A peer-reviewed, evidence-based journal that promotes clinical development and metabolic insights in total bariatric patient care for the healthcare professional
Bariatric Times • September 2011
Review
FIGURE 2. Normal transit of a single bite across the lower esophageal contractile segment. Copyright © CORE
generates signals to the hypothalamus. These signals may be hormonal but are more likely to be neural. A correctly adjusted band will generate a basal intraluminal pressure of 25 to 30mmHg, providing a resistance to flow. The segment of the bolus that is squeezed through generates more signals from that area. Keeping the LECS intact is a key requirement for success with the gastric band. Bad eating habits (e.g., insufficient chewing, eating too quickly, taking bites that are too large) hurt the LECS. If those bad habits go on for long enough, stretching occurs and the power of peristalsis is lost, leading to the return of hunger (Figure 4).11,12
THE FINE ART OF EATING
A quality aftercare program is essential to successful weight loss in patients after LAGB. Before making the decision to proceed with LAGB in patients, I promise my patients three things: 1) to place the band in the optimal position safely and securely, 2) that they will have permanent access to a skilled aftercare program, and 3) that I will give them the information they need to obtain the best possible weight loss from the band. In return, I ask for three commitments from my patients: 1) that they follow the rules regarding eating after undergoing the procedure, 2) that they follow the rules regarding exercise and activity, and 3) that they always come back for follow up no matter how many years have passed.6 The "Eight Golden Rules." At
my facility, we summarized guidelines for eating after LAGB into what we call the "Eight Golden Rules" (Table 1). These rules are included in a book and DVD given to every patient who undergoes LAGB at the facility.6
The
rules are also posted on www.lapbandaustralia.com.au and are reinforced at most aftercare visits. These eight golden rules must become part of each patient's life. The effect of the LAGB procedure on
hunger facilitates a patient's adherence to the rules, making it more likely that he or she will follow them. However, achieving positive results with LAGB requires a working partnership between the physician and patient. Adhering to these rules is the patient's part of the partnership, and he or she ultimately is responsible for the success or failure of weight loss following LAGB. What to eat. After undergoing LAGB, patients should eat small amounts of "good food," meaning food that is protein rich, of high quality, and in solid form. Each meal should consist of 125mL or 125g (i.e., about half of a cup of food). This measure of "half a cup" is a concept rather than a real measure of food, as some foods, such as vegetables and fruit, are composed largely of water and this has to be allowed for in some way. Thus, I allow exceeding the "half a cup" limit a little for vegetables and fruit.
sufficiently turned into mush. It is much easier to break up fish with chewing, and many fish are high in protein, including shellfish. Chicken, duck, quail, and other birds can also be cooked to be easily chewed to mush before being swallowed. Eggs and dairy, including cheese and yogurt, are also excellent protein sources. For nonanimal sources of protein, a patient should consider lentils, chickpeas, and beans. Half of the "half a cup" allotment per meal should comprise protein-rich food. The other half should be made up of vegetables and/or fruits. I recommend to my patients that they eat more vegetables than fruit because vegetables have less sugar. Any space left in the "half a cup" can be used for the starches, (e.g., bread, pasta, rice, cereals, potatoes), though I recommend to my patients that they eat a minimal amount from this group of foods as they tend to provide no important nutritional benefit.
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is adjusted correctly, there should be no need for him or her to eat between meals. In fact, even three meals a day may be more than needed for satiety. In my experience, patients have little interest in eating in the morning. By late morning or early afternoon, patients may start to notice some hunger, which indicates that it is time to have a first small meal. In the evening, patients may have another meal. Most importantly, patients should be instructed that a meal missed is not to be replaced later on. The typical human body is satisfied with a maximum of three meals per day but often is happy to accept two or even one meal per day.
Patients should be reminded that there should be no snacking between meals. If a patient finds that he or she is hungry by late afternoon, encourage him or her to eat something small and of high quality, such as a piece of fruit or some vegetables, just to tide him or her over until the evening meal. The patient should then visit the clinic to check whether or not he or she is in the Green Zone. It is important that the patient adhere to the aftercare program to monitor whether or not he or she is in the green zone. If not in the green zone, the patient will need to have fluid in the band increased or decreased.
FIGURE 3. The four components of the lower esophageal contractile segment: the esophagus, the lower esophageal sphincter, the proximal stomach, and the band. Copyright © CORE
We instruct patients to put each meal on a small plate and to use a small fork or spoon. The patient should not expect to finish all of the food on the plate, but rather he or she should plan to stop when he or she is no longer hungry. Any food left on the plate should be discarded. Protein-rich foods. Protein is the most important macronutrient in the food a LAGB patient eats. At our clinic, we recommend that our patients consume approximately 50g of protein per day. We have measured protein intake of our patients (Table 2) and have monitored their blood levels. We have not seen any protein malnutrition after LAGB, indicating that a daily intake of about 50g a day is sufficient. Table 2 shows the energy and macronutrient intake of 129 consecutive patients measured before and at one year after LAGB. Note the mean energy intake is reduced by approximately 1500kcals.17 The best source of protein is meat; however, red meats, such as beef and lamb, tend to be difficult to break up with chewing in order to be
High-quality foods. High-quality food are foods that are minimally processed, natural, and whole. We encourage our patients to look for quality over quantity—for example, they might try sashimi-grade tuna, smoked salmon, duck breast, lobster, or even a simple poached egg. It is also important to remind your patients that there is no limit to the amount of herbs and spices that can be used to enhance the flavors of their foods. Solid foods. The patient should choose solid foods over liquids whenever possible. Liquids pass too quickly across the palate and, more importantly, too quickly across the band. There is no need for the esophagus to squeeze liquid, and without the squeeze, there is no stimulation of the IGLEs and no induction of satiety; therefore, eating calorie-containing liquids may negatively impact a patient's weight loss.
When to eat. After undergoing LAGB, a patient should eat three or less times per day. If the patient is in the green zone, meaning that the band
How to eat. Take a small bite and chew well. The "half a cup" of food should be placed on a small plate. The patient should use a small fork or a small spoon to eat. A single bite of food should be chewed carefully for 20 seconds. This provides the opportunity to reduce that bite of food to mush. It also provides the important opportunity for the patient to actually enjoy the taste, the texture, and the flavor of the food. Encourage your patients to enjoy eating more than they ever have. After chewing the food until it is mush, the patient should swallow that bite.
Swallow, then wait a minute. The patient must wait for that bite to
FIGURE 4. The destruction of the lower esophageal contractile segment by distending the area above the band. Copyright © CORE