Create your own scope with each ng-repeat iteration

Question

I’m trying to make a table of values to be filled and stored, row by row. However, even after filling and storing the first line, by changing the value of a select, the select of all lines above the one I am entering are having their values changed.

It is possible to isolate each line with its own scope?

Code:

 <tr class="odd" ng-repeat="itemSaida in vm.itensSaida"> 
                                <!-- SELECT DE PRODUTOS -->
                                <td class="expand">
                                     <span class="responsiveExpander">
                                         <select class="form-control" ng-disabled="itemSaida.id && !itemSaida.editando" ng-model="itemSaida.fkProduto" ng-options="produto.id as (produto.id + '-' + produto.nome) for produto in vm.produtos" ng-change="post('carregar-estoque/'+ itemSaida.fkProduto, {indice: $index})">
                                             <option value="">-- SELECIONE --</option>
                                         </select>
                                     </span>
                                </td>

                                <!-- Unidade -->
                                <td class="expand">
                                     <span class="responsiveExpander">
                                         <input type="text" class="form-control text-left" ng-disabled="true" auto-focus ng-model="vm.unidade">
                                     </span>
                                </td>

                               <!-- SELECT DE ESTOQUES -->
                               <td class="expand">
                                   <span class="responsiveExpander">
                                        <select class="form-control" ng-disabled="itemSaida.id && !itemSaida.editando" ng-model="itemSaida.fkEstoque" ng-options="fkEstoque.id as (fkEstoque.tipoEstoque.nome + ': Qtde:' + fkEstoque.quantidade) for fkEstoque in vm.estoques" ng-change="get('carregar-data-vencimento/'+itemSaida.fkEstoque)">
                                            <option value="">-- SELECIONE --</option>
                                        </select>
                                   </span>
                               </td>

                               <!-- Vencimento -->
                               <td class="expand">
                                    <span class="responsiveExpander">
                                        <input ng-model="vm.vencimento" mask="date" type="text" class="form-control text-left" ng-disabled="true" auto-focus>
                                    </span>
                               </td>

                               <td class="expand">
                                    <span class="responsiveExpander">
                                        <input type="text" class="form-control text-left" ng-disabled="itemSaida.id && !itemSaida.editando" ng-model="itemSaida.quantidade" id="quantidade" mask="decimal" maxlength="15" placeholder="Quantidade">
                                    </span>
                               </td>

To make it a little easier to understand: this is a list of items in which each row of a table will be responsible for registering an item. The figure below illustrates:

After saving the first item, when I will select the product in the bottom row, it is updating the unit both in the top row and the bottom one, but the top one should stay with the old value. This is happening because of the angle. A get request is made on the server, which updates the vm.unit variable, which ends up updating both lines..