to catalyst the breakdown of the starch into glucose. Also, some molecules, such as the Logos regent (kill) and glucose are able to permeate through intestine (Dialysis tubing) while others, such as starch is not able to permeate through the (Dialysis What does this experiment tell you about the size of glucose molecules and membrane permeability? This experiment tells me the size of the glucose molecule is very small in comparison to starch molecule. They have high membrane permeability that allows them to permeate through the intestine (Dialysis tubing); this is supported by the presence of glucose in the water when we conducted the glucose test. In the experiment, did the movement of glucose and starch molecule reflect the expected results of biological simulation? In this experiment, the glucose and starch molecules accurately reflected the expected results of the biological simulation. Animals starch molecule cant cross the plasma membrane to leave the intestine, similarity in our experiment, the starch solution were not able to permeate through the intestine (Dialysis tubing), thus a no change of color occurred in the Logos regent (kill) solution. Furthermore, the glucose molecules can cross membrane between the intestine and circulatory system, and this is proven accurate as we were able to test the presence of glucose in the Logos regent (kill) solution that contain amylase in the intestine (Dialysis tubing).

Probabilities for Monopoly

Probabilities for Monopoly Monopoly is a board game in which players get to put capitalism into action. Players buy and sell properties and charge each other rent. Although there are social and strategic portions of the game, players move their pieces around the board by rolling two standard six-sided dice. Since this controls how the players move, there is also an aspect of probability to the game. By only knowing a few facts, we can calculate how likely it is to land on certain spaces during the first two turns at the beginning of the game. The Dice On each turn, a player rolls two dice and then moves his or her piece that many spaces on the board. So it is helpful to review the probabilities for rolling two dice. In summary, the following sums are possible: A sum of two has probability 1/36.A sum of three has probability 2/36.A sum of four has probability 3/36.A sum of five has probability 4/36.A sum of six has probability 5/36.A sum of seven has probability 6/36.A sum of eight has probability 5/36.A sum of nine has probability 4/36.A sum of ten has probability 3/36.A sum of eleven has probability 2/36.A sum of twelve has probability 1/36. These probabilities will be very important as we continue. The Monopoly Gameboard We also need to take note of the Monopoly gameboard. There are a total of 40 spaces around the gameboard, with 28 of these properties, railroads, or utilities that can be purchased. Six spaces involve drawing a card from the Chance or Community Chest piles. Three spaces are free spaces in which nothing happens. Two spaces involving paying taxes: either income tax or luxury tax. One space sends the player to jail. We will only consider the first two turns of a game of Monopoly. In the course of these turns, the furthest we could get around the board is to roll twelve twice and move a total of 24 spaces. So we will only examine the first 24 spaces on the board. In order these spaces are: Mediterranean AvenueCommunity ChestBaltic AvenueIncome TaxReading RailroadOriental AvenueChanceVermont AvenueConnecticut TaxJust Visiting JailSt. James PlaceElectric CompanyStates AvenueVirginia AvenuePennsylvania RailroadSt. James PlaceCommunity ChestTennessee AvenueNew York AvenueFree ParkingKentucky AvenueChanceIndiana AvenueIllinois Avenue First Turn The first turn is relatively straightforward. Since we have probabilities for rolling two dice, we simply match these up with the appropriate squares. For instance, the second space is a Community Chest square and there is a 1/36 probability of rolling a sum of two. Thus there is a 1/36 probability of landing on Community Chest on the first turn. Below are the probabilities of landing on the following spaces on the first turn: Community Chest – 1/36Baltic Avenue – 2/36Income Tax – 3/36Reading Railroad – 4/36Oriental Avenue – 5/36Chance – 6/36Vermont Avenue – 5/36Connecticut Tax – 4/36Just Visiting Jail – 3/36St. James Place – 2/36Electric Company – 1/36 Second Turn Calculating the probabilities for the second turn is somewhat more difficult. We can roll a total of two on both turns and go a minimum of four spaces, or a total of 12 on both turns and go a maximum of 24 spaces. Any spaces between four and 24 can also be reached. But these can be done in different ways. For example, we could move a total of seven spaces by moving any of the following combinations: Two spaces on the first turn and five spaces on the second turnThree spaces on the first turn and four spaces on the second turnFour spaces on the first turn and three spaces on the second turnFive spaces on the first turn and two spaces on the second turn We must consider all of these possibilities when calculating probabilities. Each turn’s throws are independent of the next turn’s throw. So we do not need to worry about conditional probability, but just need to multiply each of the probabilities: The probability of rolling a two and then a five is (1/36) x (4/36) 4/1296.The probability of rolling a three and then a four is (2/36) x (3/36) 6/1296.The probability of rolling a four and then a three is (3/36) x (2/36) 6/1296.The probability of rolling a five and then a two is (4/36) x (1/36) 4/1296. Mutually Exclusive Addition Rule Other probabilities for two turns are calculated in the same way. For each case, we just need to figure out all of the possible ways to obtain a total sum corresponding to that square of the game board. Below are the probabilities(rounded to the nearest hundredth of a percent) of landing on the following spaces on the first turn: Income Tax – 0.08%Reading Railroad – 0.31%Oriental Avenue – 0.77%Chance – 1.54%Vermont Avenue – 2.70%Connecticut Tax – 4.32%Just Visiting Jail – 6.17%St. James Place – 8.02%Electric Company – 9.65%States Avenue – 10.80%Virginia Avenue – 11.27%Pennsylvania Railroad – 10.80%St. James Place – 9.65%Community Chest – 8.02%Tennessee Avenue 6.17%New York Avenue 4.32%Free Parking – 2.70%Kentucky Avenue – 1.54%Chance – 0.77%Indiana Avenue – 0.31%Illinois Avenue – 0.08% More Than Three Turns For more turns, the situation becomes even more difficult. One reason is that in the rules of the game if we roll doubles three times in a row we go to jail. This rule will affect our probabilities in ways that we didn’t have to previously consider. In addition to this rule, there are effects from the chance and community chest cards that we are not considering. Some of these cards direct players to skip over spaces and go directly to particular spaces. Due to the increased computational complexity, it becomes easier to calculate probabilities for more than just a few turns by using Monte Carlo methods. Computers can simulate hundreds of thousands if not millions of games of Monopoly, and the probabilities of landing on each space can be calculated empirically from these games.

Question Response form Case Study Essay Example | Topics and Well Written Essays - 750 words

Question Response form Case Study - Essay Example Dick inherited problems at Modrow plant; he was not included in initial planning and spent a lot of time in getting up to speed. His friendly and easy going attitude was not appreciated in the English plant as well as the Modrow plant by Canadian workers, as his casual strolls were considered as suspicious and steadily his stature and authority as a plant manager was undermined by the workers. The limitations he had as a leader was his inability to understand accounting practices and delegating tasks to his sub-ordinates, as a result he started taking interest in minor or unimportant issues of the plant. This micro management kept him away from core issues rising from expansion and modernization of the plant. His attempts to gain insights by spending time in manufacturing area were not ideal and a trusting behavior towards middle management should have brought better results in implementing the changes he wanted. He was not furnished by the relevant information by middle management a s they had doubts about his abilities as a leader additionally his obsession for gaining insight from workers left the middle management with lack of trust in him. In order for a successful change to come whether it is cost saving initiative, modernization or expansion Dick should have paid attention to more strategic issues of the time and used his time for inculcating trust within management, there are many leaders who lack the technical knowledge or experience but they achieve results by leaving the technical aspects of the work to technical staff communicating with their line managers and not seeing everything as a potential for cost saving initiatives. A gradual or incremental change would have helped Dick in first normalizing the situation due to his appointment ahead of local operating staff, gain trust of managers by staying away from the workers followed by understanding the modernization and expansion challenges. This change is suggested keeping the personality of Dick in consideration, consequently an authoritative leader would have opted for a rapid change while resisting forces would have been removed or sidelined. Dick was not authoritative and it was sheer nuisance that made him show anger towards the foremen, the strategic change approach best for him was the above said incremental one with less suspicion and exploration towards prevailing methods used by workers (Daft, 2010). Question 2. The change or improvement measure proposed by Dick to the foremen was justified and could have saved costs, what Dick missed in bringing this change was the consideration of issues faced by workers and how they wanted to work. The reason foremen disagreed with him was due to his lack of trust in him as a leader, alternatively Dick should have requested the siding manager to implement the new method of scrapping. Dick did not follow the chain of command nor did he uphold his stature as a plant manager, as a result he was ignored by the foremen and the workers a like. Change is always faced by resistance; this resistance comes from confusion or the need to continue status quo hence such resisting elements should be dealt by the managers by addressing concerns of the workers and explaining value addition to them and to the organization. Even though Dick’s intentions were good but his approach led to the

Intercultural Relations Research Paper Example | Topics and Well Written Essays - 1500 words

Intercultural Relations - Research Paper Example nies opening up their business in countries apart from their home countries, cultural integration and sharing of cross cultural values have become more important from the perspective of international business. Russia and China are two important economies in the world in terms of international business. However, the cultures prevailing in the two countries are similar and different in various dimensions. The cultural evaluation of the two countries can be done with the use of the Hofstede’s cultural dimensions theory. Russians greet in formal styles in business meetings. Handshakes are considered appropriate as forms of greeting or leaving in the business meetings. It is a common practice to exchange business cards in the beginning of a corporate meeting. Formal addressing is considered appropriate in China. Exchange of business cards at the beginning of a business meeting is indispensible (Bouwen, 2001, pp.361-369). The business meetings are conducted in formal and result oriented environment. Russia is characterised by religiosity. Most of the Russians follow the religion Christianity. However there are some percentages of people who follow Islam. Few European minorities are western Christians and roman Catholics. Russian language is the official language. However, the people are fluent in English language. Georgian language is also used in some parts of the country (Hendrickson, 1998, p.141). China is a multi religion country. A number of diverse religions are practiced including Buddhism, Taoism and to an extent Islam. Buddhism and Taoism are the most commonly followed religions in the country. Mandarin and standard Chinese are most commonly spoken language. Punctuality is important for Russian people. Handshake in formal meetings is expected. Demonstrating gestures are commonly shown by the Russian people. A firm handshake with a suitable greeting according to the time of the day is considered appropriate (Jandt, 2013, p.377). The Chinese strive to make

Macroeconomic Performance of China Essay Example | Topics and Well Written Essays - 2500 words

Macroeconomic Performance of China - Essay Example The country's economic progress is visible in terms of all these factors - the huge jump in per capita incomes, the increased scope of activities for non - state sector enterprises, and its closer integration with the global economy. The Chinese economy grew at a healthy rate of 8% in the year 2000. The growth was stimulated by supportive macroeconomic policies, and a favorable external environment. PESTLE Analysis - an Introduction: PESTLE analysis is a useful tool for understanding the "big picture" of the environment, in which you are operating, and the opportunities and threats that lie within it. By understanding the environment in which you operate (external to your company or department), you can take advantage of the opportunities and minimize the threats (RAPIDBI). Specifically the PEST or PESTLE analysis is a useful tool for understanding risks associated with market growth or decline, and as such the position, potential and direction for a business or organization. Political Environment: Political forces influence the legislations and government rules and regulations under which the firm operates. Every company faces political constraints in the form of antitrust laws, fair trade decisions, and tax programs, minimum usage legislations, pollution and pricing policies, administrative activities and many other actions, aimed at protecting the consumers and the local environment. These laws, rules and regulations affect a company's profits. However, there are other political actions such as patent laws, government subsidies and product research grants that support business activities. Thus, political forces influence the organization both positively and negatively. Political activity also influences three additional functions, viz. the supplier function, the customer function and the competitor function. The customer function is influenced by the political activity when government demand for products and services can create, sustain, enhance or eliminate many market opportunities. Economic Environment: Economic factors clearly indicate the nature and direction of the economy in which a firm operates. Every market is unique and consumption patterns change along with the wealth of the consumers in various market segments. For strategic planning all the economic trends at national and international levels have to be considered. Prime interest rates, inflation rates and trends in the growth of the Gross National Product (GNP), general availability of credit, the level of disposable income and the propensity of people to spend are the economic trends that have to be analyzed. The potential economic impact of international forces appeared to be severely restricted and was largely discounted until recently. The focus of economic environmental forecasting was changed by the new international power brokers. The European Economic Community (EEC), the Organization of Petroleum Exporting Countries (OPEC) and coalitions of lesser-developed countries (LDC) are three well known examples of influential international power brokers. Social Environment: The social environment is an important factor as changes in the values, beliefs, attitudes, opinions and lifestyles in society create potential opportunities for an organization. For a company to grow, it is necessary to take advantage of societal